Federal Data Misses Billions in Multifamily Development

Multifamily investors may overlook a major source of future apartment competition when analyzing the US multifamily development pipeline, reports Globe St.

A 2026 Center for Public Enterprise analysis estimates roughly 750,000 units have entitlements but lack building permits. Federal construction data largely misses these projects. That gap could make future multifamily supply look smaller than the actual development pipeline.

The Missing Stage

Federal construction statistics track projects after they enter the permitting process. However, developers often spend months or years securing land-use approvals beforehand.

Paul Williams, a Center for Public Enterprise fellow, calls this group the “shadow pipeline.” He argues that missing entitlement data creates a major blind spot for apartment investors. These approvals can include land-use decisions, environmental clearances, and planned development approvals.

Entitlements also represent a meaningful investment of developer time and capital. Developers that secure approvals have already reduced several major risks. That progress can position projects to move faster when financing conditions improve.

The Details

Williams’ 2026 analysis estimates the entitled-but-unpermitted pipeline contains roughly 750,000 units. Those projects represent an estimated $225B–$265B of development value.

For comparison, Williams identified approximately 117,000 permitted multifamily units that had not started construction. Another 1M units remained under construction. Annual multifamily permits and completions each totaled roughly 500,000 units in the data Williams examined.

The shadow pipeline therefore exceeds the authorized-but-not-started category by more than six times. That difference highlights the scale missing from conventional supply measurements.

Entitlement timelines can also stretch significantly. Williams noted that San Francisco approvals can take at least 15 months. By contrast, about 80% of multifamily projects start construction within two months after receiving permits.

A Hidden Multifamily Supply Threat

Projects between entitlement and permitting do not necessarily represent abandoned developments. Many have already cleared one of development’s most difficult hurdles.

Interest rates, construction costs, limited lending, or insufficient equity can prevent developers from advancing. Multifamily starts have already fallen sharply as financing conditions weakened.

Better economics could quickly change that equation. A decline in borrowing costs could improve project returns and reopen financing options. A decline in borrowing costs could improve project returns and reopen financing options for stalled developments.

As a result, markets with modest permitted pipelines may still face substantial future supply. Approved projects could advance quickly once financing improves. That possibility matters especially in markets where investors expect construction activity to fall sharply.

A faster supply response could also limit future rent growth. New projects would compete with existing properties for tenants once they reach completion.

Why It Matters

Apartment investors use construction pipelines to forecast vacancies, rents, competition, and property values. Missing entitlement data can therefore distort investment assumptions.

The Census Bureau’s Building Permits Survey covers roughly 900 of nearly 20,000 permit-issuing jurisdictions, according to Williams’ 2026 analysis. Moreover, national construction measures generally begin at permitting and exclude earlier entitlement activity.

CoStar, Yardi Matrix, and RealPage also monitor development pipelines. Several cities maintain detailed local entitlement records. However, no standardized national database tracks entitled housing projects under Williams’ definition.

That limitation creates challenges for investors comparing markets. Two metros can show similar permit activity while carrying very different inventories of approved projects.

Developers also face potential consequences. They could enter markets that appear undersupplied without seeing competing projects already positioned for construction.

What’s Next

Improving debt and equity markets could push some of these 750,000 units toward construction. These projects can move faster than developments starting entitlements today.

Investors should watch lending conditions, construction costs, and equity availability alongside traditional supply measures. Changes in those factors could determine when approved projects become viable.

Still, developers will not build every approved project. Some plans will change, face further delays, or disappear entirely. Local demand conditions could also prevent certain projects from securing financing.

Investors should therefore look beyond permits, starts, and construction counts when evaluating multifamily supply. Local entitlement records could reveal competition that federal data misses. Tracking that pipeline could provide an earlier signal of the next apartment construction cycle.