Do I need a permit? NYC renovation and electrical permits explained
Updated October 24, 2026
In short
Painting, flooring and like-for-like replacements usually don't need a permit in NYC. New wiring, moving plumbing or gas, removing walls and structural work do, and they must be filed by licensed professionals.
Usually no permit
The Department of Buildings (DOB) treats small cosmetic work as ordinary repairs. A co-op or condo may still want to approve it.
Electrical work is different: in NYC, even small electrical jobs must be done by a licensed electrician.
- Painting, plastering and wallpaper
- New flooring and tile without moving plumbing
- Replacing cabinets and countertops in the same place
- Swapping a faucet or toilet for a similar one
Permit needed
- Electrical work beyond simple replacements: new circuits, panels, service upgrades, EV chargers, solar. A licensed master electrician files it through DOB NOW: Electrical.
- Plumbing or gas work that adds or moves piping. A licensed master plumber files it; small jobs may use a Limited Alteration Application.
- Removing or adding walls, changing the layout, or structural repairs. A registered architect or professional engineer files drawings through DOB NOW: Build.
- Converting a basement or attic to living space, or changing a building's use.
Landmarks and buildings
If your building is a landmark or in a historic district, exterior work and some interior work also need approval from the Landmarks Preservation Commission.
Co-op and condo boards have their own approval process on top of any DOB permit.
Long Island
In Nassau and Suffolk, permits come from your town or village building department, and electrical work is inspected by an approved electrical inspection agency. Rules differ from town to town, so check before work starts.
Why it matters
Work without a permit can lead to violations, stop-work orders, insurance problems and delays when you sell or refinance. A contractor who offers to skip the permit to save money is passing that risk to you.
Questions
Who files the permit?
Licensed professionals do: a master electrician for electrical work, a master plumber for plumbing and gas, and an architect or engineer for alterations. Your contractor coordinates it.
How long do permits take?
Simple electrical and plumbing permits can be quick. Jobs that need drawings and DOB review take longer, often several weeks. Ask for a timeline with your estimate.
Does a contractor need a license for home improvement work in NYC?
Yes. Contractors doing home improvement work on homes and apartments in NYC need a Home Improvement Contractor license from the Department of Consumer and Worker Protection. You can look up the license online.
General information, not legal or engineering advice. Rules change and every building is different. Check with the Department of Buildings, your town or your building management.