Before the shingles, most roof jobs raise three questions: who is allowed to do the work, whether the town needs to know, and what is going on in the attic. Each guide here sticks to one of those questions and links to the county code, town code or manufacturer page behind every answer.
How the guides are organized
- Licenses. Nassau and Suffolk each license home improvement contractors, and the rules, fees and lookups differ.
- Permits. Each town runs its own building department and permit rules under the state building code, so we cover them one town at a time.
- Your roof. How long roofs last here, ice dams, metal versus shingles, and insurance claims after a storm.
If your town does not have a permit guide yet, call its building department before work starts, and check our roof replacement page for the questions to ask your roofer.
Every guide on the site
- 5 Inch vs 6 Inch Gutters
How to size gutters and downspouts for a Long Island roof, using NOAA rainfall data, the New York State plumbing code flow tables, roof pitch and what local installers recommend.
- Amityville Roofing Permit
The Village of Amityville runs its own Building Department, separate from the Town of Babylon. What its code says about permits for roof work, the six and 12 month clocks, the $200 a day penalty, flood rules south of Merrick Road and landmark review.
- Asbestos Roof and Siding Shingles
How to find out whether old roof or siding shingles contain asbestos, what New York's Industrial Code Rule 56 requires before removal, the asbestos certificate on Babylon's permit form, covering it over, and what one Long Island siding company charges for abatement.
- Attic Condensation and Mold
Why roofing nails frost over in a Long Island attic each winter, how to tell condensation drips from a roof leak, the air leaks and fans behind it, the order to fix it in, and what the EPA says about cleaning attic mold.
- Babylon Roofing Permit
The Town of Babylon lists roof replacement with plywood removal as work that needs a building permit. How to file through the online permit center, the fees the town publishes, historic districts and the three villages that run their own.
- Best Roof Shingles for Long Island Homes
The shingle lines Long Island roofers say they install most, judged on impact class, algae coverage, salt air, cold-weather sealing and the designer upgrade, from manufacturer specs and warranties.
- Best Time of Year to Replace a Roof on Long Island
When to schedule a reroof on Long Island, from shingle makers' 40°F cold-weather rules and how the sealant strip works, National Weather Service temperature normals for Islip, and the busy seasons Long Island roofers describe.
- Brookhaven Roofing Permit
What the Town of Brookhaven code says about permits for a new roof, how to apply online, the paperwork, historic district review, and the penalties for skipping it.
- Does a New Roof Raise Property Taxes on Long Island
How Nassau County's Department of Assessment and the Suffolk town assessors treat a reroof versus an improvement, what the state Section 421-f home improvement exemption covers, filing dates, and the Babylon assessor statement fee.
- Double-Hung vs Casement Windows
Double-hung and casement windows compared for a Long Island house. How each one seals, what the NFRC air leakage line means, cleaning from inside, the New York bedroom escape rules for replacement windows, and the price gap local installers publish.
- Downspouts and Dry Wells
Where roof water is allowed to go under Long Island town codes, when a town asks for a dry well, how the storm sizes in those codes translate to gallons, setbacks from the house and lot line, and splash blocks.
- Drip Edge
What drip edge does, what the 2025 Residential Code of New York State requires at eaves and rakes, how it laps with underlayment, and what to ask when a roofing quote leaves it out.
- Dumpster Permits for Roof Jobs
What Long Island town codes say about a roll-off container for a tear-off. Street placement rules in the Towns of Hempstead, North Hempstead, Brookhaven, Babylon and Islip, time limits, who gets blamed for a dumpster in the road, and the state rule for haulers.
- East Hampton Roofing Permit
What the Town of East Hampton code says about building permits and roof work, what the Building Department asks for, how the Architectural Review Board treats roofs in the four town historic districts, and when East Hampton Village or Sag Harbor issues the permit instead.
- Fiber Cement vs Vinyl Siding
Fiber cement and vinyl siding compared for a Long Island house. Installed prices from local companies, fire tests, wind ratings, salt spray, hail and cold, upkeep and the warranty fine print from James Hardie and CertainTeed.
- Floral Park Roofing Permit
The Village of Floral Park lists a house reroof with sheathing replacement as permit work and keeps its own residential roof permit form. The $150 fee, the three inspections, the village contractor license, the fines and the town line that runs through the village.
- FORTIFIED Roofs
The IBHS FORTIFIED Roof standard explained for a Long Island reroof. Ring-shank deck nailing, a sealed roof deck, drip edge and shingle wind ratings, how an evaluator and IBHS certify the roof, and where New York insurance rules stand.
- Freeport Roofing Permit
The Village of Freeport says a shingle-only reroof needs no permit, but replacing any plywood does. The fee schedule, OpenGov filing, permit deadlines, fines and the flood rules that reach a roof in a waterfront village.
- GAF Master Elite and Other Roofer Credentials
What GAF Master Elite, Owens Corning Platinum Preferred and CertainTeed ShingleMaster mean, what each manufacturer asks of a roofer, which warranties they allow, and why none of them is a Nassau or Suffolk license.
- GAF vs Owens Corning vs CertainTeed
Timberline HDZ, Duration and Landmark compared on impact class, wind and algae terms, plus how each company's certified contractor program, workmanship coverage and warranty transfer rules work, from the manufacturers' own documents.
- Garden City Roofing Permit
The Village of Garden City sits in the Town of Hempstead but runs its own Department of Buildings. What the village code says about permits, the August 2025 fee schedule, permit deadlines, design board review and the triple fee for work done without a permit.
- Getting a Roof Ready for Hurricane Season
What Suffolk and Nassau emergency management, the National Hurricane Center, Ready.gov and FEMA tell Long Island homeowners to do with a roof, gutters and trees before a hurricane, plus the photos and papers to have ready.
- Getting Your House Ready for a Tear-Off
What Long Island roofers and shingle makers tell homeowners to do before a tear-off, from moving cars and clearing the attic to taking pictures off the walls, planning for pets, and checking the yard for nails afterward.
- Hempstead Roofing Permit
What the Town of Hempstead code says about a permit for a new roof, the fee formula with worked examples, the paperwork the portal asks for, and the 22 villages that handle their own.
- House Wrap
What the 2025 Residential Code of New York State requires behind siding, felt paper versus synthetic wrap, the Tyvek and Typar installation rules, how wrap is lapped and taped at windows, and what to check before the siding covers it.
- How Long a Roof Replacement Takes
How many days a reroof takes on Long Island, from the ranges Nassau and Suffolk roofers publish, and the things that add days to the job, from rotted decking and rain to second layers and permit waits.
- How Long Does a Roof Last on Long Island?
Real lifespans for asphalt, metal, slate, cedar and flat roofs on Long Island, what shortens them here, and the signs a roof is near the end.
- How Roofers Measure a Roof
What a roofing square is, how a pitch multiplier turns a house footprint into roof area, why roofers order extra for waste, and how satellite and photo measurement reports work, so you can check the square count on a Long Island roof quote.
- How to Read a Roofing Estimate
The lines a Long Island roofing estimate should carry, from tear-off and the decking clause to underlayment, ice barrier, drip edge, flashing, ventilation, dumpster, permit and warranty, plus what New York's home improvement law requires in the signed contract.
- Huntington Roofing Permit
The Town of Huntington says no building permit is needed to replace a roof in kind. When structural work changes that, the fees, triple fees for skipping it, Saturday work and historic district review.
- Ice and Water Shield
Where ice and water shield goes on a Long Island roof, what the 2025 state code's ice barrier rule says, which towns mark it required, valleys and low slopes, and what CertainTeed and Owens Corning say about it.
- Ice Dams on Long Island Roofs
Why ice dams form on Long Island roofs, how to remove them without wrecking the shingles, what steam removal costs, and how to stop them coming back.
- Impact-Resistant Shingles
What a Class 4 shingle rating means under UL 2218 and FM 4473, which shingle lines carry it, what Long Island roofers charge for the upgrade, and why New York does not require an insurance discount for it.
- Islip Roofing Permit
The Town of Islip says no permit is needed to replace roof covering on a house unless structure changes. When a permit does apply, the fees, the portal, the paperwork and the fines.
- Lead Paint Rules for Siding and Window Jobs
The EPA lead renovation rule (40 CFR 745) for siding and window work on Long Island houses built before 1978. Which homes it covers, the Renovate Right pamphlet, the 20 square foot exterior limit, containment and banned tools, cleanup records, and how to look up a certified firm.
- Long Beach Roofing Permit
The City of Long Beach code says roofing never counts as an ordinary repair, so a reroof needs a permit. The fee formula, the city contractor license, the doubled fee, and how the flood article treats a roof on a barrier island.
- Long Island Roofing Permits
A side by side look at what 14 Long Island towns and cities put in writing about a permit for a new roof on a house, the state rules that apply in every one of them, why villages run their own desks, and the questions to ask before work starts.
- Lynbrook Roofing Permit
Lynbrook is an incorporated village with its own Building Department, and its written permit list never mentions roofing. The application fee, the Nassau license and insurance papers the village asks for, design review, solar, dumpsters and the number to call.
- Massapequa Park Roofing Permit
Massapequa Park is an incorporated village with its own Building Department, so the Town of Oyster Bay does not issue its permits. The village fee schedule, work hours, flood rules, penalties and the number to call about a reroof.
- Metal Roof vs Shingles
Metal and asphalt shingle roofs compared for a Long Island house. Installed prices, years of service, what the wind tests mean, salt air, noise, snow, insurance discounts, resale and historic district limits.
- Mineola Roofing Permit
The Village of Mineola runs its own Building Department, so village homes file there, not with a town. What its written material says about roofs, the August 2026 fee schedule, the permit package, insurance rules and the triple fee for legalizing work.
- Nassau County Home Improvement License
Who needs a Nassau County home improvement license, the $650 fee, insurance and experience requirements, and how to look up a contractor's license.
- North Hempstead Roofing Permit
North Hempstead's permit rules exempt ordinary repairs that are not structural, but the permit sections and filing papers never mention roofing. The $250 filing fee, the double fee, the fines, the license check and the 30 villages that run their own.
- Northport Roofing Permit
Northport Village runs its own Building Department, separate from the Town of Huntington. What the village code says about permit fees, triple fees for unpermitted work, and the review board for houses 100 years old or more.
- Oyster Bay Roofing Permit
A 2016 version of the Town of Oyster Bay code let nonstructural repairs skip a permit, and the town never names roofing. How the permit works, the six-month and one-year deadlines, and the 15 villages with their own rules.
- Port Jefferson Roofing Permit
The Village of Port Jefferson runs its own Building and Planning Department. What it says about permits, the half percent fee, the $1,000 bond, the $500 late charges, architectural review downtown and who files with Brookhaven instead.
- Questions to Ask a Roofer
The questions to put to a Nassau or Suffolk roofer before anyone climbs a ladder. County license, the state workers' comp form, liability coverage, manufacturer programs, recent jobs and the permit.
- Riverhead Roofing Permit
Riverhead's building law lists reroofing, a roof recover and replacement siding as exempt from a permit, but not new roof decking. The 2012 wording, the fee rule, sealed plans and where to file.
- Rockville Centre Roofing Permit
The Village of Rockville Centre, not the Town of Hempstead, issues building permits for homes inside its limits. What the village says about roof work, the filing fee, the in-person filing windows, permit time limits, fines and the Nassau license the application asks for.
- Roof and Gutter Heat Cables
How roof and gutter heat cables work, constant wattage versus self-regulating cable, ground-fault protection and UL listing, layout in gutters and downspouts, power draw from manufacturer spec sheets, and what the cable will not do.
- Roof Certification for a Home Sale
The roof letter a buyer, lender or insurer asks for when a Long Island house sells. What it states, the FHA and VA appraisal rules on roofs, what it costs, how long it stays valid and who should write it.
- Roof Decking Replacement
Replacing rotted roof decking on a Long Island reroof. Plywood versus OSB, the thickness shingle makers and the NRCA call for, how crews find soft sheets at tear-off, per-sheet prices local roofers publish, and the towns that want a permit once plywood comes off.
- Roof Flashing
Step, counter, valley, kickout and pipe flashing explained for Long Island homes, what the 2025 New York residential code requires, salt air and metal choices, and when a patch is not enough.
- Roof Insurance Claims on Long Island
How a roof insurance claim works in New York. The deadlines insurers must meet, wear and tear, roof age and depreciation, hurricane deductibles on Long Island, roofers and deductibles, public adjuster fees and appraisal.
- Roof Underlayment
Felt and synthetic roof underlayment compared, what the 2025 Residential Code of New York State requires under shingles, the coastal wind column, and what GAF, Owens Corning and CertainTeed warranties ask for.
- Roof Warranties on Long Island
Manufacturer material warranties, system warranties and a roofer's own workmanship warranty compared. Registration deadlines, transfers when the house sells, what voids coverage, and what Long Island roofers put in writing.
- Roofing Contract Checklist
What New York General Business Law 771 and 771-b require in a Long Island roofing contract. Contractor name and county license number, start and completion dates, make and model of materials, the no-deposit rule, the three-day cancellation notice and the lien notice.
- Roofing Scams on Long Island
The roofing scams Nassau and Suffolk Consumer Affairs, the New York Attorney General and the FTC warn about, from door knockers after storms and cash up front to unlicensed crews and fake town permit invoices, plus where to report one.
- Sag Harbor Roofing Permit
What the Village of Sag Harbor code says about building permits and roof work, how the historic board treats roofs, the consent agenda for roofing, the 1.25 percent permit fee, the 12-month permit term and the town contractor licenses the village code names.
- Sagging Roofline
Why a Long Island roof sags, from rotted plywood to spreading rafters, extra shingle layers and snow, what local roofers and inspectors treat as structural, the state code lines, and why framing work needs a permit.
- Shelter Island Roofing Permit
Shelter Island's town code skips the building permit only for nonstructural work costing $10,000 or less, and the Building Department charges a flat $200 for roofing and siding permits. The town license your roofer needs, how to apply online, ferry truck fares, and Dering Harbor's separate rules.
- Smithtown Roofing Permit
The Town of Smithtown code exempts ordinary repairs that are not structural, and roofing appears nowhere on the town's permit lists. When a roof job needs a permit anyway, plus the 2026 fees, the permit term, fines and the three villages that run their own desks.
- Southampton Roofing Permit
The Town of Southampton says replacing roofing material generally needs no building permit. When it does, the Landmarks Board's pre-1941 rule, the 2026 fee schedule, and the six villages plus part of Sag Harbor that run their own building departments.
- Southold Roofing Permit
Southold's Building Department does not say in writing whether a reroof needs a permit. What the town fee schedule charges, the forms it posts, landmark and flood rules, and why Greenport village homes file at 236 Third Street instead.
- Suffolk County Home Improvement License
Who needs a Suffolk County home improvement license, the written test, insurance and fees, and how to look up a contractor's license and complaints.
- Vinyl vs Fiberglass vs Wood Windows
Vinyl, fiberglass and wood window frames compared for Long Island. How each moves with heat and cold, upkeep, salt air and warranty exclusions, installed prices from local companies, and the ENERGY STAR numbers that apply in Nassau and Suffolk.
- Westhampton Beach Roofing Permit
Westhampton Beach is an incorporated village with its own Building and Zoning Department on Mill Road. What the village has published on permits, the fees we could confirm, Architectural Review Board thresholds, coastal erosion rules and the Southampton Town license its code relies on.
