Shed permit Nassau County NY — 2025 guide
By Kevin Marcello · Updated April 2026 · 6 min read
One of the first questions we hear when a Nassau County homeowner contacts us about a shed is: do I need a permit? The answer depends on where you live, how big the shed is, and what type of foundation you want.
Nassau County permit basics
Nassau County has three towns: Hempstead, North Hempstead, and Oyster Bay. Each has its own building department with slightly different rules. Then there are the cities (Long Beach, Glen Cove) and villages (Garden City, Westbury, etc.) which have their own permit authorities separate from the town. Getting the right permit means knowing which authority covers your address — something we've sorted out for hundreds of projects.
When you need a permit
The general rule across most Nassau municipalities is:
- Permanent foundation (concrete slab, poured piers): permit required, regardless of shed size
- Shed over 100–144 square feet: permit required in most municipalities
- Attached to the house: permit required in all cases
- Any shed with electrical: permit required in all cases
When you typically don't need a permit
A freestanding shed under 100 square feet (10×10 or smaller) on a non-permanent foundation — gravel, skids, or adjustable piers — often doesn't require a permit in Nassau County residential zones. But always verify: a 10×12 shed is 120 square feet, which triggers the permit requirement in Hempstead, Oyster Bay, and most villages.
What we do for you
Frequently asked questions
Most Nassau County municipalities require a permit for sheds on permanent foundations or over 100–144 square feet. Temporary skid-foundation sheds under that threshold often don't require a permit, but rules vary by town. We check your specific municipality before quoting.
Typically 3–6 weeks. Some municipalities like the Town of Oyster Bay process permits faster; others like the City of Long Beach take longer. We file immediately after your deposit and account for the timeline in your build schedule.
Filing fees vary by municipality and project size, typically $100–$400 for a residential shed. Any required architectural drawings add cost. All permit costs are included in your written estimate — we don't charge them as add-ons after the fact.
An unpermitted shed can become a problem when you sell your home — title companies and buyers flag unpermitted structures. Some municipalities issue fines for unpermitted builds. Getting a permit protects your investment and keeps your sale process clean.
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We handle the permit research and filing. You just pick the shed you want.
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