Two Tax Breaks for NYC Buildings Expire June 30. Here's What You're Leaving on the Table.
If you manage or own a building in New York City over 25,000 square feet, two significant tax programs are about to disappear. Both have the same deadline: June 30, 2026. That's 76 days from today.
Most building owners we talk to know about Local Law 97 penalties. Fewer know that the federal government and the city each offer programs that can offset those penalties, sometimes by hundreds of thousands of dollars. And both programs are closing.
1. The Federal 179D Energy Deduction
Section 179D of the tax code lets building owners deduct $0.50 to $5.94 per square foot from their federal taxes when they make qualifying energy efficiency improvements. For a 100,000 sqft office building, that's $50,000 to $594,000 off your tax bill.
The catch: Congress terminated this program as part of the One Big Beautiful Bill Act (signed July 2025). Construction on qualifying work must begin by June 30, 2026. Not complete. Begin. That means breaking ground or hitting the 5% safe harbor threshold.
Who qualifies?
- Commercial buildings (offices, retail, warehouses)
- Multifamily buildings with 4+ stories
- Hotels, hospitals, schools, houses of worship
- Retrofits that achieve 25%+ energy savings vs. ASHRAE 90.1
What counts as "beginning construction"?
The IRS recognizes two tests: the Physical Work Test (actual physical work on the project has started) or the 5% Safe Harbor (you've spent at least 5% of the total project cost). Either one counts.
The prevailing wage bonus
If your contractor pays prevailing wages and meets apprenticeship requirements, the deduction jumps from $0.50/sqft to $2.97 to $5.94/sqft. That's a 4x increase. For most NYC projects, prevailing wage is already standard, so this bonus is effectively automatic.
2. NYC's J-51 Property Tax Abatement
J-51 is a city program that gives building owners a property tax reduction equal to 70% of the cost of qualifying renovations. The reduction is spread over 12 to 20 years.
For a 120-unit co-op spending $15,000 per unit on a boiler replacement, that's roughly $1.26 million in total tax relief, or about $79,000 per year for 16 years.
The deadline here is different: work must be completed by June 30, 2026. If you haven't started yet, this one may already be out of reach for large projects. But smaller scope work (boiler controls, pipe insulation, lighting) could still qualify if you move fast.
Who qualifies?
- Rental multifamily buildings
- Co-ops and condos (below the assessed value cap)
- Buildings with 3+ dwelling units
- Qualifying work: boiler, plumbing, electrical, windows, elevator
The rent stabilization trade-off
One thing to know: all rental units in a J-51 building become subject to rent stabilization for the duration of the benefit. For buildings that are already stabilized, this changes nothing. For market-rate buildings, it's a real consideration. Talk to your attorney before applying.
These two programs stack
Here's what most people miss: 179D and J-51 are not mutually exclusive. A multifamily building doing a heat pump retrofit could claim the federal 179D deduction on the same project that qualifies for J-51 city tax relief. Plus the NYC LL97 Beneficial Electrification Credit on top of that.
For a 140,000 sqft, 120-unit co-op in Manhattan, the combined value of all three programs can exceed $300,000. That's real money. And it disappears on June 30.
What to do this week
- Check your building. Use CompliantLens to see which programs your building qualifies for and what the estimated dollar amounts are. Look up your building (free).
- Book a free NYC Accelerator consultation. The city runs this program at no cost. They'll walk you through your options. Book here.
- Talk to your CPA about 179D. They need to file IRS Form 7205. If your building is planning any energy work this year, the conversation should happen now, not in December.
- Talk to your property manager about J-51. HPD needs to certify the work before you start (or in some cases, within 4 months of completion). The application is at nyc.gov/hpd.
The bottom line
These programs exist because the government wants buildings to use less energy. They're paying you to do it. But unlike LL97 penalties (which are ongoing), these incentives have expiration dates. June 30 is real, and it's coming fast.
We built CompliantLens specifically to help building owners find these programs without hiring a consultant. Look up your building, see what you qualify for, and take it from there.