Short answer: yes, you almost certainly need one
Any fence 4 feet or taller in most Nassau and Suffolk County towns requires a building permit. Some villages require permits for all fences, regardless of height. We research your specific address — permit rules vary by town and incorporated village, sometimes dramatically within the same zip code.
Nassau County Permit Overview
Nassau County is made up of three towns (Hempstead, North Hempstead, and Oyster Bay) plus two cities (Long Beach and Glen Cove), each with their own building departments. On top of that, Nassau has dozens of incorporated villages with their own separate permit authority.
Town of Hempstead
Permit required for fences 4 feet+. Application to Town of Hempstead Building Department. Includes all unincorporated Hempstead areas.
3–7 business days typical
Town of North Hempstead
Permit required for fences 6 feet+ in most residential zones. Some districts require permit for 4 feet+. Check your zone.
5–10 business days typical
Town of Oyster Bay
Permit required for all fences in most residential zones, regardless of height.
5–10 business days typical
Incorporated Villages (Nassau)
Each village has its own rules. Great Neck, Garden City, Lynbrook, Rockville Centre, etc. all have separate building departments. Can be stricter than town rules.
7–21 business days depending on village
Suffolk County Permit Overview
Suffolk County has 10 towns, each with its own building department, plus numerous incorporated villages. Suffolk permit timelines tend to be slightly longer than Nassau.
Town of Huntington
Permit required for fences over 4 feet. Separate pool barrier permit required if fence is also a pool barrier.
5–12 business days
Town of Babylon
Permit required for fences 4 feet+. Height limits vary by zone (front vs. rear yard).
5–10 business days
Town of Brookhaven
Permit required for fences 6 feet+ in most residential zones. 4+ feet in some zones — check zoning.
5–14 business days
Town of Smithtown
Permit required for all fences in residential areas. Height maximums: 4 feet front yard, 6 feet side/rear.
5–10 business days
Eastern Suffolk (Riverhead, Southampton, East Hampton)
Stricter rules in some areas. Historic districts may have style restrictions. Deer exclusion fences may require separate permits.
7–21 business days
What Happens If You Skip the Permit
Stop-work order
If a neighbor complains or an inspector notices, you can get a stop-work order mid-installation, leaving you with a half-finished fence and a mess.
Removal order
The town can order you to remove the un-permitted fence entirely — at your expense. We've seen this happen.
Fines
Fines vary by town, but $500–$1,500 is common for un-permitted work discovered during a complaint inspection.
Title issues when selling
Un-permitted structures flag in a title search. Buyers may require you to remove the fence or retroactively permit it before closing.
Insurance complications
If someone is injured near your fence and it wasn't permitted, your homeowner's insurance claim can be complicated by the non-compliance.
How We Handle Permits
We research your address
Before the estimate, we look up your specific town, village, and zone to understand the permit requirements that apply to you specifically.
Permit fee is included in the estimate
We tell you the permit fee upfront. It's included in your written estimate — not a line-item surprise at the end.
We file the application
We fill out and submit all permit paperwork to the correct authority. For pool barrier permits, this includes drawings.
We schedule around approval
We do not start work until the permit is approved. If you need work done urgently, we'll tell you the realistic timeline.
FAQ
Do I need a permit to install a fence on Long Island?
Almost always yes, for fences 4 feet or taller. Permit requirements vary by town and incorporated village. Some villages within Nassau or Suffolk towns have stricter rules than the town itself. We research your specific address's permit requirements as part of every estimate.
How long does a fence permit take in Nassau County?
Most Nassau County towns approve fence permits in 3–7 business days. Some incorporated villages take longer — up to 2–3 weeks in a few cases. We build this time into the schedule and tell you upfront what to expect for your specific address.
What happens if I install a fence without a permit?
Potential consequences: the town can order you to remove the fence at your expense, you may face fines, and you can have problems when selling the property — an un-permitted fence shows up in a title search. The cost of a permit ($80–$300 typically) is always worth it.
Do you handle the permit application for us?
Yes. We pull the permit as part of every job. Permit fee is included in our estimate — no surprise line-item. We fill out all paperwork, submit to the correct authority, and track approval. You don't have to do anything.