For decades, 421-a was the tax incentive behind most new rental construction in New York City. It expired for new projects in 2022, and after a two-year gap the State replaced it with §485-x, the Affordable Neighborhoods for New Yorkers program. If your last project used 421-a, here’s what’s different this time.
The short version
Both programs trade a long-term property-tax exemption for affordable housing. But 485-x generally asks for deeper affordability, stronger labor standards, and longer commitments than the 421-a many developers remember.
Affordability: deeper and permanent
Under most 421-a options, affordable units could eventually be deregulated. Under 485-x:
- Affordable units are permanently affordable and registered with DHCR.
- Affordability bands are calibrated by project size and location, commonly 20%–25% of units at a weighted 60%–80% of AMI.
- The rules push toward a genuine, lasting affordable component rather than a temporary set-aside.
Labor: explicit wage requirements
421-a’s wage rules were narrower and concentrated in large Manhattan projects. 485-x builds wage requirements more directly into eligibility:
- Minimum construction wages for larger projects, scaled by size and location.
- Prevailing wages for building-service workers after completion, with carve-outs for deeply affordable buildings.
For many mid-size projects, this is the biggest financial change from the 421-a era.
Benefit terms
485-x preserves the headline appeal — a long exemption on the value created by new construction — with terms generally running 35 or 40 years plus the construction period, depending on the project. As always, the longest terms go to the largest and most affordable developments.
Timing and transition
A few practical points:
- Projects that commenced construction under valid 421-a within the transition rules may still complete under the old program — eligibility depends on specific commencement and completion dates.
- New projects starting now will generally fall under 485-x.
- The filing calendar (registration notice, application deadlines tied to completion) is strict under both, and the penalties for missing it are real.
What it means for your pro forma
The practical takeaways for a new development:
- Underwrite the deeper affordability — model the permanent rent restrictions, not a temporary set-aside.
- Budget for wages — construction and building-service wage requirements can move your numbers materially.
- Plan the lease-up early — permanently affordable units mean an HPD lottery and ongoing compliance for the life of the building.
How Sterea helps
Whether your project is finishing under 421-a or starting fresh under 485-x, the filing, the affordable lottery, DHCR registration, and ongoing monitoring all have to move in step. We handle them as one team — so the incentive you underwrote is the incentive you actually receive.
This article is for general informational purposes and is not legal, tax, or financial advice. Rules change and the specifics vary by property — consult a qualified professional about your situation.