Section C: Subsidized Housing & Expiration Risk — Interactive Explorer

Mayor Mamdani's Housing Agenda · Furman Center SHD · 2026–2045

Total Units at Risk (2026–2035)iSubsidized properties whose affordability restrictions are expiring within the next 10 years, across all programs.
377,631
Subsidies expiring across all programs
421-a Units at RiskiUnits enrolled in the 421-a property tax abatement program approaching expiration of affordability covenants.
201,965
53.5% of portfolio
Peak Crisis YeariYear with the highest number of subsidies expiring, representing the greatest concentration of affordability loss.
2035
18,734 units expiring (49.1%)
Tax Delinquency RateiPercentage of subsidized properties with property tax arrears exceeding 6 months.
94.8%
421-a portfolio average
421-a Expiration Timeline (2026–2035)iYear-by-year breakdown of 421-a units losing affordability restrictions, showing when expirations peak.
Cumulative Units Losing Subsidy (2026–2035)iRunning total of all units that lose subsidies from 2026 through 2035, showing cumulative impact.
Portfolio Composition (All Programs)iDistribution of subsidized units across all programs including 421-a, J-51, Mitchell-Lama, LIHTC, Section 8, and NYCHA.
421-a by BoroughiNumber of 421-a properties and units in each borough, showing geographic concentration of affordability risk.
J-51 Expiration RoadmapiJ-51 tax abatement units grouped by expiration windows, indicating future affordability loss timeline.
Detailed Expiration Schedule & Risk Assessment (421-a)iYear-by-year breakdown with property counts, units, violations, tax delinquency, and risk classification for 421-a expirations.
Year ↕ Properties ↕ Units ↕ % of Total ↕ Violations ↕ Delinquent ↕ Delinq. Rate ↕ Risk Level ↕
Data Source & Methodology

This interactive explorer presents aggregated data from the Furman Center's Subsidized Housing Dataset (2026) and NYC Department of Finance property tax records. All figures represent nominal counts as of Q2 2026. Expiration timelines reflect contractual obligation dates and may differ from actual affordability loss dates due to renewals, modifications, or policy interventions. Borough-level data aggregates properties by primary location. Tax delinquency percentages reflect properties with outstanding property tax arrears exceeding 6 months. For policy analysis, cross-reference with official NYCHA, HPD, and Department of Finance filings. This explorer is provided for informational purposes and should not be construed as investment or policy advice. This document was produced using Claude, an AI assistant by Anthropic, using datHere's qsv Cowork plugin. Content should be reviewed for accuracy.