
Multifamily Starts Hit 55,000 in Q1 2026 — Lowest Quarterly Level Since 2011
Apartment starts fell to ~55,000 units in Q1 2026 — a decade low and 73% below the early-2022 peak — per CoStar's project-level data. Under-construction stock is melting fast.
The Data

55,000 units. That's how many multifamily starts the country logged in Q1 2026, per CoStar's project-level apartment data — the lowest quarterly figure since 2011 and a 73% drop from the early-2022 peak (Multifamily Dive coverage of the CoStar/Apartments.com May 2026 report).
The under-construction stock is melting at the same time. National 5+ unit projects in progress fell to roughly 579,000 units, down more than 50% from the early-2023 peak and broadly back to mid-2010 levels. Deliveries — completions hitting the market — are off 26% over the trailing four quarters from a multi-decade high in 2024.
Grant Montgomery, CoStar's national director of U.S. multifamily analytics, attributed the pullback to "weaker rent growth and higher financing costs weigh[ing] on project feasibility."
The Context
The CoStar print runs against the headline narrative from federal permitting data. The Census Bureau's New Residential Construction series showed 5+ unit starts up 13.5% YoY in March on a seasonally adjusted annualized basis — and NAHB Chief Economist Robert Dietz earlier called January's 56.9% YoY surge "what appears to be an unsustainable high annualized pace." The two series diverge by design: Census BPS draws from a permitting survey converted to annualized rates, while CoStar tracks individual projects through their lifecycle. Over multi-quarter windows they tend to point the same direction.
Yesterday's REI Prime brief on Q1 2026 permit divergence covered the single-family / multifamily split inside the Census data. The CoStar report is the project-tracking counterpart: the pipeline that permits eventually feed.
Markets with the heaviest current exposure — Miami and Charlotte, both with more than 6% of existing inventory under construction — are still absorbing the 2024 delivery wave. Norfolk and Memphis sit below 1%. As Montgomery put it, the contraction "points to more balanced supply conditions ahead."
Also Moving
- Q1 down payments fell to $23,400. Realtor.com reported the fourth consecutive quarterly decline in the typical down payment — 19% below Q1 2025 — alongside a rising share of government-backed loans (Scotsman Guide).
- New-home mortgage applications turned negative. The MBA Builder Application Survey showed April applications down 2.4% YoY and 10% MoM — the first annual decline since October 2025 (Scotsman Guide).
- NYC revived the COPA bill. Mayor Zohran Mamdani is backing a narrowed version of the Community Opportunity to Purchase Act, giving nonprofits first rights on distressed multifamily before open-market sale (CRE Daily).
What to Watch
Three signals over the next 30 days:
- Mid-June Census BPS release for May 2026 5+ unit permits (Census Building Permits Survey). Whether the Census-CoStar gap narrows tells whether the project-level slowdown is reaching permit data.
- Mid-July FOMC meeting. Rate path matters directly for multifamily project feasibility — Montgomery cited financing costs as the primary headwind.
- Q2 2026 CoStar delivery data in August. The 26% four-quarter decline from the 2024 peak is the metric for when the under-construction stock finishes drawing down.
Data sources: Multifamily Dive, Census Building Permits Survey, Census New Residential Construction, FRED UNDCON5MUSA.
The National Association of Home Builders (NAHB) is the largest U.S. trade association for single-family and multifamily home builders — a 140,000-member organization that publishes the monthly Housing Market Index, Housing Starts commentary, and New Home Sales analysis.
Read definition →BPS is the Census Bureau's monthly survey of residential building permits issued by local permit-issuing jurisdictions — the source of every county and metro permit count used in real estate supply analysis.
Read definition →CES is the BLS monthly survey of business payrolls that produces nonfarm employment counts at the national, state, and metro level — the establishment-based counterpart to LAUS unemployment data.
Read definition →NAR is the largest U.S. real estate trade association — 1.5 million REALTOR® members — that governs the MLS system, publishes the monthly Existing Home Sales report, owns Realtor.com, and whose 2024 settlement reshaped how buyer agents get paid.
Read definition →Rent is the periodic payment a tenant makes to a landlord in exchange for the right to occupy a property -- the single revenue line that funds your mortgage, expenses, and profit as a rental property investor.
Read definition →A multifamily property is any residential building containing two or more separate dwelling units under one roof — from a side-by-side duplex to a 300-unit apartment complex — where each unit has its own kitchen, bathroom, and entrance, and each unit generates independent rental income.
Read definition →Sophia Warren
Residential Investment Analyst & News Editor
My realm is residential real estate investment, with a knack for spotting gems in emerging markets. I also edit the REI Prime daily news desk, where I translate federal data releases and operator signals into actionable briefs for small investors. Beyond properties, my world blooms in urban gardens and thrives in crafting stylish interiors.
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