Garden-style multifamily feasibility study.
The suburban workhorse — 100 to 400 units, two- to three-story walk-up, surface parking, amenity package built around pool, fitness, clubhouse, and pet park. Financed predominantly through Fannie DUS and Freddie Optigo on the conventional execution, with bank construction and life-company on adjacent pathways.
NCHMA-compliant · CoStar + Feasibility Study Consultant primary research · Agency takeout · 1,800 words
Garden-style is the structural workhorse of the U.S. multifamily market. The product class — typically 100 to 400 units per property, two- to three-story walk-up construction, surface parking, and an amenity package built around a pool, a fitness center, a clubhouse, and outdoor recreational space — accounts for the largest share of conventional multifamily inventory by unit count and the largest share of agency multifamily lending volume. The product fits cleanly inside the Fannie DUS and Freddie Optigo underwriting boxes, finances predominantly through agency permanent execution after lease-up, and develops through conventional bank construction with takeout to agency at stabilization.
A garden-style market study is built around a tight set of analytical inputs: comparable set construction drawn from five to eight in-class properties, rent comparability through CoStar and primary research, absorption forecasting against the suburban submarket's pipeline, operating expense benchmarking at suburban garden cost levels, and capture rate analysis against the trade area's net household formation. The methodology is consistent across NCHMA, agency, and conventional reviewers, with form-driven additions when HUD-FHA financing is in play.
Garden-style as the suburban workhorse.
Garden-style multifamily occupies a structural position in the U.S. housing market that no other rental product matches. The combination of suburban location, lower-density construction, surface parking, and amenity packages targeted at families and middle-income households produces a product that captures the broadest demand base in any submarket. The trade-off is that the product carries more land per unit than mid-rise or high-rise alternatives, which constrains development to suburban and exurban submarkets where land economics support the lower density.
The typical garden-style project develops on 8 to 25 acres at densities of 12 to 22 units per acre. Buildings are arranged in courtyards or linear configurations around the amenity core (pool, fitness, clubhouse), with surface parking dispersed across the site. The construction type — typically wood-frame Type V or Type IIIA — produces meaningfully lower hard costs per unit than the steel-and-concrete construction required for mid-rise and high-rise product, and the absence of structured parking removes one of the largest cost drivers in urban multifamily development.
The demand base skews suburban — families with children, working couples without children in suburban-employer markets, empty-nesters trading down from owner-occupied housing, and renters by necessity who would otherwise purchase but face affordability constraints in single-family home pricing. The income tier varies meaningfully by submarket, with Class A garden-style targeting renters at 100 to 175 percent of area median income (AMI), Class B garden-style targeting 80 to 120 percent of AMI, and Class C garden-style targeting 60 to 80 percent of AMI.
Capital cost per unit benchmarks.
Capital cost per unit for new construction in garden-style multifamily runs $180,000 to $280,000 per unit, all-in, in 2026. The range reflects geography, land cost, building specification, and amenity package across U.S. suburban submarkets.
Class A garden-style new construction in standard suburban secondary markets typically lands at $200,000 to $250,000 per unit. The product carries Type V wood-frame construction, an amenity package built around a resort-style pool, a 3,000 to 5,000 square foot fitness center, a 4,000 to 6,000 square foot clubhouse, in-unit washer/dryer, in-unit storage, structured-parking-free surface lots, and unit finishes at the upper end of the suburban tier (granite or quartz countertops, stainless appliances, vinyl plank flooring throughout, 9-foot ceilings, walk-in closets in master bedrooms).
Class B garden-style new construction typically runs $180,000 to $220,000 per unit, with reduced amenity scope (smaller fitness center, simpler clubhouse, no pet park or pet wash), lower-tier unit finishes (laminate countertops, basic appliances, mixed flooring), and tighter unit dimensions. Workforce-housing-positioned garden-style at 60 to 120 percent AMI typically lands at $160,000 to $200,000 per unit, with further amenity reduction and value-engineered unit finishes.
The cost range above $280,000 per unit indicates one of three conditions: high-cost MSA placement (California coastal, New York metro, Boston, DC, Seattle), elevated site work (steep grading, environmental remediation, structured stormwater), or an amenity and unit-finish program that exceeds the typical suburban garden tier. Each condition is documented in the cost build-up. Costs below $160,000 per unit in 2026 typically indicate either tertiary-market placement, a value-engineered prototype, or potential cost-basis underestimation that the feasibility flags for verification.
The financial projection's debt sizing test runs against the per-unit cost basis. Agency execution typically supports 70 to 80 percent loan-to-cost on the construction takeout; HUD-FHA at 85 to 90 percent under 221(d)(4) on new construction; bank construction at 65 to 75 percent of project cost during the development phase.
Demand drivers in suburban markets.
Garden-style demand in suburban submarkets derives from four structural drivers, documented in the market study against primary market area data sources.
Employment growth in the primary market area is the foundational driver. The analyst documents the trade area's employment trajectory from BLS Quarterly Census of Employment and Wages (QCEW) data, the major employers within commuting distance (typically a 30-minute drive radius from the subject), and the projected employment growth across the next 5 to 10 years from regional planning organization (RPO) and metropolitan planning organization (MPO) projections where available. Employment growth at 1.5 to 3.0 percent annually in the primary market area typically supports a meaningful incremental rental demand projection.
Household formation is the second driver. The analyst documents the trade area's household formation rate from Census ACS data, projects forward based on Esri Tapestry or comparable demographic forecasts, and segments the projection by age cohort and income tier. New household formation among 25- to 44-year-old renters is the structural anchor of garden-style demand, and trade areas with growing 25- to 44-year-old population project stronger demand than aging trade areas.
In-migration is the third driver. The analyst documents net migration into the primary market area from Census migration files, IRS migration data (which captures inter-county migration with some lag), and U-Haul or moving-company indicator data where supplemental support is needed. Markets with sustained net in-migration — particularly the Sun Belt suburbs of Atlanta, Charlotte, Raleigh, Nashville, Tampa, Phoenix, Austin, Dallas, and Denver suburbs — project structurally stronger demand than markets with net out-migration.
Affordability gap to homeownership is the fourth driver. The analyst documents the median home price in the primary market area, the qualifying income required for homeownership at current mortgage rates, and the share of trade-area households that fall below the qualifying income threshold. As the affordability gap widens — which has been the dominant trend across U.S. metros since 2020 — the structural demand for rental product expands, with garden-style capturing the demand from households that would historically have purchased a starter home.
The four drivers together produce the trade area's annual rental household demand projection at the subject's positioning tier. The capture rate analysis allocates that demand against the existing supply, the pipeline, and the subject's competitive position to produce the absorption forecast.
Comp set construction for garden-style.
The garden-style comp set typically runs five to eight competitor properties drawn from the primary market area, with selection criteria based on construction type, unit-mix similarity, amenity package, vintage, and location class. The set is larger than the four-to-seven-property convention used in hotel feasibility because the multifamily comparable universe is denser and the rent-comparability methodology benefits from a broader sample.
Vintage match is the most consequential criterion. A 2024 vintage Class A garden-style benchmarks against other 2018-and-newer Class A garden-style properties in the trade area, not against 1990s-and-older product even where unit mix and amenity package align. The vintage-adjusted competitive set captures the rent positioning the subject can sustain at delivery; older product carries structurally lower rent positioning even at comparable unit specifications because the market discounts age. Boundary cases — properties at the vintage edge of the comparable window — are documented with explicit inclusion or exclusion rationale.
Unit-mix match is the second criterion. The subject's projected unit mix (one-bedroom share, two-bedroom share, three-bedroom share, studio share where applicable) is benchmarked against comparable properties' unit mixes, with the rent-comparability analysis run unit-type by unit-type rather than at the property aggregate. A garden-style property with 60 percent two-bedroom units benchmarks differently than one with 40 percent two-bedroom units, even with the same property-level positioning.
Location-class match is the third criterion. The garden-style competitive set draws from the same submarket — typically defined by school district, primary employer cluster, retail anchor, or interstate access pattern — within a 3- to 6-mile radius of the subject in standard suburban contexts. Properties outside the submarket but at comparable position can be included with documented rationale tied to the demand-driver analysis (shared employer base, comparable school district, comparable commute pattern).
CoStar and the Feasibility Study Consultant database serve as the primary data sources for comparable property identification, rent abstraction, and occupancy trending. Primary research — direct contact with leasing offices, field verification of unit availability and rent levels, documentation of concession activity — is required for the rent-comparability conclusion under both NCHMA and HUD methodologies.
Agency permanent execution.
Fannie Mae's DUS platform and Freddie Mac's Optigo platform are the dominant permanent financing pathways for stabilized garden-style multifamily. Agency execution carries the longest-tenor and highest-leverage terms in the conventional multifamily market — typically 7- to 12-year terms, 30-year amortization on conventional execution, and 75 to 80 percent LTV — with pricing materially inside conventional bank or life-company alternatives.
The agency underwriting framework runs through approved seller-servicer lenders. Fannie's DUS lenders and Freddie's Optigo lenders originate, underwrite, and service the loans against agency-published guidelines, with the agencies guaranteeing the resulting securitizations. The seller-servicer lender bears underwriting responsibility, and the third-party market study is a primary input the lender relies on for the rent comparability conclusion, the absorption projection (on lease-up transactions), and the demand-driver documentation.
Agency DSCR thresholds in the current market run 1.20x to 1.30x at the underwriting constants, with the lower end available for stabilized assets in tier-one markets and the higher end applied in secondary and tertiary markets. Mission-driven and affordable-housing-focused executions (Fannie's MAH program, Freddie's TAH program) carry adjusted thresholds and pricing for properties serving renters at specific AMI levels.
The market study deliverable for agency execution is NCHMA-compliant and runs typically 60 to 100 pages with the standard nine-section structure. Class A and Class B+ garden-style in well-documented submarkets typically requires the lower end of the page range; mission-driven, affordable, and lease-up transactions require the upper end with extended demand-driver analysis and absorption schedules.
Bank construction with agency takeout.
The dominant development-phase financing for garden-style multifamily is conventional bank construction, with the takeout migrating to agency permanent debt at lease-up completion. The structure pairs the bank's construction execution capability with the agency's lower-cost, higher-leverage permanent terms, producing a coordinated capital structure that the developer plans for at project inception.
Bank construction loans on garden-style multifamily typically size at 65 to 75 percent of total project cost at the construction phase. The bank underwrites against the projected stabilized cash flow at the takeout's expected leverage and DSCR — meaning the construction loan's sizing is constrained by the agency's eventual underwriting bar rather than by the bank's standalone underwriting framework. Construction terms typically run 24 to 42 months from closing through stabilization, with extension options if lease-up runs longer than projected.
The market study's absorption forecast is the structural input to the construction loan's interest reserve sizing and the takeout's underwriting timeline. A garden-style absorption projection at 15 to 22 units per month produces a stabilized lease-up of 10 to 18 months from certificate of occupancy on a 200-unit project, depending on phasing — and the bank sizes the interest reserve against that projected window. Conservative absorption forecasts with explicit downside scenarios protect both the construction lender and the developer from interest-reserve depletion if lease-up runs slow.
Takeout to agency execution requires that the property reach the agency's stabilization threshold (typically 90 percent occupancy for 90 days) and that the trailing-three-month annualized cash flow support the agency's DSCR test at the takeout's loan size. The market study's projection of stabilized rents, occupancy, and operating expenses informs the developer's takeout sizing expectation, and the construction loan's structure builds the takeout assumption into the closing terms.
Amenity package and rent premium analysis.
The garden-style amenity package functions as the property's competitive positioning tool in the rent-comparability analysis. The standard Class A package — resort-style pool, fitness center, clubhouse, package room, pet park, dog wash, in-unit washer/dryer, walk-in closets, structured outdoor space — sets the baseline for Class A rent positioning in the suburban market. Properties that exceed the baseline through additional or upgraded amenity scope command a documented rent premium; properties that fall short of the baseline carry a documented rent discount.
The rent-premium analysis runs at the line-item level. A property with a coworking lounge in addition to the standard clubhouse typically commands $25 to $50 per unit per month above the comparable baseline. A property with EV charging at 25 percent of parking spaces typically commands $20 to $40 per unit per month. A property with smart-home integration (smart thermostats, keyless entry, smart locks, smart lighting) typically commands $30 to $75 per unit per month. A property with full-service package management (Amazon Hub, Luxer, or comparable) is typically considered standard rather than premium-supporting in 2026.
Unit-feature rent premiums run on a parallel track. Top-floor units with vaulted ceilings typically command $30 to $80 per unit per month above the comparable. Premium views (water, golf course, downtown skyline) typically command $40 to $150 per unit per month. Garage parking versus surface parking typically commands $75 to $200 per unit per month in markets where covered or garage parking is scarce. Specific unit-feature premiums vary meaningfully by submarket and are documented through primary research with the comparable set.
The aggregate rent-premium analysis is the structural output of the methodology. A subject property positioned $50 per unit above the comparable-set average requires explicit documentation of the amenity, unit-feature, or location factors that support the premium. A subject positioned at the comparable-set average requires no premium documentation. A subject positioned below the average should be flagged for re-examination — most positioning below the comp average reflects either a positioning error or an underlying market issue that the financial projection has to acknowledge.
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Multifamily feasibility study (pillar)
Parent pillar covering NCHMA Model Content Standards, HUD MAP forms, and the multifamily lender matrix.
Build-to-rent feasibility
Single-family detached and townhome rental product operated as a multifamily asset — the fastest-growing sub-segment.
Workforce housing feasibility
Class B garden and mid-rise targeting 60–120% AMI — agency mission-driven, HUD-FHA, and certain LIHTC structures.
Agency multifamily lending
Fannie Mae DUS and Freddie Mac Optigo — the dominant permanent financing pathway for stabilized garden-style.
Bank construction lending
Construction execution that pairs with agency takeout at lease-up completion.