License check
How to check a fence or deck builder's license in Suffolk or Nassau
A license number takes a minute to check and tells you the company can legally do the work. Here is who issues it in each county, where to look it up, and what else to ask, from the official pages we read on 2026-11-03.
In Suffolk County
- Suffolk's home improvement law names fencing and also reaches other improvements to structures or land that are part of residential property. A business doing that work needs a county license unless an exemption applies.
- Fence and deck contractors who work in Suffolk without a license can face arrest and prosecution, according to Consumer Affairs.
- 1Step 1For a fence or deck builder, select Home Improvement License in Suffolk's License and Complaint Violation Look Up and search the business name or license number.
- 2Step 2Suffolk Consumer Affairs at (631) 853-4600 handles phone verification of a fence or deck builder's license.
In Nassau County
- Fences and railings are on Nassau County Consumer Affairs' list of who must be licensed.
- Decks are one of the work categories on Nassau's home improvement business license application.
- Nassau's code also counts other improvements to structures or land next to a dwelling as home improvement work.
- 1Step 1Enter the fence or deck company's license number or name in Nassau's Valid Business License Search and click Search. The county updates that database daily.
Towns with a license of their own
- City of Long Beach: The City issues building permits only to a City of Long Beach licensed contractor or the homeowner, and a licensed contractor must complete an affidavit that they alone are doing the work.
- Town of Southampton: Southampton requires its own Home Improvement Contractor's License for home improvement work, and its licensing covers every village except the Village of Westhampton Dunes. A builder of a new home needs no town license for now, but the builder's subcontractors must be licensed.
- Town of Southampton: A Southampton home improvement license is valid for one year. A new application costs $250.00 by cash or check or $257.50 by credit, and an on-time renewal costs $175.00, or $180.25 by credit.
- Town of Shelter Island: Shelter Island requires home improvements to be performed by a licensed contractor holding a Shelter Island license.
- Town of Shelter Island: Shelter Island's notice to contractors says every contractor or subcontractor working on the island, landscapers included, needs a town license.
- Town of Shelter Island: Shelter Island takes home improvement license applications online, and a new license needs a $250 check to the town, a liability certificate naming the town as certificate holder and, if applicable, a workers' compensation certificate.
Beyond the license
- Ask for a certificate of insurance sent to you by the insurer, naming you as the certificate holder.
- Ask who files the permit and books the inspections, and get it in the contract.
- Get the price, the scope, the start and finish dates and the payment schedule in a written contract.
Related
Questions homeowners ask
Do I need a permit for a fence on Long Island?
It depends on the town or village and on the height. Each town page below quotes what the town's own pages say about fences.
Does a deck need a permit on Long Island?
Many towns require one, often once the deck is a set height off the ground. The town pages below list each town's rule as printed.
Sources
Every fact on this page comes from these official pages. Rules and fees change, so confirm with the office before you file anything.
- Suffolk County Consumer Affairs, Home Improvement License Law (PDF) (read 2026-11-03; page dated 5/25)
- Suffolk County Consumer Affairs, Licensing and Enforcement (read 2026-11-03)
- Suffolk County, License and Complaint Violation Look Up (read 2026-11-03)
- Nassau County Consumer Affairs, Who Must Be Licensed? (read 2026-11-03)
- Nassau County Consumer Affairs, Home Improvement Business License Application (PDF) (read 2026-11-03)
- Nassau County, Administrative Code (PDF) (read 2026-11-03; page dated January 1, 2026)
- Nassau County Consumer Affairs, Valid Business License Search (read 2026-11-03)
- City of Long Beach, Building Department (read 2026-11-03)
- Town of Southampton, contractor licensing questions (read 2026-11-03)
- Town of Southampton, Licensing Applications and Forms (read 2026-11-03)
- Town of Shelter Island, FAQs (read 2026-11-03)
- Town of Shelter Island, Notice to All Contractors (read 2026-11-03)
- Town of Shelter Island, Building Department (read 2026-11-03)
Checked 2026-11-03. Facts come only from the official pages listed, read on that date.
Talk the job through before you call anyone
Tell us about the house and the job in about four minutes. Revival calls you, free, to go over the scope, the budget, the timing and your town's permit office. Contractor matches open as our first licensed partners sign.