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Multi-Family
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Feasibility Study
- 2026
Written by Ryan Butler
If you want one number that captures where real estate development is heading, look at floor area ratio.
TestFit data in the Q3 2026 edition of The Deals Developers Are Analyzing Today shows the pipeline flattening across every asset type:
Nearly half of every site developers test today is a low, spread-out project. The mid-rise and high-rise middle of the market has been cut almost in half.
These shifts happened over two years, from Q3 2024 to Q3 2026. The report describes Q3 as extending a two-year trend toward lower-intensity, more horizontal projects across every asset class.
The same pattern shows up inside residential. Higher-density multifamily fell from 61.6% to 45.2% of residential runs, the first time it has dropped below half in the dataset. Garden-style projects rose to 10.3%, their highest level yet.
Floor area ratio is the total building floor area divided by the site area. A one-acre site with a 43,560 square foot building has a FAR of 1.0. That building could be one story covering the whole lot, or four stories covering a quarter of it.
FAR is useful as a pipeline signal because it cuts across asset types. Whether the project is housing, retail, or industrial, a low FAR means a horizontal project and a high FAR means a vertical one.
Zoning codes usually set a maximum FAR. That number tells you what a site is allowed to hold. It does not tell you what a site should hold, and that gap is where today's feasibility work happens.
Projects under 0.5 FAR include most of the formats gaining ground right now:
These projects use more land per square foot of building, but they are simpler and faster to build, and they often need no structured parking at all.
Retail shows how far this has gone. The report found the median retail lot tested grew from 4.1 to 6.3 acres. Median building area grew from 74,000 to 117,000 square feet. Developers are testing bigger sites with more room for surface parking and pads.
On these projects, the value comes from the site plan. Where the buildings sit, how cars circulate, and how many stalls fit on grade decide whether the deal pencils.
The pipeline is flattening for a clear reason. Building and financing each additional floor costs more than it used to, and fewer deals generate enough revenue to justify that premium.
Going vertical brings costs that horizontal projects avoid:
In a market with high hard costs and soft rents in many metros, the extra revenue from a taller building often does not cover those added costs.
Parking makes the math harder. The report found median parking ratios for higher-density multifamily rose from 1.08 to 1.22 stalls per unit between Q1 and Q3 2026. Operators are adding stalls to compete for renters during lease-up.
More stalls per unit on a dense project means a bigger garage. On a horizontal project, the same stalls often go on grade at a fraction of the cost.
Here is an illustrative example. The site and assumptions are hypothetical, chosen to show how the math works.
Take a hypothetical 4-acre site. Four acres equals 174,240 square feet. Assume each apartment averages 1,000 gross square feet, and surface parking takes about 350 square feet per stall including drive aisles.
Scheme A, garden-style. Three-story walk-up buildings with a 26,000 square foot total footprint give 78,000 gross square feet. That is a FAR of about 0.45 and about 78 units. At 1.5 stalls per unit, the scheme needs 117 stalls, or about 40,950 square feet of surface parking.
Scheme B, mid-rise. At 2.5 FAR, the site holds 435,600 gross square feet, or about 435 units. At the report's 1.22 median ratio, that is about 531 stalls. Surface parking for 531 stalls would need about 185,850 square feet, more than the entire site.
Scheme B delivers more than five times the units. It also triggers a garage, a heavier structure, more vertical circulation, and a longer schedule. Whether those extra units cover those costs depends on local rents, construction pricing, and debt terms.
That is the point. Neither scheme wins by default. The answer comes from testing both, plus the options in between, against real costs.
A few habits make that test sharper:
For developers, land with room to spread out becomes more valuable, and dense infill sites need sharper analysis to prove they work. The opportunity is finding the FAR that maximizes return on each site, not the FAR the zoning allows.
Developers who can quickly show a lender a horizontal scheme and a vertical scheme on the same parcel have an edge. So do those who can show a land seller why their offer reflects the buildable reality, not the zoning maximum.
For architects and planners, project mix shifts toward site planning, horizontal residential, and retail. Early feasibility becomes more important, since site layout drives more of the value on a low-FAR project.
Firms that can turn around fast, credible feasibility studies win more early work. That early work often leads to the full design commission.
For cities, zoning reforms aimed at higher density may see less uptake until the cost of building vertically comes down. Policy that lowers the cost of each added floor may matter as much as policy that allows it.
The report notes that Kansas City eliminated parking minimums in its core this spring, and several states introduced reform bills. None of that has shown up in underwriting yet. Cities that pair upzoning with lower parking and construction costs give vertical projects a better shot.
It means the building floor area is less than half the site area. A one-acre site under 0.5 FAR holds less than 21,780 square feet of building. Typical examples are suburban retail, single-story industrial, and townhome or build-to-rent communities.
Each added floor costs more to build and finance than it did five years ago. Higher parking ratios add garage costs on dense projects. Fewer deals generate enough revenue to cover those premiums.
Not by default. The maximum FAR is a ceiling, not a target. Test several heights and building types, then compare yield and cost per unit to find the FAR that delivers the best return.
It could if construction costs, rates, or parking requirements fall. Rerunning feasibility as conditions change helps you spot the moment vertical projects start to pencil again.
The best FAR is a design question and a financial question at once. To find it, developers should:
TestFit data shows the pipeline flattening months before it shows up in construction starts. That is because developers test sites in TestFit before they buy them. More than 100,000 site analyses ran on the platform last quarter, across residential, retail, industrial, and mixed-use, and Thesis Driven has tracked that activity with us for nine consecutive quarters.
For more than a decade, TestFit has been the feasibility platform developers use to decide which sites to pursue. Each analysis reflects a real decision about a real site. Together, they form a live read on where development is heading.
That breadth is what makes TestFit the authority on where development is heading, and the best place to test where your site should land on the FAR curve:
TestFit calculates, it does not guess. When every floor has to earn its place, you need to see the numbers for every option.
Responsive parking lays out stalls and drive aisles as surface, structured, or tuck-under, and updates as the massing changes. That makes the parking tipping point visible on every scheme.
The results show up in the work. In TestFit's 2026 ROI report, survey respondents cut feasibility time by 80%, from 11 to 25 hours per study to 0 to 5. Developers save 18 hours per feasibility study, create 5x more design iterations per site, and make go/no-go decisions 1.5x faster.
Customers see the same. Trinity Commercial Group cut site planning from 30 days to a week. Prince Property Group can create 12 schemes in one sitting and sizes up a site in 10 minutes. Sami Khoury, a principal at AC Martin, averages at least one feasibility study a day for clients.
Find the FAR that works for your site. Book a quick demo and compare horizontal and vertical schemes side by side.
Source: Thesis Driven, The Deals Developers Are Analyzing Today, Q3 2026 Edition, based on TestFit platform data.
Explore TestFit's Real Estate Feasibility Platform today.