The NYC and New York State programs that drive what gets built, converted, and preserved — and how each deal pencils. Figures are researched against statute and official sources; confirm specifics with counsel before relying on them.
467-m (Affordable Housing from Commercial Conversions)
Conversion tax exemptionNY Real Property Tax Law §467-m
Active — conversions must commence on or before June 30, 2031 and complete by December 31, 2039
A multi-decade real-property tax exemption for converting non-residential buildings (typically obsolete or vacant office) into rental housing that includes permanently affordable units. Enacted in the 2024 New York State budget (Chapter 56 of the Laws of 2024), it is the modern successor to the 1990s 421-g Lower Manhattan conversion program.
- Exemption length is tiered by when the conversion commences: 35 years if commenced by June 30, 2026; 30 years if by June 30, 2028; 25 years if by June 30, 2031.
- At least 25% of the resulting units must be affordable, with at least 5% reserved for households at or below 40% of Area Median Income (AMI).
- Affordable units carry a weighted-average cap of 80% AMI across no more than three income bands, none above 100% AMI.
- Affordability is permanent — the restrictions run in perpetuity, a key distinction from earlier conversion programs.
- Available citywide, but a richer benefit applies to the 'Manhattan prime development area' — tax lots located entirely south of 96th Street.
- Eligible buildings must be rental multiple dwellings with 6 or more units; up to 3 years of construction-period exemption is available.
Example: 6 East 43rd Street — Vanbarton Group's $135M acquisition to convert into 441 apartments (111 affordable), one of Manhattan's largest 467-m conversions, financed by a $300M Brookfield construction loan.
485-x (Affordable Neighborhoods for New Yorkers)
New-construction tax exemptionNY Real Property Tax Law §485-x
Active — the replacement for 421-a for new multifamily construction
A property-tax exemption for NEW multifamily rental (and some homeownership) construction that includes permanently affordable units, with construction-wage requirements on larger projects. Enacted April 2024 (Chapter 56 of the Laws of 2024) as the successor to the lapsed 421-a program.
- Exemption term scales with project size — roughly 40 years for the largest projects (150+ units), 35 years for mid-size, down to 10 years for the smallest.
- Affordability requirements range from 20% to 25% of units, at weighted-average AMI of 60%–80% depending on the option, and are permanent.
- Projects of 100+ units carry minimum construction-wage requirements; the highest wage floors apply in 'Zone A' (Manhattan below 96th Street plus select Brooklyn/Queens areas). Projects under 100 units have no wage requirement.
- Distinct from 467-m: 485-x covers ground-up new construction, while 467-m covers conversion of existing non-residential buildings.
421-a (Affordable New York Housing Program)
New-construction tax exemption (legacy)NY Real Property Tax Law §421-a(16)
Closed to new projects — lapsed June 15, 2022; now a completion-only regime
The legacy new-construction multifamily tax exemption that, for years, was the dominant incentive behind NYC rental development. It stopped accepting new projects in 2022 and was replaced by 485-x in 2024; only grandfathered projects racing to completion deadlines remain.
- Grandfathered projects generally had to commence construction on or before June 15, 2022.
- General completion/vesting deadline is June 15, 2026; an extended June 15, 2031 deadline applies only to projects that timely filed a Letter of Intent with HPD by September 12, 2024.
- Its 2022 lapse and 2024 replacement by 485-x frame the entire current NYC incentive landscape.
J-51 (Affordable Housing Rehabilitation Program)
Rehabilitation tax abatement & exemptionNY RPTL §489 / NYC Admin. Code (J-51)
Active — reinstated by the NYC Council in December 2024
A tax abatement (and limited exemption) for the renovation and rehabilitation of existing residential buildings, now rebranded the Affordable Housing Rehabilitation Program and tied to affordability and tenant-protection conditions. Distinct from 467-m, which covers commercial-to-residential conversion.
- Provides an abatement of up to 8⅓% of certified reasonable renovation cost per year, for up to 20 years, capped at 70% of certified costs.
- Eligibility is gated on affordability — a majority of units must be qualifying affordable rental units registered with the State, subject to HPD's final rules.
- Often layered with rent-stabilization rules to produce low effective property-tax exposure on multifamily portfolios.
ICAP (Industrial & Commercial Abatement Program)
Commercial/industrial tax abatementNYC RPTL §489-aaaaaa et seq. (administered by NYC Dept. of Finance)
Active — extended to March 1, 2030
Abates the INCREASE in real-property taxes attributable to construction, modernization, expansion, or improvement of industrial and commercial (non-residential) buildings. It is the commercial/industrial analog to the residential housing incentives, and the successor to the older ICIP.
- Abatement terms range from 8 to 25 years depending on geography and use, with industrial work on the longest (25-year) schedule.
- Requires a minimum investment of at least 30% of the property's taxable assessed value within 4 years of construction start.
- New commercial construction is excluded in the prime Midtown/Downtown core (generally south of and including 96th Street down to the Lower Manhattan core); renovation is excluded between 59th and 96th Streets.
- Applies where the residential programs (421-a, 485-x, 467-m, J-51) do not — relevant to commercial repositioning rather than housing.
421-g (Lower Manhattan Conversion — historical)
Conversion tax incentive (historical)NY RPTL §421-g
Expired — closed to new projects after 2006
The 1995–2006 incentive that drove the first wave of Lower Manhattan commercial-to-residential conversions, repopulating the Financial District after business hours. It is the direct historical precedent for 467-m.
- Offered a construction-period exemption plus a roughly 14-year abatement of about 80% of pre-conversion taxes, for buildings south of Murray Street, City Hall, and the Brooklyn Bridge.
- Converted roughly 13 million square feet and created over 12,000 units between 1995 and 2006.
- Units became rent-stabilized for the benefit period but, unlike 467-m, affordability was not permanent — a key 'lessons-learned' contrast.
City of Yes for Housing Opportunity
Citywide zoning reformNYC Zoning Resolution text amendment (not a tax program)
In effect — enacted by the NYC Council December 5, 2024
The most comprehensive NYC zoning reform in roughly 60 years. It is the 'where you can build or convert' that complements the tax incentives' 'how it pencils' — pairing conversion zoning relief with 467-m, and density/affordability bonuses with 485-x.
- Universal Affordability Preference (UAP): allows at least 20% additional residential floor area in medium- and high-density districts when the bonus floor area is affordable (around 60% AMI) or supportive housing.
- Parking mandates: eliminated across a wide area of the city and reduced or unchanged elsewhere, on a three-tier geographic basis.
- Conversions: broadened and simplified the rules so vacant offices and other non-residential buildings can convert to residential more easily — working in tandem with 467-m.
- Accessory Dwelling Units (ADUs) and Town Center / transit-oriented development: permits backyard cottages and basement apartments in low-density areas, and apartments above commercial corridors and near transit.
