When do you need a permit?
Cosmetic work (paint, flooring, like-for-like fixtures) generally does not require a permit.
Moving plumbing or gas, modifying walls, electrical work, or changing the layout requires NYC DOB filings.
Alt-2 vs Alt-1 filings
Alteration Type 2 (Alt-2) is the most common renovation filing — interior work that doesn't change building use or egress.
Alteration Type 1 (Alt-1) is required for change of use or major structural work and includes a Certificate of Occupancy update.
Co-op and condo board approvals
Boards require alteration agreements, architect-stamped drawings, certificates of insurance, and often a deposit.
Plan for 2–6 additional weeks beyond DOB approval.
Landmark review
In historic districts like SoHo, Greenwich Village, and parts of Brooklyn, the Landmarks Preservation Commission may need to review facade or window changes.
Frequently asked questions
Planning a renovation in NYC?
Get a free design consultation with Maison Prestige NYC — licensed and insured kitchen and bathroom remodeling contractors serving all five boroughs.