Does my project need a DOB permit?
DOB publishes a "Does my project require a permit?" guide. In general terms:
| Usually needs a permit | Often does not (confirm with DOB) |
|---|---|
| Structural changes — removing or altering walls that carry load, new openings, beams | Painting, wallpaper and plastering |
| New or relocated plumbing, gas and most electrical work (filed by licensed trades) | Replacing finish flooring and cabinets in the same layout |
| Changes to egress, occupancy or use — including new apartments or ADUs | Minor repairs that do not affect structure, egress or fire safety |
| Additions, decks, new roofs with structural work, façade work | Like-for-like replacement of some fixtures |
The line between "minor alteration" and permitted work depends on details — when in doubt, ask a Registered Design Professional or DOB before starting.
Who files: Registered Design Professionals and licensed trades
For permitted alterations to 1–2 family buildings, the owner must hire a Registered Design Professional (a New York State-licensed architect or professional engineer) to prepare and file plans before work begins. Licensed master plumbers and electricians file the permits for their own trades. The general contractor doing residential work must hold a DCWP Home Improvement Contractor license — see our licensing guide.
The DOB permit filing process
- Design and filing: your design professional prepares drawings and files the job in DOB NOW.
- Plan review: DOB reviews the plans (some filings can be professionally certified, which shortens review but invites audits).
- Permit: after approval, the permit is issued to the contractor, who must post it at the site.
- Inspections: required inspections during construction, then sign-off to close the job.
- Sign-off and records: keep the sign-off paperwork; open permits can complicate sales and refinancing.
Asbestos requirements before permits
DOB requires an asbestos assessment for many alteration and demolition filings before permits are issued. The assessment is performed by a certified asbestos investigator and documented on DEP forms; if asbestos-containing material will be disturbed, abatement must be handled under DEP rules first. Older buildings — especially those with original pipe insulation, floor tile or plaster — should plan for this step early.
Tips for homeowners
- Search your property's DOB record for open permits and violations before you buy or design.
- Budget time for plan review, especially if your project also needs LPC or co-op approval.
- Do not let a contractor "skip the permit" — unpermitted work can be ordered removed and can affect insurance and resale.
- Estimate project size early with our construction cost calculator.
This guide summarizes official rules for general information. It is not legal advice. Rules and fees change — confirm with the agency before you act.
Frequently asked questions
Can a homeowner file for a DOB permit themselves?
For permitted alterations to 1–2 family homes, the owner must hire a Registered Design Professional to file plans. Trade permits are filed by licensed plumbers and electricians.
Do I need a permit to renovate a kitchen in NYC?
A cosmetic refresh usually does not, but moving plumbing or gas lines, adding circuits, or removing walls typically does. Confirm with DOB guidance or a design professional.
What is DOB NOW?
DOB NOW is the Department of Buildings' online system for filing jobs, permits and many other requests.
Why does my job need an asbestos form?
DOB requires an asbestos assessment for many alteration and demolition filings so asbestos is identified and handled before work disturbs it.
