Garden vs. Mid-Rise vs. High-Rise: Multifamily Density Economics

Key Takeaways

Density Is the Master Variable

In multifamily underwriting, the density tier sets almost everything else. Once you decide whether a site is garden, wrap, mid-rise, or high-rise, you have implicitly committed to a construction type, a hard cost per square foot, a parking ratio, an amenity stack, a rent ceiling, a target NOI margin, a target exit cap, a levered IRR band, and a specific capital market that finances the deal. Pick the wrong tier for the site and every downstream number is misallocated: land basis is mis-sized, the construction type doesn't fit the cost basis, the rent premium isn't there, the parking ratio is wrong, the cap rate at exit doesn't compress to where the proforma assumed, and the lender you brought to the table isn't the one this deal should have gone to.

Density also determines who else is in the market with you. NMHC's March 2026 Quarterly Construction Survey puts the in-progress multifamily mix at roughly 55% townhouse and garden, 34% mid-rise, and 10% high-rise. The deliveries you compete with for lease-up, the cap rates you exit into, and the LPs writing equity checks for the strategy are different across those bands. A garden deal in a Sun Belt secondary is competing with agency-funded merchant builders and private syndicators; a high-rise in a gateway market is competing with sovereign and core institutional capital on a 24-to-36-month construction timeline. The two are not interchangeable allocations.

The four density tiers used in this article align with NCREIF's property-type definitions: Garden (design garden, low-density walk-up), Low-Rise (1–4 floors, not garden), Mid-Rise (5–10 floors), and High-Rise (more than 10 floors). The institutional vocabulary collapses the first two into "garden / low-rise" in practice, and splits the mid-rise tier between wood-frame wrap or podium construction and concrete construction at the same floor count. This article walks all four tiers in the institutional order, prices them at 2026 numbers, maps each to the right capital source, and ends with a 200-unit side-by-side that doesn't exist anywhere else on the open web. Stryker Properties stops at three tiers. Adventures in CRE covers garden only. JHP Architecture has the density numbers but no economics. Nobody has built the four-tier reference an underwriter actually uses.

Tier 1: Garden (2–4 Stories, Type V Wood-Frame, Surface Parking)

Garden-style multifamily is the workhorse of U.S. apartment supply. Two to four stories, all wood-frame (Type V-A or V-B per the International Building Code), spread across multiple buildings on 8–20+ acres of land, with surface parking and a modest amenity stack. Density runs 15–30 units per acre — JHP Architecture's density framework puts traditional garden at 19–25 UPA; Stryker Properties uses a 15–30 UPA range that captures suburban variants on either end. Typical project size is 150–400 units across the site. NCREIF's "Garden" sub-index in the NPI captures this tier.

The construction-cost story is the cleanest of the four tiers. Wood-frame is the cheapest residential structural system in the U.S., and surface parking eliminates the structured-parking premium that podium and high-rise construction carry. EVstudio's published cost data from an 800-unit Type V dataset prices suburban 2–3 story walk-ups at $130–170 PSF; Stryker prices low-rise garden product at $150–190 PSF. The cost range is regional. Multifamily.loans' 2026 construction cost guide shows secondary markets running $250–350 PSF on a national average basis (across types), with tertiary at $250–300. California garden runs roughly 2.3x Texas garden at the same spec, per RSMeans regional cost factors. The headline is that garden is the only tier where land cost, not vertical construction cost, is usually the binding constraint on whether the deal pencils.

Garden rents are the lowest absolute PSF of the four tiers and the lowest absolute per-unit. Historical RealPage / MPF tracking (cited by Wealthmanagement.com) shows national garden average rents around $1,079 against $1,559 mid-rise and $1,815 high-rise. Pull those numbers forward to the 2026 Sun Belt and garden runs roughly $1,185–1,626 per unit across the major metros — Houston, Phoenix, Dallas, Atlanta, Nashville, Tampa, Raleigh — with rent PSF generally $1.50–1.95. Garden trades on absolute rent affordability, not premium pricing. The renter is paying less per unit than they would in any other typology in the same metro, and the operator is delivering it with the lowest cost basis.

Parking and amenity are correspondingly modest. 1.5–2.0 spaces per unit, surface, uncovered, free to residents. The amenity stack is pool, fitness room, leasing office, sometimes a clubhouse and a dog park. No structured parking, no rooftop deck, no concierge, no co-working floor. The operating model is simple and the OpEx margin reflects it: NOI margins typically run 58–62% on stabilized garden in the Sun Belt.

Exit caps in the 2026 environment sit at 5.25–6.25% for institutional-quality garden core/core-plus in the Sun Belt; 6.0–7.0%+ for tertiary or value-add. CBRE's 2026 U.S. Real Estate Market Outlook for Multifamily puts the prime / institutional going-in cap rate around 4.75% with exit around 4.96% — a ~21 bps spread — but that's the gateway and trophy slice; Sun Belt garden sits roughly 50–100 bps wider on cap rate than gateway prime. Target levered IRR is 11–14% on core/core-plus stabilized acquisitions with agency debt, stretching to 14–18% on value-add with a credible interior-renovation and rent-roll-improvement program.

The capital source profile is what makes garden the deepest-funded tier in the U.S. multifamily market. Agency debt (Fannie Mae DUS and Freddie Mac Optigo) is dominant for stabilized garden acquisitions — DSCR Plus, Small Balance Loans, Green Up programs, and standard agency execution all favor garden underwriting because the asset class has the largest historical dataset and the lowest historical loss severity in the agency portfolios. Bridge debt funds finance transitional and value-add garden deals; HUD 223(f) handles refinances after a value-add program completes. Equity ranges from regional sponsors and syndicators (the BiggerPockets register at the smaller end) through institutional LPs deploying via Sun Belt-focused private funds. The garden tier is where institutional capital has flowed most aggressively over the last decade.

Garden works when land basis is below roughly $5K–15K per unit (an 8-acre Sun Belt site at $80K/acre against a 200-unit plan), the site is large enough to spread 15–30 UPA, the metro supports professional single-family-to-multifamily rental flight (Sun Belt and secondary Midwest), and demographics support the rent band. It stops working on coastal urban infill where land is $80K+ per unit, in metros where parking ratios are regulated below 1.5 spaces per unit, and in submarkets where existing garden has aged into Class C and rent ceilings cap returns. The Slate Asset Management $226M Sun Belt garden portfolio acquisition is the institutional template for the current cycle: stabilized agency-financed garden in 2026 Sun Belt is a low-cap, deep-debt, modest-IRR allocation that institutional capital is buying for income and inflation protection, not for upside.

Tier 2: Wrap / Texas Donut (4–5 Stories, Type V over Type I Podium)

The wrap (or Texas donut) is the bridge between garden and mid-rise. Four to five stories of wood-frame apartments built around an above-grade concrete parking deck — the "donut" with the deck in the middle. Density runs 50–90 units per acre, per BASE4 Architecture's typology framework. Construction is Type V wood-frame for the residential floors over a Type I concrete parking structure; the prototype originated in Texas in the late 1990s as a way to capture higher density on infill sites without paying the full structured-parking premium of a true podium. The prototype now ships in every Sun Belt metro and increasingly in secondary Midwest markets.

Cost basis runs $200–275 PSF in 2026 (Stryker Properties prices wrap at $225–275; the lower end of the range captures suburban donuts in markets with low labor cost). The wood-frame residential floors are still cheap; the cost adder versus garden is the concrete parking structure and the deeper site excavation. Wrap rents PSF run roughly 1.2–1.4x garden in the same submarket because the higher density typically supports a more urban submarket placement; absolute per-unit rents typically come in at $1,500–1,950 in 2026 Sun Belt. Parking ratio is 1.2–1.5 spaces per unit, structured in the deck, often paid by residents as a separate ancillary at $50–125 per month per space.

Exit caps for institutional wrap in 2026 Sun Belt sit at 5.00–5.75% — about 25–50 bps tighter than the garden in the same metro because the urban-infill placement and structured-parking ancillary typically command modest cap compression. Target levered IRR is 13–16% on core-plus stabilized acquisitions; merchant-build development targets 17–21%.

The capital source for wrap is mixed and depends on stage. Agency debt finances stabilized wrap, sometimes at tighter pricing than equivalent garden if the property has a stabilized rent roll and 90-day trailing operations. Construction debt for ground-up wrap is dominated by regional banks and balance-sheet community bank lending, with HUD 221(d)(4) the underused 87% loan-to-cost, 40-year, fixed-rate non-recourse alternative for sponsors who can absorb the Davis-Bacon prevailing-wage requirement and the 12–15 month HUD approval timeline. The construction-debt market for wood-frame mid-rise contracted materially in 2024–2025 as regional banks pulled back; life-co construction debt and dedicated debt funds have stepped into the gap with wider spreads (300–450 bps over SOFR vs. 200–300 bps pre-2023). See our construction-loan deep-dive for the draw-schedule and interest-reserve mechanics that determine whether the cost basis actually pencils.

The 2026 overlay hit wrap hardest of any density tier. The fire-frame insurance surcharge that Metropolitan Risk Advisory tracks — 15–40% premium increases on Type V wood-frame builder's risk policies in 2024–2026 — falls on Type V construction throughout the residential floors, not on the Type I concrete podium. The data-center labor pull tracked by ConstructionDive and ABC's worker-shortfall data falls on framing, MEP, and finish trades that wrap construction relies on. The result is a tier that priced as a $200–225 PSF play in 2022 now pricing at $250–275 PSF net-of-insurance and net-of-wage-pressure in 2026. The pencil math has tightened.

Tier 3: Mid-Rise (5–7 Stories, Podium or Concrete)

The mid-rise tier covers two distinct construction types delivering similar density and rent profiles: the wood-frame podium (the iconic 5-over-1 — five stories of Type V wood over a one-story Type I concrete podium for parking and ground-floor retail), and the concrete-or-mass-timber mid-rise (Type I-B at 5–7 stories, or Type IV-A/B/C mass timber). Both produce 80–120+ units per acre and serve urban infill submarkets that don't justify high-rise but warrant more than wrap density. Mixed-use ground-floor retail is common.

The 5-over-1 podium has been the dominant ground-up apartment delivery prototype in U.S. urban infill for the last fifteen years. WoodWorks tracking indicates 85% of new mid-rise apartments use podium construction. Construction is Type III-A for five-story all-wood-frame with noncombustible exterior walls, or Type V over Type I for the podium variant. Wood framing is ~60–70% cheaper PSF than concrete or steel residential floor plates, which is what drove the prototype's economics — the savings on the residential floors offset the cost of the concrete podium and made 5-over-1 the highest-density wood-frame apartment building the U.S. code allows.

Cost basis in 2026 runs $235–350 PSF across the mid-rise tier — with the lower end capturing suburban 5-over-1 ($235–265 PSF) and the upper end capturing urban podium with deeper structured parking and richer amenity ($300–350 PSF). EVstudio's published cost data shows suburban podium/wrap at $150–190 PSF as recently as 2023; the 2026 number reflects the cumulative effect of fire-frame insurance, steel and aluminum tariffs, and trades wage inflation. Stryker prices podium at $300–400 PSF at the upper end, capturing the most-amenitized urban infill.

Concrete and mass-timber mid-rise (Type I-B and Type IV) run $280–380 PSF in 2026, with mass timber pricing at roughly a 3–8% premium over equivalent concrete spec (narrowing as supply chains mature). Mass timber's pre-fab elements enable 25–30% faster vertical structure than concrete on a comparable mid-rise envelope, partially offsetting the per-PSF premium through reduced interest carry and earlier rent commencement. Mass timber starts remain below 2% of multifamily share but are growing fastest of any construction type per WoodWorks tracking. The notable institutional examples in 2026 include Ascent in Milwaukee (25-story, more high-rise than mid-rise, but the global tall-timber benchmark) and a growing roster of 6–8 story Type IV-C mid-rises in Portland, Seattle, Vancouver, and increasingly the Northeast and Mid-Atlantic.

Rent PSF on mid-rise sits 30–60% above garden in the same metro. Historical RealPage / MPF data puts mid-rise at $1,559 vs. garden $1,079 (44% premium); 2026 Sun Belt urban infill mid-rise commands $1,800–2,400 per unit, $2.10–2.85 PSF. Parking ratio is 1.0–1.5 spaces per unit, structured, often paid as an ancillary at $100–200 per month per space. Amenity stack expands materially: pool deck, full fitness with peloton bikes, co-working lounge, rooftop terrace, package room, EV charging, dog wash, ground-floor retail in mixed-use. NOI margin runs 60–64% on stabilized urban infill mid-rise — slightly higher than garden because higher absolute rents dilute the fixed-cost base.

Exit caps run 4.75–5.50% in 2026 Sun Belt urban infill institutional; tighter to 4.50–5.00% in true gateway submarkets. Target levered IRR is 12–15% core-plus, 15–20% merchant-build development. The merchant build/sell strategy that drove the 2014–2022 supply wave was concentrated in this tier — Toll Brothers, JPI, Wood Partners, Greystar development, Mill Creek, Trammell Crow Residential all built and sold 5-over-1 podiums in the same Sun Belt urban submarkets, and the resulting supply wave in 2024–2025 is what compressed near-term rent growth in Austin, Charlotte, Nashville, Phoenix, and Raleigh.

Capital sources mix more than at any other tier. Stabilized mid-rise finances through agency debt (Fannie DUS, Freddie Optigo) once a 90-day trailing rent roll exists. Construction debt is balance-sheet bank (regional or money-center depending on size), with HUD 221(d)(4) as the 87% LTC alternative for sponsors who can navigate the process — our HUD 221(d)(4) deep-dive walks the underwriting and timeline mechanics. Bridge debt funds bridge transitional deals; insurance company permanent debt finances stabilized urban infill at competitive long-term fixed-rate execution. Equity is institutional LP commingled funds and merchant builders recycling equity through the build/sell cycle.

Tier 4: High-Rise (8+ Stories, Type I-A Concrete and Steel, Structured Parking)

High-rise multifamily is its own asset class. More than ten stories per NCREIF's definition, Type I-A construction per the IBC (concrete columns and post-tensioned slabs is the most common U.S. high-rise residential system; steel with composite floors is the alternative on tall towers), 2–3 hour fire-resistive rating, no combustible structural elements. Density runs 140–300+ units per acre. Typical projects are 200–600 units in a single tower; signature towers reach 800–1,200 units. NCREIF's "High-Rise" NPI sub-index captures the institutional slice of the tier.

Cost basis runs $400–675 PSF in 2026 across most institutional U.S. high-rise multifamily, with the $400–500 PSF range capturing typical Sun Belt urban core (Austin Domain, Charlotte SouthEnd, Nashville Gulch, Tampa Water Street). NYC, SF, Boston, Honolulu, and DC high-rise: $550–800+ PSF. Multifamily.loans cites a $270–675 national PSF range for U.S. high-rise; the 2026 mid-band is meaningfully higher than 2022 in absolute dollars because of structural steel and tariff overhang. Structural steel rose 11.9% in 2025 per Tax Credit Advisor and KOWBC tracking; the embedded tariff-driven cost premium on steel-intensive scopes runs $15–25 PSF per current Tax Credit Advisor reporting. Concrete and rebar pricing moved less in 2025 but are subject to the same general construction-cost inflation.

Construction speed is the slowest of the four tiers. Typical high-rise multifamily takes 24–36 months from groundbreaking to certificate of occupancy, with another 12–18 months for lease-up. The full development timeline from site control to stabilization is routinely 4–5 years on high-rise versus 30–36 months on mid-rise and 24–30 months on garden. The longer timeline compounds with the higher cost basis to produce materially larger interest reserves; the construction-loan interest-reserve math in our construction-loan article applies most acutely to this tier.

Rent PSF is the highest of the four tiers. Historical RealPage / MPF averaged $1,815 high-rise vs. $1,815 vs. $1,559 mid-rise — a 16% premium. In 2026, gateway high-rise routinely runs $3,000–5,000+ per unit ($3.75–6.50 PSF in places); Sun Belt urban high-rise runs $2,200–3,500 per unit ($2.75–4.50 PSF). Parking ratio is the lowest of the four tiers: 0.7–1.2 spaces per unit, structured (typically below-grade in gateway markets or wrapped above-grade in Sun Belt), paid as a meaningful ancillary at $150–300 per month per space in major markets. Amenity stack is full institutional: sky lounge, indoor pool, full fitness with spa and sauna, co-working floor, screening room, golf simulator, dog spa, 24/7 concierge, valet, rooftop bar (in mixed-use), retail on multiple floors.

NOI margin on high-rise typically runs 55–60% — lower than mid-rise because the amenity stack adds significant fixed OpEx (concierge headcount, pool deck maintenance, elevator service contracts on multiple high-speed elevators, façade cleaning, structural inspections, higher insurance for tall buildings) that absolute rent levels don't always overcome. Exit caps run 4.00–4.75% in gateway core (NYC, SF, LA, Boston, DC) for institutional high-rise; 4.50–5.25% in Sun Belt urban core. Target levered IRR is 10–13% core (stabilized acquisition), 16–22% development (merchant build), and 18–25%+ opportunistic (entitled-shell, partial-tower acquisitions).

The capital market for high-rise is the most constrained of any density tier in 2026. Agency caps and DSCR-driven sizing don't always support the high-rise cost basis on Sun Belt deals; gateway high-rise often exceeds agency's largest single-loan parameters. Construction debt is dominated by money-center balance sheet (JPMorgan, BofA, Wells Fargo, Citi, plus the Canadian banks at the upper end and the Japanese and Korean banks on select gateway deals), with a handful of life cos and dedicated debt funds active. HUD 221(d)(4) is technically available at high-rise scale but is rare in practice — the HUD process favors smaller transactions and the cost-basis threshold limits applicability. EB-5 returned as a meaningful slice of the high-rise capital stack in 2024–2026, particularly in NYC and Florida; mezzanine and preferred equity from KKR Real Estate Credit, Pacific Western, and bespoke balance-sheet allocators fill the gap between senior debt and common equity.

Common equity is dominated by institutional core funds (Blackstone, Brookfield, JPMorgan Asset Management, Ares), sovereign capital (Singapore GIC, Norges Bank, ADIA, CPP Investment Board), and the largest sponsors with permanent or near-permanent capital (Related, Tishman Speyer, Greystar's institutional vehicles, Equity Residential, AvalonBay). See our bank-debt recourse-vs-nonrecourse guide for the recourse mechanics that materially shape sponsor selection at this tier.

High-rise works on gateway urban core sites where land basis exceeds $200K per unit, rent achievable is $3.50+ PSF, the capital partner has patient duration, and the merchant-build path has a deep pre-stabilization exit market or a build-to-core institutional hold. It doesn't work in Sun Belt sub-markets where land doesn't justify Type I-A premium over mid-rise, in markets where construction debt for high-rise is effectively closed, or in supply-wave-affected submarkets where the 24–36 month construction timeline crosses the lease-up cycle wrong.

Construction Type to Density Mapping

The relationship between density tier and IBC construction type is direct, though the boundary cases between Type III, Type V over Type I, and Type I-B can be ambiguous. The institutional mapping:

Construction-type to density-tier mapping. IBC types from the 2024 International Building Code; UPA ranges synthesized from JHP Architecture, BASE4, and Stryker Properties.

The 2026 Construction Cost Overlay

The 2010–2022 cost ranges that competitor articles still cite are obsolete. Four discrete cost shocks have moved through U.S. multifamily construction since 2023, and the cumulative effect is to narrow the wood-vs-concrete cost gap that historically defined the density-tier decision. Reading the 2026 economics through 2022 cost data is the most common error in current underwriting briefs.

The fire-frame insurance surcharge. Metropolitan Risk Advisory tracks 15–40% premium increases on Type V wood-frame builder's risk policies through 2024–2026, with water-damage exclusions tightening across the market and several carriers exiting wood-frame altogether. The surcharge falls entirely on Type V construction; Type III mixed-construction is hit moderately; Type I concrete and steel are unaffected. On a $200 PSF wood-frame baseline, the insurance surcharge adds $4–8 PSF in carrying cost depending on construction duration and the specific carrier's underwriting. On a $400 PSF concrete baseline, it adds nothing. The net effect is to compress the wood-vs-concrete cost gap by 1.5–3% of total cost basis.

The data-center labor pull. ConstructionDive and ABC report a 349,000-worker shortfall in U.S. construction trades in 2026, with construction wages up 4% YoY broadly and 9–11% YoY in high-demand markets and specialized trades. The pull on framers, electricians, plumbers, and HVAC techs is coming from data center construction in Northern Virginia, Phoenix, Atlanta, Columbus, and increasingly Reno and Nashville, with hyperscaler buildouts paying premium wages on accelerated schedules. Multifamily and affordable housing construction are hit hardest. Per Hub International's Construction Outlook 2026, the labor inflation is permanent on the upside in markets where data center demand is structural; the labor adders fall most heavily on wood-frame typologies that rely on framing, MEP, and finish trades that are most directly competitive with data center construction. Concrete pours and structural-steel erection are less affected.

The steel and aluminum tariff overhang. Structural steel pricing rose 11.9% in 2025 per Tax Credit Advisor and KOWBC; the embedded tariff-driven cost premium on steel-intensive scopes is currently $15–25 PSF in current reporting. Concrete and rebar pricing moved less in 2025 but are subject to the same general inflation. The tariff overhang falls almost entirely on Type I-A high-rise and on steel-intensive Type I-B mid-rise; wood-frame Type V is largely unaffected (steel content in Type V is concentrated in joist hangers, hold-downs, and connector hardware, not in primary structure). Net effect: the cost gap between high-rise and the wood-frame tiers stays wide, even as the wood-vs-concrete mid-rise gap narrows from the insurance and labor side.

The 5-over-1 stall. Multi-Housing News and Multifamily Dive have documented through 2024–2025 a meaningful slowdown in 5-over-1 podium starts as the combined effect of fire-frame insurance, labor pull, and construction-debt market contraction has made the prototype's economics tougher to pencil. NMHC's March 2026 Quarterly Construction Survey shows mid-rise at 34% of in-progress projects vs. 55% townhouse/garden; the townhouse/garden share is up from prior surveys, mid-rise is flat-to-down, and the share of starts shifting toward lower-density typologies is the supply-side signature of the stall. ULI's Emerging Trends in Real Estate 2026 reflects the same shift in institutional sentiment: capital allocations in 2026 favor garden and high-rise relative to the 2018–2022 podium-heavy mix.

NMHC's March 2026 Quarterly Construction Survey reads against this backdrop with measured optimism. 43% of firms expect costs to decrease or grow slower than inflation in the next quarter; only 10% expect costs to outrun inflation. The implication is that the cumulative cost shock through 2025 has peaked and 2026 deliveries are entering a stabilization band rather than a continued upcycle. Multifamily starts are projected down ~5% in 2026 after the late-2025 permit spike of 18%, against a 30-year low in 2024–2025 starts. The marginal deals that stalled during 2024–2025 are not coming back; the deals that pencil at 2026 cost basis are the ones moving forward.

Worked Side-by-Side: 200 Units, Same Sun Belt Metro, Three Density Tiers

The cleanest way to see the density-tier decision is to model the same unit count and the same metro at three different prototypes. The table below works 200 units in an urban Sun Belt market (Austin, Charlotte, Nashville, Phoenix, or Tampa — the numbers are illustrative and not deal-specific) as garden, mid-rise (5-over-1 podium), and high-rise. Land basis, construction type, achievable rent, OpEx, and exit cap shift across the three columns. The shape is what matters — the absolute numbers will adjust for the specific metro and submarket.

200 units, same Sun Belt metro, three density prototypes. Illustrative figures; the shape (yield-on-cost compresses sharply as density rises; exit cap compresses modestly) is what matters for the prototype decision.

The development margins are negative across all three tiers at 2026 cost basis and 2026 exit caps in this illustrative metro — which is a feature of the current environment, not the example. Cost basis has caught up to stabilized cap rates faster than rent growth has caught up to cost basis. The point isn't that all three tiers fail (real Sun Belt markets in 2026 vary significantly — Austin and Nashville pencil differently than Tampa or Charlotte; the metro choice matters as much as the tier choice). The point is that the shape of the three columns reveals which tier is most defensive when cost basis runs ahead of rent growth.

Garden has the lowest absolute cost basis ($46.8M), the highest yield-on-cost (5.40%), and the smallest yield-on-cost-to-exit-cap gap (5.40% vs. 5.50% = −10 bps). The garden development margin in this illustration is essentially zero — the deal pencils to value-equals-cost in this metro. Mid-rise carries a meaningfully higher cost basis ($75.4M, 61% above garden), a 4.16% yield-on-cost, and a −84 bps gap to exit cap. The mid-rise penciles negative by $12.6M in this illustration — the prototype that worked in 2018–2022 at cap-rate-compression assumptions doesn't work in 2026 at a 5.00% exit cap unless rents come in 10–15% above this assumption. High-rise carries a $185.8M cost basis (4x garden), a 2.22% yield-on-cost, and a −253 bps gap to exit cap — the prototype only works on gateway-grade rents that exceed this illustration's $3.00/unit assumption by 20–40%.

The institutional reading: in 2026, garden is the only density tier that pencils close to break-even on development math in most Sun Belt metros at illustrative 2026 cost basis. Mid-rise pencils selectively in the submarkets where rent is genuinely $2.50+ PSF (urban infill Austin, Nashville Gulch, Charlotte SouthEnd at the right submarket, parts of Phoenix Camelback, Tampa Water Street); high-rise pencils only where rent is $3.50+ PSF (gateway core or a tight Sun Belt urban core comparable). This shape is why the NMHC March 2026 data shows the in-progress mix shifting toward townhouse / garden share.

Density Determines the Debt Market

The most under-appreciated implication of the density-tier decision is that it determines the debt market the deal will live in. Garden, wrap, mid-rise, and high-rise are not financed by the same lenders. The capital structure that fits one tier doesn't fit the next; the lender that loves your garden deal can't underwrite your high-rise, and vice versa. This is the bridge that connects this article to the capital-structure cluster on Apers' /learn/ site.

Garden → agency dominant. Fannie Mae DUS and Freddie Mac Optigo are the deepest debt markets in U.S. multifamily, and they are most aggressive at the garden tier where loss-severity history is shortest and underwriting standards are most established. The ~320 monthly searches on "Fannie Mae multifamily" and 260 monthly on "Freddie Mac multifamily" reflect institutional researchers landing on agency execution for stabilized garden; this article validates that conclusion. HUD 223(f) handles refinances after value-add programs complete. The garden tier is the only one where senior debt is genuinely abundant in 2026.

Wrap → bank balance sheet, with HUD 221(d)(4) as the 87% LTC alternative. Construction debt for wrap and Texas donut comes through regional and community banks, with HUD 221(d)(4) as the higher-LTC, non-recourse, fixed-rate alternative for sponsors who can absorb Davis-Bacon prevailing-wage and the 12–15 month HUD approval timeline. The HUD execution — covered in detail in our HUD 221(d)(4) deep-dive — is the underused alternative when bank construction-debt market constraints close standard execution. Stabilized takeout is agency, same as garden.

Mid-rise wood-frame → bank balance sheet or HUD 221(d)(4). Same pattern as wrap at higher cost basis. Mid-rise construction debt sits with regional banks for smaller deals and money-center banks for larger; HUD 221(d)(4) is the institutional alternative for the right sponsor. Bridge debt funds bridge transitional mid-rise deals. Insurance-company permanent debt is increasingly active at the mid-rise tier for stabilized urban infill on long-term fixed-rate execution. Pref equity and mezz fill the gap between senior debt (typically capped at 65–75% LTC on bank balance sheet for non-HUD execution) and the common-equity capitalization.

Mid-rise concrete and mass timber → same as wood mid-rise plus ESG capital. Same senior debt and subordinate stack as wood mid-rise, with a small but growing slice of institutional equity preferentially allocating to mass timber for ESG mandate compliance. Life-co construction debt has expanded share at the concrete and mass-timber mid-rise tier.

High-rise → constrained debt market. Construction debt is dominated by money-center balance sheet (JPMorgan, BofA, Wells Fargo, Citi at the U.S. end; Royal Bank of Canada, BMO, TD on Canadian-bank syndicates; Mitsubishi UFJ, SMBC, MUFG on Japanese-bank executions; KEB Hana and Shinhan on Korean-bank gateway deals) and a handful of life cos and dedicated debt funds. HUD 221(d)(4) is technically available but rare at high-rise scale. EB-5 has returned as a meaningful mezzanine slice in NYC and Florida high-rise. Mezzanine and preferred equity from KKR Real Estate Credit, Pacific Western, Pretium, and bespoke balance-sheet allocators fill the gap between senior debt and common equity. Our bank-debt recourse-vs-nonrecourse guide covers the recourse mechanics that materially shape sponsor selection at this tier — high-rise construction debt is routinely partial-recourse to creditworthy sponsors and rarely fully non-recourse outside HUD execution.

Common equity at the high-rise tier is dominated by institutional core funds (Blackstone, Brookfield, JPMorgan Asset Management, Ares), sovereign wealth (Singapore GIC, Norges Bank, ADIA, CPP Investment Board, Korea Investment Corporation), and the largest sponsors with permanent or near-permanent capital (Related, Tishman Speyer, Greystar's institutional vehicles, Equity Residential, AvalonBay, Camden Property Trust). The capital market is deep but selective: sovereigns underwrite gateway high-rise on 15–25 year hold horizons at IRR targets in the high single digits to low double digits; core funds underwrite on 10–15 year holds at low teens. The high-rise tier is the most institutional and the most concentrated at the top of the LP capital stack.

The Texas Donut Callout

The Texas donut (also called the wrap, or the "fat-five" in some markets) merits a dedicated section because the prototype has its own search demand — 1,000 monthly searches on "Texas donut" alone — and because it occupies a specific institutional niche that competitor articles routinely miss.

What the Texas Donut Is

The Texas donut is a four-to-five-story wood-frame apartment building constructed around an above-grade concrete parking deck — the "donut" with the parking deck as the hole in the middle. The residential units form a rectangular or oval ring around the deck on each floor. Stairs and elevators connect the ring to the parking levels. The prototype delivers 50–90 units per acre, places ~1.0–1.5 parking spaces per unit in structured deck (vs. 1.5–2.0 in surface garden), and fits on roughly a 1.5–3 acre infill site.

Origin and Spread

The prototype originated in Texas in the late 1990s as developers in Austin, Dallas, and Houston looked for a way to capture higher density on urbanizing infill sites without paying the full structured-parking premium of a true podium. The above-grade deck wrapped by wood-frame residential delivered 80% of podium density at 70% of podium cost basis. The prototype spread through the Sun Belt in the 2000s and is now the dominant urban-infill apartment typology in Austin, Charlotte, Nashville, Phoenix, Dallas, Houston, Tampa, Raleigh, and increasingly Atlanta and Orlando. It also appears in secondary Midwest markets (Indianapolis, Columbus, Kansas City) and parts of the Mountain West (Denver, Salt Lake City, Boise, Reno).

2026 Economics

Cost basis runs $200–275 PSF in 2026. Density 50–90 UPA. Rent PSF roughly 1.2–1.4x equivalent garden in the same metro. Exit cap 5.00–5.75% Sun Belt. Target levered IRR 13–16% core-plus, 17–21% merchant-build. The prototype's structural appeal is the combination of urban-infill density with wood-frame cost economics — a position that mid-rise podium and high-rise can't replicate at the same basis. Its current vulnerability is the same as wood-frame mid-rise: the fire-frame insurance surcharge and the data-center labor pull are tightening the basis.

When the Texas Donut Wins

The Texas donut wins in submarkets that are urbanizing fast enough to support 50–90 UPA density but where rents don't yet support full podium cost basis — the in-between case where garden's surface parking doesn't fit the site and mid-rise podium overshoots the rent ceiling. Most of urban Sun Belt fits this pattern.

When You'd Build Down Rather Than Up

The default development heuristic from 2010 through 2022 was straightforward: if a site supports mid-rise, build mid-rise; if it supports high-rise, build high-rise. Higher density meant higher absolute rents, higher exit valuations, and a better merchant-build outcome. The 2026 math has shifted enough that the heuristic doesn't always hold. In a meaningful number of submarkets, the right answer on the same site is to build down rather than up — garden where the zoning supports mid-rise, mid-rise where it supports high-rise.

Four forces drive the inversion. Insurance surcharges falling disproportionately on wood-frame have narrowed the wood-vs-concrete gap, but they haven't eliminated the absolute cost advantage of wood-frame at lower densities — surface parking still costs $0 per space versus $15,000–30,000 per space in a structured deck. Structured-parking cost increases (steel rebar, post-tensioning labor) have raised the per-space cost of decks meaningfully, which falls on wrap and podium more than on garden. Supply-wave rent compression through 2024–2026 in the major Sun Belt urban infill submarkets has compressed the rent premium that mid-rise needs to justify its cost-basis premium over garden. And the agency-debt advantage of garden — 75–80% LTV, 30–35 year amortization, IO on the front end, lifetime non-recourse — widens the levered IRR gap in garden's favor at lower yield-on-cost.

The combination can flip the prototype decision on a site that would have been mid-rise in 2018. The 2-acre infill parcel in suburban Charlotte that would have penciled at 100 UPA mid-rise in 2018 at $190 PSF and $1.85 rent PSF pencils more defensively in 2026 at 25 UPA garden at $175 PSF and $1.85 rent PSF — the garden delivers fewer units but at a cost basis that doesn't require rent growth to break even, and on agency debt that levers the equity check more efficiently. The choice depends on the specific submarket: in genuine urban-infill core (Austin downtown, Nashville Gulch, Charlotte SouthEnd at the right block), mid-rise still wins because the rent achievable is genuinely 30%+ above garden in the same submarket. In transitional submarkets (Charlotte University, Phoenix North, Dallas Frisco edge), the math has flipped.

This is a counterintuitive content point that 2018-vintage practitioners need to update for the current cycle. The mid-rise default is no longer the right default.

NCREIF Building-Type Sub-Index Shape

NCREIF's NPI separates institutional apartment returns into Garden, Low-Rise, Mid-Rise, and High-Rise sub-indices. The historical shape:

• Garden has historically shown higher rent volatility (more concession activity, more renewal-renewal turn) but lower price volatility (less cap-rate compression and decompression) than High-Rise. The garden sub-index has been the most consistent NPI total-return contributor over rolling 10-year windows, helped by agency-debt cost advantage and lower OpEx margins.

• Mid-Rise has had the strongest combined total-return profile over the last 10 years on the back of 2014–2022 cap-rate compression in urban infill and rent growth in the urban-cohort demographic. The 2024–2026 environment is testing that profile as supply-wave compression and cost-basis inflation meet headwind exit caps.

• High-Rise has shown the highest price volatility (most cap-rate sensitivity, most gateway-market beta) and lower NOI margin than mid-rise but the highest absolute rent levels. The sub-index has been the most sensitive to interest-rate moves in 2022–2024.

The quarterly numbers shift — refer to NCREIF directly for the current vintage. The shape across cycles is consistent: density correlates with rent level and exit-cap sensitivity but not necessarily with total return. Mid-cycle, garden has typically been the most defensive allocation; in cap-rate compression cycles, high-rise has delivered the highest gross returns; mid-rise has been the most consistent middle-of-the-distribution outcome.

From Density Choice to Underwrite

The density decision sets the prototype; the prototype sets the underwriting model. An acquisitions team screening stabilized multifamily across the four density tiers needs a model that handles agency-debt sizing for garden, balance-sheet construction debt sizing for wrap and mid-rise, HUD 221(d)(4) for the underused alternative, and money-center bank construction plus mezz/pref stacking for high-rise. The capital structure varies tier-by-tier; the underwriting model has to vary with it.

On the acquisitions side, the workflow is screen-many, underwrite-few. The pocket model that handles all four density tiers without rebuild — agency, balance-sheet, HUD, and money-center execution all in the same sheet — is what turns the density choice into a five-minute screening decision. On the development side, the workflow is site-specific: which prototype, at what density, with which capital stack, at what cost basis, with what rent and exit assumption. The pro forma that handles all four density tiers on a single site with a side-by-side comparison is what turns prototype selection from a six-week exercise into a one-day decision.

Seven Mistakes Practitioners Make

• Reading 2026 economics through 2022 cost data. EVstudio's $130–190 PSF wood-frame numbers and Stryker's $150–190 garden range are correct for the 2022–2023 vintage but understate the 2026 basis by $20–45 PSF after insurance surcharges, wage inflation, and the steel-tariff overhang. Pull 2026 NMHC Quarterly Survey and current RSMeans regional cost factors before basing a development prototype decision on competitor cost tables.

• Underwriting mid-rise rents off 2018–2022 cap-rate compression. The 2014–2022 podium pencil math assumed 25–75 bps of cap-rate compression at exit and 2–4% annual rent growth. Neither is on the table in 2026. Mid-rise that worked at $190 PSF and 4.50% exit cap in 2018 needs to work at $245 PSF and 5.00–5.25% exit in 2026. The same prototype, very different underwrite.

• Defaulting to mid-rise because the zoning supports it. The "build the highest density the zoning allows" heuristic is wrong in 2026 in transitional submarkets. Garden at agency-debt economics and lower cost basis often delivers a more defensive levered IRR than mid-rise at the same site, even when zoning supports both.

• Bringing the wrong lender for the tier. Money-center bank construction lenders aren't going to underwrite a $35M garden deal at competitive terms; agency lenders aren't going to take the lease-up risk on a ground-up high-rise. The capital source map for the density tier has to be set before lender outreach starts. Garden → agency. Wrap and mid-rise → bank balance sheet or HUD 221(d)(4). High-rise → money-center bank plus mezz/pref/sovereign equity.

• Ignoring the fire-frame insurance line in wood-frame underwriting. The 15–40% premium increase that Metropolitan Risk Advisory tracks is not a 2023 anomaly; it is the new baseline. Underwriting wood-frame at 2022 insurance assumptions understates the carrying cost by 1.5–3% of total basis.

• Treating wrap and podium as interchangeable. A 4-story wrap at 50–90 UPA and a 5-over-1 podium at 80–120 UPA are different prototypes with different cost basis, different parking economics, and different exit caps. Stryker prices wrap at $225–275 PSF and podium at $300–400 PSF; the gap is real and reflects the actual structural and parking-deck differences.

• Underwriting high-rise to Sun Belt exit caps at gateway construction timelines. The 24–36 month construction period for high-rise plus 12–18 month lease-up makes the prototype most sensitive to mid-construction rate and rent shocks. Sun Belt high-rise in 2024 vintage routinely delivered into supply-wave compression and missed underwriting; the 2026 vintage that pencils is the one that underwrites to flat-to-expanding exit cap and conservative lease-up rent.

Do It in Apers

Related Articles

• Rental Property Pro Forma Calculator — the underwriting model that runs underneath every density-tier decision.
• Multifamily Development: Construction and Lease-Up — the development-side companion that walks construction execution and stabilization.
• Multifamily Underwriting Fundamentals and Rent Roll Analysis — the rent-roll mechanics that drive achievable rent PSF assumptions in this article.
• Construction Loans: Draw Schedules and Interest Reserves — the draw-schedule and capitalized-interest mechanics for any ground-up density tier.
• HUD 221(d)(4) Construction-to-Permanent Loans — the 87% LTC alternative that finances wrap and mid-rise outside the bank construction market.
• Bank Debt: Recourse vs. Non-Recourse and Covenants — the recourse mechanics that shape sponsor selection at the high-rise tier.

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