Table of Contents
- Long Island permits come from your town, village or city building department, so rules, forms and timing differ from block to block.
- Nassau and Suffolk counties require home improvement contractor licensing through county consumer affairs; verify your contractor before signing.
- Typical 2026 planning range is about $250 to $500 or more per square foot, with design and permit costs on top.
- South-shore, canal-front and North Shore waterfront parcels may face FEMA flood-zone elevation and materials rules; verify with your municipality.
- A whole-house gut usually takes 4 to 9 months including permits; larger Suffolk jobs outside our core area are taken by arrangement.
On Long Island the first question is not "which contractor" but "which building department." A cape in Levittown, a colonial in Garden City, a canal-front ranch in Massapequa and a Victorian in Sea Cliff all sit under different permitting authorities with different forms, inspection habits and review times. The structure is more consistent than the paperwork: wood frame, a slab or basement, a boiler or furnace, and a yard. This guide explains how gut renovations work across Nassau and western Suffolk, what to budget in 2026, and how to hire without surprises.
1. Start With Who Issues Your Permit
Building permits on Long Island come from the town, village or city where the house sits. Counties handle contractor licensing, not construction permits. Because Nassau and Suffolk are layered with incorporated villages inside towns, two neighbors on opposite sides of a street can deal with different offices.
| Where you live | Typical permitting authority | Notes |
|---|---|---|
| Garden City, Floral Park, Mineola, Rockville Centre, Lynbrook, Freeport, Valley Stream, Westbury, Farmingdale | Incorporated village building department | Village rules can be stricter on design review and hours |
| Hempstead, East Meadow, Baldwin, Merrick, Bellmore, Wantagh, Oceanside | Town of Hempstead and its subdivisions | Many unincorporated hamlets fall under the town |
| Hicksville, Plainview, Syosset, Jericho, Oyster Bay | Town of Oyster Bay | Large lots, colonials, historic pockets |
| Manhasset, Port Washington, Roslyn | Town of North Hempstead or village offices | Waterfront and historic homes |
| Glen Cove | City of Glen Cove | City building department |
| Huntington, Northport, Islip, Bay Shore, Babylon, Smithtown, Brookhaven, Southampton | Respective Suffolk town or village | Confirm with the specific office |
This table is a general guide. Always verify which office has jurisdiction over your parcel. County websites, such as Nassau County and Suffolk County, point homeowners toward the right local departments and contractor licensing resources.
Contractor licensing is county-level
Nassau and Suffolk counties require home improvement contractor licensing through county consumer affairs offices. Verify that the license is current for the county where your house sits. If you also own property in the five boroughs, remember that New York City has a separate Home Improvement Contractor license through its Department of Consumer and Worker Protection.
2. What Long Island Gut Renovations Look Like
Most Long Island gut jobs fall into recognizable groups.
- Post-war capes and ranches (Levittown, Hicksville, Bellmore, Wantagh, East Meadow). Small footprints, slab or crawl space foundations, and a common desire for more room. A gut often comes with a second-floor addition, dormer, or rear extension.
- Colonials and Tudors (Garden City, Jericho, Syosset, Manhasset, Cedarhurst, Woodmere). Larger floor plates, finished basements, and older kitchens that need new layouts. Systems are bigger, so mechanical budgets are bigger.
- Waterfront and canal-front homes (Massapequa, Freeport, Long Beach, Lindenhurst, Port Washington). Flood-zone rules, wind exposure and moisture shape every material choice.
- Historic and Victorian homes (Sea Cliff, Northport, Roslyn, Oyster Bay, Huntington). Plaster, old framing, tight lots and sometimes local historic review.
- Co-ops and condos (Great Neck, Mineola, Long Beach, Lynbrook). Board approvals, alteration agreements and shared plumbing stacks similar to city buildings.
What a typical gut includes
- Demolition of kitchens, baths and failing finishes, with hazmat testing first.
- New electrical service, panel and wiring, often with provisions for EV charging and modern loads.
- New supply and drain plumbing, replacing galvanized and cast iron.
- Insulation, air sealing and new windows where needed.
- New heating and cooling, a major decision on its own.
- Kitchens and baths with proper waterproofing and tile.
- Flooring, trim, paint and, often, exterior work such as siding or paint.
For a deeper look at how this plays out in a specific house style, read our guide to gut renovating a Long Island colonial or cape.
3. Long Island Gut Renovation Costs in 2026
The ranges below are typical 2026 planning figures for the New York metro, not quotes. Municipality, site access, condition, hazardous materials, finishes and scope all move the final price, and a written itemized proposal governs.
| Item | Typical planning range (October 2026) |
|---|---|
| Cosmetic refresh | $100 to $250 per sq ft |
| Mid renovation with kitchen and bath | $200 to $400 per sq ft |
| Full gut renovation | $250 to $500+ per sq ft |
| High-end or structural | $500 to $1,000 per sq ft |
| Design, engineering and permit fees | Often 15 to 25 percent on top |
| Selective demolition and haul-away | $8 to $30 per sq ft |
| Full bathroom | $30,000 to $60,000+ |
| Full kitchen | $25,000 to $85,000+ |
Where costs move
Additions. Many gut projects expand the house. New square footage adds foundation, framing, roofing, siding and zoning review.
Mechanicals. Heating and cooling replacement can be a five-figure line item by itself. Efficiency choices affect long-term operating costs; the Department of Energy's Energy Saver guidance gives homeowner-level background.
Exterior scope. Roofing, siding and paint often get bundled with the gut. Coastal salt air argues for durable materials.
Site access. Driveways make deliveries easy, but tight village streets, parking limits and hours can slow work.
4. Flood Zones, Canals and the South Shore
Long Beach, Freeport, Merrick, Massapequa, Baldwin, Oceanside, Hewlett, Lawrence, Lindenhurst, Amityville and Babylon have areas close to bays, canals and tidal creeks. North Shore waterfront communities such as Port Washington, Glen Cove, Sea Cliff and Oyster Bay have their own bluff, drainage and shoreline concerns. Many parcels in these areas are in FEMA flood zones, where elevation and flood-resistant materials rules may apply, and substantial renovations can trigger stricter standards than minor repairs.
Before design, ask your building department:
- Is the parcel in a FEMA flood zone, and which one?
- Does the scope of the renovation count as a substantial improvement under local rules?
- Are there requirements for elevating mechanicals, flood vents or specific materials?
- Are there limits on finishing a basement or lower level?
Plan accordingly. Raised electrical panels, flood-tolerant finishes at grade, sump systems and good exterior drainage cost less when planned than when retrofitted.
5. Neighborhoods and ZIP Codes We Serve
N.Y. Renovation Services takes gut renovation projects across Nassau County and western Suffolk. Here are the communities, their ZIP codes and housing notes.
Nassau County
- Long Beach: 11561. Barrier-island homes, flood-zone elevation rules and condos.
- Garden City: 11530. Village of Garden City, large colonials and strict village permits.
- Hempstead: 11550. Town and Village of Hempstead, capes, colonials and multifamily.
- Mineola: 11501. Village of Mineola, capes and co-ops.
- Floral Park: 11001. Village of Floral Park, Tudor and colonial homes.
- Valley Stream: 11580, 11581. Capes and colonials in the Village of Valley Stream.
- Rockville Centre: 11570. Village of Rockville Centre, colonials and co-ops.
- Lynbrook: 11563. Village of Lynbrook, colonials and co-ops.
- Freeport: 11520. Village of Freeport, waterfront homes and flood zone.
- Oceanside: 11572. Capes and colonials with waterfront pockets.
- Baldwin: 11510. Capes, ranches and flood-prone pockets.
- Cedarhurst: 11516. Five Towns, large colonials.
- Hewlett: 11557. Five Towns, colonials and flood-zone pockets.
- Lawrence: 11559. Five Towns, large waterfront homes.
- Woodmere: 11598. Five Towns, large colonials.
- Merrick: 11566. Capes, ranches and south-shore flood pockets.
- Bellmore: 11710. Capes, ranches and colonials.
- Wantagh: 11793. Ranches and capes on the south shore.
- Massapequa: 11758. Ranches, capes, colonials and canal-front homes.
- Levittown: 11756. Post-war Levitt capes and ranches, where additions are common.
- Hicksville: 11801. Capes and ranches in the Town of Oyster Bay.
- Plainview: 11803. Colonials and ranches in the Town of Oyster Bay.
- Syosset: 11791. Colonials on large lots, Town of Oyster Bay.
- Jericho: 11753. Colonials and large homes, Town of Oyster Bay.
- Westbury: 11590. Village of Westbury, capes and colonials.
- New Hyde Park: 11040. Capes, ranches and co-ops.
- East Meadow: 11554. Ranches and capes in the Town of Hempstead.
- Great Neck: 11021, 11023, 11024. Village of Great Neck, co-ops and large homes.
- Manhasset: 11030. Large colonials in the Town of North Hempstead.
- Port Washington: 11050. Waterfront homes and flood-zone pockets, Town of North Hempstead.
- Roslyn: 11576. Village of Roslyn and historic homes.
- Glen Cove: 11542. City of Glen Cove and waterfront homes.
- Sea Cliff: 11579. Village of Sea Cliff, Victorian cottages and steep lots.
- Oyster Bay: 11771. Town of Oyster Bay, historic and waterfront homes.
- Farmingdale: 11735. Village of Farmingdale, capes and colonials.
Suffolk County
- Amityville: 11701. Village of Amityville, south-shore homes and flood pockets.
- Babylon: 11702. Village and Town of Babylon, south-shore homes and flood pockets.
- Lindenhurst: 11757. Canal-front homes and flood-zone pockets.
- Bay Shore: 11706. Town of Islip and waterfront homes.
- Islip: 11751. Town of Islip, waterfront and colonial homes.
- Deer Park: 11729. Town of Babylon, ranches and capes.
- Huntington: 11743. Town of Huntington, historic and waterfront homes.
- Northport: 11768. Village of Northport and waterfront Victorians.
- Commack: 11725. Town of Smithtown and Huntington, colonials and ranches.
- Smithtown: 11787. Town of Smithtown, colonials and large lots.
- Brookhaven: 11719. Town of Brookhaven, ranches, colonials and large lots.
- Southampton: 11968. Village and Town of Southampton, large estates and seasonal homes.
Larger projects in Smithtown, Brookhaven and Southampton are taken by arrangement, so the first step there is a conversation about scope, schedule and logistics. See our full list on the Long Island ZIP codes page.
Local differences to expect
In villages like Garden City, Rockville Centre, Floral Park and Great Neck, design review and work-hour limits may be more likely, and permit offices may be more particular about plans. In Levittown, Hicksville, Bellmore and Wantagh, the main question is how far to push beyond the footprint with a dormer or extension. On the south shore, flood elevation shapes mechanical placement. In the Five Towns, larger colonials and waterfront lots mean bigger systems and tighter coordination with neighbors. North Shore communities like Manhasset, Roslyn and Port Washington combine large homes with slopes, drainage and shoreline concerns. You can see how this plays out in individual markets on our Manhasset, Levittown and Rockville Centre pages.
6. Lead, Asbestos and Silica in Older Long Island Homes
A large share of Long Island housing was built between the 1940s and the 1970s. Testing before demolition is standard.
- Lead. The EPA Renovation, Repair and Painting Rule requires anyone paid to disturb paint in pre-1978 homes to be certified and use lead-safe practices. The EPA RRP program page has the details.
- Asbestos. Vinyl floor tile and mastic, pipe and boiler insulation, roofing, siding and plaster can contain asbestos in older houses. Disturbing suspect materials requires survey or assessment and certified abatement when present. Pre-1987 buildings commonly trigger surveys. We never promise a house is asbestos-free without testing.
- Silica. Cutting or demolishing tile, stone, concrete and masonry creates respirable dust. OSHA's silica standard calls for wet cutting, dust collection and respirators where required.
- Oil tanks. Many older houses have buried or basement oil tanks. Removal or conversion is common during a gut and is regulated, so ask early.
7. A Long Island Gut Timeline
| Phase | Typical duration |
|---|---|
| Design and drawings | 3 to 8 weeks |
| Municipal permit review | Weeks for simple filings, months for complex ones |
| Hazmat testing and abatement | 1 to 4 weeks when needed |
| Demolition | 1 to 3 weeks |
| Rough plumbing, electrical, HVAC, with inspections | 4 to 8 weeks |
| Close-up, tile, flooring, cabinets, paint | 8 to 16 weeks |
| Punch list and certificate of completion | 2 to 4 weeks |
Overall, plan for 4 to 9 months including approvals. Use our renovation timeline planner to map your phases.
8. Why a Licensed Contractor Matters on Long Island
At N.Y. Renovation Services we tell owners plainly: a house gut puts the whole structure, your savings and your family's living arrangements on the line.
- County licensing and insurance. Using an unlicensed contractor leaves you with limited recourse and may complicate insurance claims. Ask for the current license and proof of insurance before signing.
- Permits and inspections. Unpermitted work can derail a sale, an insurance claim or a refinance. A contractor who files properly protects your title.
- Water and structure. Notched joists, wet basements and bad flashing cause damage that shows up months later. Doing it right costs far less than reopening finished walls.
- Hazards. Lead and asbestos rules apply to paid work, and a certified team keeps your family and neighbors safe.
- One team. N.Y. Renovation Services handles design coordination, demolition, tile, flooring, carpentry and painting in-house, so you work with one accountable company rather than a rotating cast of subs.
9. How We Run a Long Island Gut Renovation
Our process is built around the points that cause delay in Nassau and Suffolk.
- Free estimate. We visit, measure, photograph and discuss scope, budget and schedule.
- Itemized proposal. Demolition, hazmat allowances, rough trades, tile, flooring, millwork and paint appear as separate lines in a detailed contract with no hidden fees.
- Permits handled. Ask us to handle permitting for you. We coordinate with your architect or engineer and your town, village or city building department, and with your board for co-ops and condos. See our pages for Long Beach, Garden City and Hempstead.
- Hazmat first. Testing before demolition and certified abatement when required.
- Sequenced build. Demolition, rough-ins, inspections, close-up, waterproofing, tile, floors, cabinets, paint and closeout.
- Pledge. We donate 5 percent of total project cost to a nonprofit of your choice.
Because we are based on Staten Island and serve the region, we can handle Nassau and western Suffolk jobs without treating them as one-off trips. Ask about scheduling when you request your estimate.
Decisions we help you make early
The best Long Island gut renovations settle four questions before demolition. First, how far beyond the existing footprint to go, because a dormer or rear extension changes the permit path and the budget. Second, which heating and cooling system fits the finished house rather than the old one. Third, what to do with the basement, whether it stays storage, becomes finished space or needs waterproofing and egress work. Fourth, whether exterior work such as roofing, siding and paint should be part of the same contract so scaffolding and schedules are shared. We walk through these at the estimate visit and price the options side by side, so you are choosing from a written comparison instead of guessing.
Keeping the neighbors on your side
Suburban gut jobs fail socially long before they fail technically. A dumpster in the wrong place, a crew that starts too early, or dust drifting next door turns a quiet block against you. N.Y. Renovation Services keeps to permitted hours, places containers and deliveries with the street in mind, protects landscaping, and cleans up daily. A renovation that keeps its neighbors comfortable is also one that finishes without complaints to the village.
10. Related Guides
- Long Island Renovation Services lists everything we do in Nassau and Suffolk.
- Gut Renovation in NYC: The Complete 2026 Guide covers the process in detail.
- What Does a Renovation Cost in NYC in 2026? breaks down ranges by room.
- Do I Need a Permit? separates cosmetic work from permitted work in NYC.
- Bathroom remodeling covers tile and waterproofing.
- Crossing the city line? Compare Queens gut renovation contractors.
11. Next Steps: Get Your Free Estimate
You do not need drawings to start. Tell us about the house and what you want to change.
- Open the quote request form, or call (347) 455-1741. Texting works too. We are open Monday to Saturday, 8:00 AM to 5:00 PM.
- We schedule a free estimate and review your municipality's rules and flood status with you.
- You receive a written, itemized proposal with an approval path and timeline.
- After you sign, we coordinate permits, testing and scheduling so the build matches the approved plan.
Figures and rules are current as of October 2026 and may change. Always verify specifics with your town, village or city building department.
Safety Note: All work follows OSHA 30 safety and EPA Lead-Safe practices for pre-1978 homes. Check local permit requirements before starting.
James - Lead Renovation Editor. With over 20 years in renovation and construction, James writes and edits our guides. More about James