License check
How to check a garage door installer'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
- Garages are named in Suffolk's home improvement law, which also covers any repair or improvement to a home. A garage door business therefore needs a license from Consumer Affairs, barring an exemption.
- Garages are among the home improvement areas Suffolk Consumer Affairs lists on its licensing page.
- 1Step 1Search a garage door installer as a Home Improvement License in Suffolk's License and Complaint Violation Look Up.
- 2Step 2Garage door installers' Suffolk licenses are verified by Consumer Affairs on its main line, (631) 853-4600.
In Nassau County
- Garage Doors is a work category on Nassau's home improvement business license application, listed with awnings, decks and painting.
- Nassau's Administrative Code includes garages in its definition of home improvement work.
- 1Step 1Nassau asks for search criteria in just one field of its Valid Business License Search, so a garage door company can be found by name alone.
Towns with a license of their own
- 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
Does garage door work need a license on Long Island?
Garage door work on a home is home improvement work, so the county home improvement license applies in Nassau and in Suffolk.
Can I replace a garage door spring myself?
Springs carry a lot of tension and can injure people. Leave them to trained technicians.
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, 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)
- 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.