Local Law 92 and Local Law 94 — Sustainable Roofing (Green Roof and Solar)

Who is covered

New construction and major roof renovations with permit applications filed on or after November 15, 2019. Covers most building types and occupancy groups.

What the law requires

• Install a qualifying sustainable roof system — green (vegetated) roof, solar PV, solar thermal, or a combination.
• Cover 100% of the available roof area (the portion not occupied by mechanical equipment, setbacks, or required code clearances).
• Include the sustainable roof plan in the DOB building permit application and obtain sign-off.

Filing frequency and deadlines

Penalty structure

Non-compliance with LL92 / LL94 can result in the following penalties:

• DOB may withhold the building permit or certificate of occupancy if the sustainable roof requirement is not met.
• Revision of construction plans may be required, adding cost and delay.

Exemptions

• R-3 occupancies (one- and two-family homes) of three stories or fewer.
• Projects with permit applications filed before November 15, 2019.

Recent updates and amendments

DOB has issued additional guidance on what qualifies as 'available roof area' and how to calculate the required coverage for combination (green + solar) installations.

Reference

Official source: NYC Sustainable Buildings — Green Roofs