The short answer: most kitchen and bathroom remodels on Long Island need at least one permit, but not all of them do. A pure cosmetic refresh (new paint, tile, countertops, cabinets, or fixtures that stay in the exact same spot) usually does not require a permit. The moment your project touches structure, plumbing, electrical, gas, or the room layout, a building, plumbing, or electrical permit is required, and the licensed contractor doing the work should be the one who pulls it. Below is how that plays out across Suffolk County, Nassau County, and New York City.
The short answer: cosmetic no, structural or system changes yes
Cosmetic work is generally permit-exempt, while anything that alters structure or building systems is not. If you are swapping a faucet, refacing or replacing cabinets in place, tiling a backsplash, or setting a new countertop, you are doing “in-kind” cosmetic work that most Long Island building departments do not require a permit for. A permit is required once you:
- Move or add plumbing (relocating a sink, toilet, or shower, or converting a tub to a walk-in shower)
- Add or move electrical circuits, outlets, or lighting
- Touch gas lines
- Remove, move, or add a wall, or change the room’s footprint
- Alter anything structural or load-bearing
Because a remodel that “looks cosmetic” can still trip a permit requirement the second a pipe or wire moves, it pays to confirm scope before demolition. This is one of the clearest reasons homeowners weigh a design-build firm versus a general contractor: a design-build team maps the permit path into the plans instead of discovering it mid-project.
Suffolk County specifics
In Suffolk County there is no single county-wide building permit for remodels: each township runs its own building department with its own rules, so requirements in Huntington, Smithtown, Babylon, and Islip are not identical.
The Town of Huntington is a good example of the standard structure. Huntington requires a building permit for “the construction, alteration, moving, repair, modification, or demolition, in whole or in part,” of a structure, a separate plumbing permit for installing, repairing, or modifying any plumbing system, and a certificate of approval from an authorized electrical inspection agency for electrical work (the Town does not inspect electrical itself). See Huntington’s Projects Requiring Permits list for the current details. Neighboring towns follow the same logic but file with their own building departments, which is why the first step on any Suffolk job is confirming which town you are in and what that town’s building department wants on paper.
Nassau County specifics
Nassau County works the same way: permits are issued at the town, city, or village level, not by the county, and most kitchen and bathroom remodels that involve plumbing, electrical, or structural work require one. Nassau County’s own Building and Zoning Permits guidance directs residents to their local building department, and towns like Oyster Bay confirm that permits are typically needed for building construction and for plumbing work such as installing a new bathroom (see the Town of Oyster Bay Building Division). Villages within Nassau can add their own layer of review, so a remodel in an incorporated village may answer to the village first. The takeaway for a Nassau homeowner is identical to Suffolk: cosmetic-in-place is usually fine, systems and layout changes are not, and the correct filing office depends on your exact address.
NYC apartments, co-ops, and condos
Inside the five boroughs, the NYC Department of Buildings (DOB) sets the rule, and co-op or condo boards add a second, separate approval on top of it. Per DOB guidance on renovating kitchens and bathrooms, you generally do not need a DOB permit to replace tile, flooring, lighting, or plumbing fixtures as long as those fixtures stay in the same location, or to swap appliances, countertops, and cabinetry without shifting their placement. Once you move plumbing, gas, electrical, or walls, DOB permits apply, and relocating or replacing plumbing lines is often filed as a Limited Alteration Application (LAA) by a licensed plumber.
The extra NYC step is your building. Co-ops and condos almost always require board approval and a signed alteration agreement before any work begins, frequently including architectural plans, certificates of insurance (COIs), and building rules on hours, elevator use, and deposits. That paperwork is exactly why NYC apartment remodels take coordination that a suburban house does not, and why we handle COIs, alteration agreements, and elevator reservations for co-op and condo clients as part of the job.
Who should pull the permit (and the red flag to watch for)
The licensed contractor performing the work should pull the permit in their own name, not you. When a licensed contractor files the permit, they are signing a legal declaration that they are responsible for code compliance and for passing inspections, backed by their license and insurance, as NYC’s own contractor permit and insurance guidance describes. When a homeowner pulls the permit instead, the homeowner becomes the party legally certifying the work and absorbing the liability if something fails inspection or causes damage.
So treat this as a red flag: if a contractor asks you to pull the permit for work they are doing, be cautious. A licensed contractor can and should file in their own name. A request to put it under yours can signal the contractor is not properly licensed to pull it, and it shifts the accountability onto you. Verifying licensing is a fair question to ask any remodeler, and one we cover on our FAQ page.
How D&V handles plans, permits, and approvals
At D&V Home Design Center, permits and approvals are built into our process, not left to the homeowner. Because our architects, designers, and craftsmen work under one roof, we prepare the drawings, determine which building, plumbing, or electrical permits your town requires, and file them under the proper licenses. We are licensed and insured across the region (Suffolk #HI-71989, Nassau #202187, NYC HIC #2100175-DCA, Westchester #WC-38277-H24, plus East Hampton, Southampton, and Shelter Island), and for NYC apartments we manage the co-op and condo alteration agreements, COIs, and elevator reservations that boards demand.
Our four-step process starts with a free consultation and general estimate, moves to an in-home visit with measurements and a structural evaluation, then a detailed line-item proposal, and finally construction under a dedicated project manager who keeps the permit and inspection schedule on track. If you are planning a kitchen or bath, see our guide to the best kitchen remodeling on Long Island or reach out through our contact page and we will walk you through exactly which permits your project needs.
Frequently Asked Questions
Do I need a permit to remodel a bathroom on Long Island?
Usually yes, if you move plumbing (like relocating a toilet or converting a tub to a shower) or change electrical or the layout. A cosmetic bathroom update that keeps every fixture in its existing spot (new tile, vanity, or a like-for-like fixture swap) typically does not require a permit. Because the trigger is whether pipes, wires, or walls move, confirm your scope with your town’s building department before demolition.
Do I need a permit to remodel a kitchen on Long Island?
Yes for most full kitchen remodels, because they usually add or move plumbing, electrical circuits, or gas, or change the layout. Replacing cabinets, countertops, and appliances in their existing locations is generally cosmetic and permit-exempt, but new circuits, a relocated sink, or a moved wall all require permits filed with your town.
Is a permit required for a cosmetic refresh?
Generally no. Painting, new flooring, tiling, refacing or replacing cabinets in place, and swapping fixtures for the same type in the same location are considered cosmetic or in-kind work that most Long Island building departments and NYC DOB do not require a permit for. The exemption ends the moment you move plumbing, electrical, gas, or a wall.
Should the homeowner or the contractor pull the permit?
The licensed contractor doing the work should pull the permit in their own name. Filing the permit makes that party legally responsible for code compliance and inspections. If a contractor asks you to pull your own permit for work they are performing, treat it as a warning sign, because it can indicate they are not licensed to file it and it shifts the liability to you.
Do I need board approval to remodel a co-op or condo in NYC?
Almost always, and it is separate from the DOB permit. NYC co-op and condo boards typically require a signed alteration agreement before work starts, often with architectural plans, certificates of insurance, and rules on work hours and elevator use. You may need board approval even for projects that do not require a DOB permit. D&V handles these alteration agreements, COIs, and elevator reservations for NYC clients.
Is the permit process different in each Long Island town?
Yes. Both Suffolk and Nassau County issue permits at the town, city, or village level rather than county-wide, so Huntington, Smithtown, Babylon, Islip, Oyster Bay, and Hempstead each run their own building department with its own forms and requirements. The correct filing office depends on your exact address, which is one reason we confirm jurisdiction before filing.
What happens if remodeling work is done without a required permit?
Unpermitted work can lead to stop-work orders, fines, and orders to expose or redo completed work, and it can create problems when you sell or insure the home. Using a licensed contractor who pulls the correct permits protects both the quality of the work and your liability, since the permitted work is inspected and documented.