REMODELING PERMITS
TOWN OF ISLIP, NY

Kitchen & Bathroom Permits in the Town of Islip

Why Does the Permit Answer Change From Town to Town?

Because New York State wrote it that way. 19 NYCRR 1203.3(a)(1) requires every authority having jurisdiction to require building permits for work that must conform to the Codes. It then lets localities exempt eight categories, two of which matter here: “painting, wallpapering, tiling, carpeting, or other similar finish work,” and “repairs, provided that the work does not have an impact on fire and life safety.” The State mandates the permit for regulated work and merely permits the exemption for cosmetic work. Each of the ten Suffolk town departments decides whether to take that option. That is why the answer varies.

Most towns never write their choice down. Islip did. The Town of Islip Building Division, part of the Department of Planning and Development at One Manitton Court, publishes a document titled “When Is A Permit Required,” dated June 16, 2025, that goes scope by scope through what needs a permit. As of July 2026 it is the clearest published permit guidance we have found on Long Island, and almost nobody quotes it.

Do You Need a Permit to Remodel a Kitchen in Islip?

Start with what Islip exempts, in the Town's own words: “No permit required for finish work such as paint, wallpaper, tile, carpet, cabinets.” That sentence covers the visible half of most kitchen projects. New cabinet boxes and doors in the existing layout, a countertop on top of them, a tile backsplash, flooring and paint are finish work, and a homeowner in Bay Shore does not have to take a contractor's word for it.

Now the other side. Islip requires a permit for “Gas piping and/or new fixtures,” and adds that “Direct replacement of fixtures requires a permit if roughing / new piping is involved.” In kitchen terms: a gas line run to a range that never had one, a pot filler, a second sink in an island, or a sink relocated so the drain and vent have to be re-run. Islip also requires a permit for alterations meaning “Any change of structural elements or completing unfinished spaces,” and treats repairs as exempt except for “Removal or cutting away of a load bearing wall, partition or portion thereof, or of any structural beam or load bearing component.” Opening the wall between the kitchen and the dining room is the most common scope that trips that line.

The practical read is that the finishes are free and the mechanicals are not. The moment the island moves, the range converts to gas, or the wall comes down, you are filing.

Do You Need a Permit to Remodel a Bathroom in Islip?

The same document splits a bathroom cleanly. Retiling a shower, replacing floor tile, painting and changing a mirror are finish work under Islip's exemption. The fixtures are where it turns. Islip requires a permit for new fixtures, and for fixture replacement “if roughing / new piping is involved.” A bathroom packs more plumbing into less floor area than any other room, so that phrase does more work here than anywhere else.

Read it as a question about what is behind the wall rather than what is in front of it. A vanity set back in the same position on the existing supply and waste lines is one job. A toilet moved three feet, a second sink, or a tub replaced by a curbless shower are different jobs, because all three mean new soil, waste or vent piping. Adding a bathroom rather than renovating one can also reach the county Health Department — we cover that on bathroom remodeling in Suffolk County.

Islip Permit Triggers, Kitchen and Bathroom Side by Side

Where a scope sits on the line — the vanity row above — the determination belongs to the department, not to your contractor and not to this page. Islip's Plumbing Inspectors take that call at (631) 595-3756. Building Administration is (631) 224-5464, Building Inspectors (631) 595-3764 and Plan Examiners (631) 224-5467, Monday to Friday, 8:00 a.m. to 4:00 p.m.

What Does the Town of Islip Charge for a Permit?

Islip publishes a fee schedule, which puts it in a small minority on Long Island. The figures below are its published amounts effective May 1, 2024. A kitchen or bathroom usually pulls more than one line: the building permit, the plumbing permit, gas if you are running it, and the certificate at the end. Confirm current amounts with the Building Division before you budget.

The penalty schedule is where Islip separates itself. Work performed without a permit is charged at three times the current permit fee where the work is less than four years old, and at one and a half times the current fee where it is four years old or older, subject to a $100 minimum. Islip triples. Babylon's published rule doubles residential permit fees where the application is filed after the work has commenced. That penalty is paid most often by homeowners who find unpermitted work during a sale or a refinance.

Who Is Allowed to Do the Work in Islip?

This requirement is not negotiable. The Town of Islip states that “All work must be performed by a master plumber licensed in the Town of Islip,” and, in capitals on its own paperwork, that “ALL INSPECTIONS MUST BE SCHEDULED BY A MASTER PLUMBER LICENSED IN THE TOWN OF ISLIP.” A Suffolk County home improvement licence does not substitute, and neither does a plumbing licence from another town. The application carries the owner's and the plumber's notarized signatures, plus the plumber's licence, workers' compensation, disability and $1,000,000 liability coverage. Line the plumber up before you file, because the inspection calendar belongs to him.

Electrical runs on a different track. Islip Town Code § 68-25D(2) requires a certificate from “the New York Board of Fire Underwriters, or other approved third party inspector.” The Town publishes no roster of those third parties, so ask the Building Division which agencies it accepts.

Our own carpenters and project managers run your job start to finish. Electrical and plumbing are performed by licensed Nassau and Suffolk trade contractors we've worked with for years — we schedule them, we coordinate the inspections, and we're accountable for the result. Greene Group Construction holds Suffolk County HIC #HI-72958 and Nassau County HIC #EF-65498. We do not hold a Town of Islip trade licence; under Islip's rule the Town-licensed master plumber files the plumbing permit and books its inspections.

What Does Islip Want in the Application Package?

Islip's residential plan intake checklist, dated October 26, 2023, is specific. It asks for the checklist completed by the design professional, a survey less than one year old signed and sealed by a New York State licensed surveyor, construction documents by a New York State licensed architect or engineer, sheets at 24″ × 36″, an electronic copy on acceptance and three sets at approval, a current deed or contract of sale, and a flood zone determination where applicable.

Then comes the concession that matters most here. Islip allows hand-drawn plans for interior non-load-bearing alterations, no smaller than 8½″ × 11″. A bathroom gut inside existing walls, or a kitchen refit that keeps the layout and takes down nothing structural, is exactly that work. Confirm with the Plan Examiners that your scope qualifies before you rely on it.

Insurance paperwork is where complete-looking packages get returned. Islip requires workers' compensation form C-105.2, GSI-105.2 or U-26.3 with the Town of Islip as Certificate Holder, and disability form DB-120.1 or DB-155, or CE-200 where the applicant is exempt. ACORD forms are not accepted, and an ACORD certificate is what most carriers issue by default. The Town also runs a Planning & Development Application Portal at planning.islipny.gov, labelled Beta; it accepts applications and shows status in real time. Whether fees and inspection scheduling are handled inside it is not stated.

How Long Does an Islip Permit Last, and How Long Does It Take?

Islip Town Code § 68-24D provides that “A permit shall expire one year after the date issued,” renewable on payment, with the limit that “not more than three renewals may be granted, except in cases of financial hardship, illness, or death.” One year is tight for a project stalled waiting on custom cabinetry or shower glass, so file when the scope is settled. At the end, § 68-25B(1) requires a certificate where the building “conforms substantially to all the provisions of this ordinance,” and a certified certificate of occupancy is $100 for the first page.

What If Your Address Is Inside an Incorporated Village?

Then the Town is not your building department. Suffolk County is made up of ten towns and 32 incorporated villages, and a village permits separately, with its own application, fee schedule and sometimes its own trade licences. This page describes the Town of Islip's rules for the parts of the Town it permits. The practical test is your property tax bill: village residents are billed a village tax as a separate line, and residents of unincorporated areas are not.

Can a Kitchen or Bathroom Remodel Raise Your Islip Property Taxes?

An improvement can raise an assessment, and New York's Home Improvement Exemption under RPTL § 421-f softens it: 100% of the increase in year one, declining 12.5 percentage points a year across years two through eight. The improvement must exceed $3,000, the greater portion of the building must be at least five years old, ordinary maintenance does not qualify, and the exemption is opt-in by locality. The statutory cap is $80,000; the $750,000 special-assessing-unit provision was repealed effective January 1, 2026.

Here Islip presents a discrepancy, and we are going to state it rather than resolve it. The Town of Islip's own code adopts § 421-f at Chapter 48F, Local Law No. 1 of 1994, at the $80,000 cap. Islip is also absent from the New York State Department of Taxation and Finance's table of localities that have adopted the local option. Both statements are accurate as of July 2026, and we have no basis to say which record is stale. Confirm eligibility and the current filing window with the Islip Town Assessor. This is general information, not tax, legal or code advice.

What Does the Work Itself Cost, and Who Handles It?

Permit fees are a small line inside a larger number. Our published planning ranges run from about $12,000 for a surface bathroom refresh to $250,000 and above for high-end custom kitchen work; the detail sits in our Long Island kitchen remodel cost guide and our bathroom remodel cost guide. For the full service picture, start at kitchen remodeling or bathroom remodeling, and for how Islip's rules sit alongside the other nine Suffolk town departments see kitchen remodeling in Suffolk County.

Permit questions get urgent in one scenario. When a bathroom or kitchen is rebuilt after a failed supply line or a leaking shower pan, the damage rarely stops at the finishes, and the subfloor, joists and ceiling below need assessing before anyone talks about tile. Greene Group Construction runs water damage restoration and insurance claims support as real service lines, so documentation, mitigation and the rebuild sit under one contract. Structural work runs through our general contracting division, and debris leaves with our own junk removal and cleanout crews.

Town of Islip Remodeling Permit FAQ

Do I need a permit to remodel a kitchen in Islip?
It depends on the scope, and the Town of Islip answers it in writing. Islip's permit guidance dated June 16, 2025 states that no permit is required for finish work such as paint, wallpaper, tile, carpet and cabinets. A permit is required for gas piping and new fixtures, and direct replacement of fixtures requires a permit if roughing or new piping is involved. Taking out a load bearing wall to open the kitchen also requires a permit. Confirm your own scope with the Islip Building Division at (631) 224-5464.

Do I need a permit to remodel a bathroom in Islip?
The same published rule decides it. Retiling, repainting and replacing a vanity are finish work under the Town of Islip's June 16, 2025 guidance and are not listed as permit triggers. Adding a fixture, running gas piping, or replacing a fixture where roughing or new piping is involved does require a permit. Converting a tub to a curbless shower normally means new drain and vent piping, which puts it on the permit side of the line.

Does replacing a toilet, sink or vanity require a Town of Islip plumbing permit?
Islip's published wording is that direct replacement of fixtures requires a permit if roughing or new piping is involved. A vanity set back in the same place on the same supply and waste lines is a different job from a toilet moved across the room, which needs new soil, waste or vent piping. Because the phrase turns on what happens behind the wall rather than on the fixture itself, call the Plumbing Inspectors at (631) 595-3756 with your actual scope before you assume either answer.

Who is allowed to do plumbing work and schedule inspections in the Town of Islip?
The Town of Islip requires that all work be performed by a master plumber licensed in the Town of Islip, and it requires that all inspections be scheduled by a master plumber licensed in the Town of Islip. The plumbing and HVAC application carries both the owner's and the plumber's signatures, each notarized, plus the plumber's licence, workers' compensation, disability and $1,000,000 liability coverage. Greene Group Construction holds Suffolk County HIC #HI-72958 and Nassau County HIC #EF-65498 and does not hold a Town trade licence.

What does a Town of Islip building permit cost for a kitchen or bathroom?
Islip publishes a fee schedule effective May 1, 2024. A residential addition or alteration permit is $220 plus $0.37 per square foot. A plumbing fixture permit covering a toilet, tub, shower or sink is $160 plus $25 for each fixture. Gas piping, a gas test only, or a gas line modification is $160. HVAC is $300 for the first system. A certified certificate of occupancy is $100 for the first page. Confirm the current schedule with the Building Division before you budget.

What is the penalty for remodeling without a permit in Islip?
Islip charges three times the current permit fee where the work is less than four years old, and one and a half times the current fee where the work is four years or older, with a $100 minimum. Islip triples. For comparison, the Town of Babylon's published rule doubles residential permit fees where the application is filed after the work has commenced. Legalizing old work in Islip is therefore the most expensive way to buy a permit you could have bought at the start.

Do I need architect-sealed plans, or are hand-drawn plans accepted in Islip?
Islip's residential application checklist calls for construction documents prepared by a New York State licensed architect or engineer on 24 by 36 inch sheets, with a survey less than one year old signed and sealed by a New York State licensed surveyor. The checklist also allows hand-drawn plans for interior non-load-bearing alterations, no smaller than 8.5 by 11 inches. That concession covers a large share of ordinary bathroom work and like-for-like kitchen work. Confirm how it applies to your scope before you draw anything.

How long does a Town of Islip permit take to get, and how long is it good for?
The Town of Islip does not publish a permit turnaround time, and no Long Island jurisdiction does. A contractor quoting you a guaranteed number of days is inventing it. Once issued, Town Code section 68-24D provides that a permit expires one year after the date issued, and it is renewable on payment, with not more than three renewals granted except in cases of financial hardship, illness or death.