Unpermitted Work
Unpermitted work means changes to a home or building that were done without the required permit from the NYC Department of Buildings (DOB*). This can include renovations, additions, layout changes, or plumbing, electrical, or other system upgrades when a permit is required.
Why It Matters
Unpermitted work can create safety risks, especially when it involves wiring, structural changes, plumbing, or other building systems. It can also create problems when you try to sell or refinance a property, because buyers, lenders, or attorneys may ask for proof that the work was legally filed and approved.
The DOB may issue violations, stop-work orders, civil penalties, or require corrective work before the issue is resolved. Penalties can vary by building type and job conditions, so homeowners should confirm the current requirements with a licensed professional or directly with DOB.
Common examples of unpermitted work
- Adding a room, deck, or extension without required DOB permits or sign-off.
- Making electrical, plumbing, or HVAC changes without required permits.
- Removing or adding walls, changing room layouts, or replacing a roof when a permit is required.
How to check and fix unpermitted work
- Check your property’s DOB records online using BIS or DOB NOW, or call 311 for help.
- If you find unpermitted work, speak with a licensed design professional or contractor about filing for a retroactive permit.
- Be prepared to pay civil penalties and inspection fees and to correct any unsafe conditions found by DOB.
Common examples of an unpermitted sign
A related issue is an unpermitted sign, which is a sign installed without required DOB permits and approvals. See more below.
- A large advertising sign on a building wall installed without any DOB sign permit.
- A rooftop billboard placed on an apartment building without DOB approval.
- A projecting sign over the sidewalk (for a store or restaurant) put up without permits.
- A sign in a residential zoning district that is too large or used for business advertising without DOB authorization.
NEXT STEP
See how unpermitted conversions look in real NYC examples
Good to know
This page is for general education only and is based on public New York City sources when available. Some technical and legal terms are simplified into plain English to help homeowners and ESL readers. It is not legal advice, and it does not replace guidance from a licensed professional. NYC construction and safety rules change often, and your project may have extra DOB*, OSHA*, or local requirements. Before you start work, always check current rules with a licensed design professional or directly with the NYC Department of Buildings.
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If you see any capital letter abbreviations on this page or in an official letter you received from the city and you do not understand them, you can try to look them up on our NYC Violation Codes HUB page with the search tool.
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