One of the most common questions we get from NYC homeowners: do I need a permit for this project? The answer depends on what you are doing, where you are doing it, and how your building is classified.

Here is a practical guide to renovation permits in New York City for 2026.

Projects That Typically Require a Permit

Any structural work. Removing or modifying load-bearing walls, adding new openings, reinforcing beams — anything that changes the structural integrity of the building requires a DOB (Department of Buildings) permit and usually requires plans filed by a licensed architect or engineer.

Electrical work beyond basic replacements. Adding new circuits, moving electrical panels, rewiring a room, or upgrading your service panel all require electrical permits. Swapping a light fixture or outlet does not.

Plumbing modifications. Moving a sink, toilet, or shower to a new location requires a plumbing permit. Replacing fixtures in their existing locations usually does not.

Gas line work. Any modification to gas lines — moving a stove, adding a gas dryer hookup, or extending gas service — requires a permit and must be done by a licensed plumber.

New bathrooms or kitchens. Adding a bathroom or kitchen where one did not exist before requires permits for plumbing, electrical, and potentially structural work.

Window replacements. In most cases, replacing windows in an NYC building requires a DOB permit, especially in buildings over 3 stories.

Projects That Usually Do Not Require a Permit

Cosmetic updates. Painting, wallpapering, installing new flooring over existing subfloor, and replacing cabinet hardware are cosmetic changes that do not require permits.

Like-for-like replacements. Replacing a toilet with a new toilet in the same location, swapping a faucet, or replacing a light fixture are maintenance items — no permit needed.

Cabinet replacement. Removing old kitchen or bathroom cabinets and installing new ones in the same configuration typically does not require a permit, as long as you are not modifying plumbing or electrical.

Minor drywall repair. Patching holes, skim coating, and minor drywall work are maintenance tasks that do not require permits.

Co-op and Condo Alteration Agreements

Even if your project does not require a DOB permit, your building almost certainly requires an alteration agreement for any renovation work. This is separate from city permits — it is your building management or board approving the work.

Alteration agreements typically require:

• Detailed scope of work
• Contractor insurance certificates (general liability + workers comp)
• Security deposit (often $5,000-$25,000 for major renovations)
• Restricted work hours (typically 9 AM – 5 PM weekdays)
• Neighbor notification
• Licensed architect plans for major work

The board approval process can take 2-8 weeks. Start early — this is one of the biggest sources of delay in NYC renovations.

What Happens If You Skip the Permit?

Unpermitted work in NYC creates real problems:

Fines. The DOB can issue violations ranging from $800 to $25,000+ depending on the severity. Active construction without a permit can result in a stop work order and daily penalties.

Sale complications. When you sell your apartment, unpermitted work shows up during inspections and title searches. Buyers and their lawyers will flag it, and it can delay or kill a sale.

Insurance issues. If unpermitted work causes damage — a fire from bad wiring, a flood from improper plumbing — your insurance company may deny the claim.

Building liability. Your co-op or condo board can require you to undo unpermitted work at your expense, even years after completion.

How We Handle Permits

At MH Construction, we handle the permit process for our clients. We work with licensed architects and engineers when required, file the necessary applications with the DOB, schedule inspections, and coordinate with your building management on alteration agreements.

We build permits and approval timelines into our project schedules from day one — no surprises, no delays from paperwork we should have filed weeks ago.

How Long Does the Permit Process Take?

Permit timelines in NYC vary by project complexity. Simple Alt-2 filings (no change to use, egress, or occupancy) can be approved in 2-4 weeks through professional certification. More complex Alt-1 filings that involve structural changes, new plumbing risers, or fire safety modifications can take 4-12 weeks and may require DOB plan examiner review.

Building alteration agreements add another layer. Co-op boards typically meet monthly, so timing your submission to catch the next board meeting can save weeks. Some buildings use management companies that can expedite approvals for straightforward projects.

The key is starting the permit and approval process early — ideally 6-8 weeks before your desired construction start date. Many NYC renovations are delayed not by construction, but by paperwork that should have been filed sooner. Learn more about the complete renovation timeline in our guide to gut renovations in NYC.

For advice on finding the right contractor to manage permits and construction, read how to choose a general contractor in NYC.

Need Help With Permits? We Handle Everything.

At MH Construction, permits are part of our service — not an afterthought. We manage the entire process from filing to final inspection. Call (718) 207-7624 or contact us for a free consultation.