Build-to-Rent: Where Institutional Capital Is Going
Permit data through Q4 2025 shows single-family-rental (SFR) and build-to-rent (BTR) activity concentrating in eight sunbelt + mountain metros. Permits in those eight metros rose 34% YoY, versus +4% for the national SFR market. We estimate the BTR segment will add approximately 142,000 units to the national SFR stock over 2026–2028, a ~0.8% increase in rental SFR supply per year, and model the implied rent-growth drag at 45–80bp annually in the top-5 absorbing metros. Secondary markets (Boise, Colorado Springs, Charleston) show accelerating permit trajectories and are likely to enter the top-10 within two years.
1. Scope
We define build-to-rent as single-family construction pre-committed to rental operation, identifiable in Census BPS data by the presence of ≥10-unit "single-family" filings at one address. This catches most true BTR communities (which cluster homes under one operator) while excluding ordinary rental detached-home builds. The sample runs Q1 2020 through Q4 2025.
2. Where the capital went
Eight metros dominate the BTR permit distribution. Together they account for 62% of identified BTR filings over 2022–2025 despite housing only 11% of the US SFR stock.
| Metro | 2022–25 BTR permits | Share of national BTR | Share of SFR stock |
|---|---|---|---|
| Phoenix-Mesa-Chandler | 18,400 | 14.2% | 2.1% |
| Dallas-Fort Worth | 16,100 | 12.4% | 3.0% |
| Atlanta-Sandy Springs | 11,800 | 9.1% | 1.9% |
| Houston-The Woodlands | 9,200 | 7.1% | 2.3% |
| Tampa-St. Petersburg | 8,100 | 6.2% | 1.0% |
| Charlotte-Concord | 7,400 | 5.7% | 0.9% |
| Austin-Round Rock | 5,200 | 4.0% | 0.6% |
| Jacksonville | 4,500 | 3.5% | 0.5% |
| Other 376 metros | 49,300 | 37.8% | 87.7% |
3. Drivers
3.1 Cap-rate spread vs multifamily
BTR cap rates compressed by 110bp from 2020 to 2024, landing approximately 40bp above comparable class-A multifamily in sunbelt metros. That spread — combined with the operational ease of building detached single-family product where zoning allows — explains most of the capital flow at the portfolio-allocator level.
3.2 Demographic pull
Net domestic migration into the top-8 metros averaged 68k annually per metro over 2022–2025, versus -12k average for the bottom quartile of US metros. Migrants skew toward household formation age (25–44), which favors single-family rental demand specifically.
3.3 Capital deployment cycles
Institutional allocator surveys (IPE, Preqin aggregates) show BTR moving from ~2% of US real-estate fund allocations in 2019 to ~9% in 2025. A plausible 2027 target of 12–14% implies another ~$28B of equity commitments, which at typical 60:40 debt:equity and $300/sqft avg BTR cost translates to ~135k additional units by 2028.
4. Supply impact
At forecast pace, BTR will add ~142k units nationally through 2028 — a meaningful 0.8% of SFR stock annually. But the impact is highly local: the top-5 absorbing metros take 60% of that volume, so their annual SFR-stock increase is closer to 3.2%.
5. Where next?
Using a logit model that predicts BTR-concentration rank from (population growth, job growth, land-available, zoning permissiveness, existing SFR/multifamily ratio), we identify three secondary markets with high 24-month probability of entering the top-10: Boise City (72%), Colorado Springs (66%), Charleston (61%). Operators are already reportedly assembling parcels in all three.
6. Risks + caveats
Three. First, our BTR identification is imperfect — some 10+ unit single-family filings represent traditional subdivisions the builder plans to sell. We estimate this over-counts true BTR by 10–15%. Second, the elasticity estimate (-0.4% rent per 1% stock) has a wide confidence interval (-0.2 to -0.6); supply responses depend on local demand elasticity. Third, policy can rapidly change the trajectory — e.g. state-level restrictions on institutional SFR ownership (proposed in several states) would cut the pipeline.
References
- [1]Census Building Permits Survey, monthly, ingested via etl-census.
- [2]Domestic migration estimates from ACS 5-year and IRS Statistics of Income county-to-county flows.
- [3]Preqin 2025 Real Estate Institutional Investor Allocations Report; IPE 2024 Real Estate Annual Survey.
- [4]Elasticity midpoint from Hansen (2021) and Diamond-Gyourko (2023). Local variance estimated by re-invest team.