The New Code Is Now Enforced
As of March 30, 2026, every building permit application in NYC must comply with the 2025 NYC Energy Conservation Code (NYCECC). This means stricter U-factor requirements for windows and doors.
What Changed
The 2025 NYCECC introduces:
- •Tighter U-factor requirements — windows must provide better insulation than the previous 2020 code required
- •New SHGC (Solar Heat Gain Coefficient) standards — controlling how much solar heat enters through glazing
- •Project-specific fenestration calculations — no more one-size-fits-all; U-factors and SHGC are now calculated by project-specific size
- •Non-compliant specs will be rejected at DOB permit review
Who Is Affected
Every contractor filing a building permit. Whether it's new construction, gut renovation, or window replacement, the windows you spec must meet the new code.
Co-op and condo boards planning building-wide replacements should ensure their selected products are compliant before going to the board for approval.
Homeowners doing renovations that require DOB permits need compliant window specifications.
Pella's Compliance Status
Every Pella product line is fully compliant with the 2025 NYCECC:
- •250 Series (vinyl): U-factor 0.27-0.30
- •Lifestyle Series (aluminum-clad wood): U-factor 0.25-0.29
- •Reserve (premium wood): U-factor 0.24-0.29
- •Reserve Series (premium): U-factor 0.24-0.28
We provide spec sheets formatted for DOB permit submissions. Contact Ravi at (516) 604-5749 for compliant product specs.
Tax Credits Still Available
ENERGY STAR certified Pella windows may qualify for the federal Energy Efficient Home Improvement Credit (IRS 25C). Current credit percentages and annual caps are set by the IRS — confirm with your tax advisor. We supply the product certification documentation needed for IRS Form 5695 with your invoice.