County Building Permits
Nassau County, NY - Unincorporated Area Building Permit Guide
How to apply for a building permit in unincorporated Nassau County, New York. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
Unincorporated areas of Nassau County are typically served by Town of Hempstead, Town of North Hempstead, or Town of Oyster Bay building departments.
- Department
- Nassau County (Unincorporated Areas)
Application Process
- Determine which town jurisdiction applies to the property location (Hempstead, North Hempstead, or Oyster Bay).
- Contact the applicable town building department for permit requirements and procedures.
- Coordinate with Nassau County DPW if construction involves or is near county roads.
- Submit application materials as directed by the town building department.
Typical processing time: Varies by town.
General Requirements
Building permits required for all regulated construction in unincorporated areas; enforcement handled by applicable town building department.
- Building code
- NYS Uniform Fire Prevention and Building Code; Energy Code
Work That Does NOT Require a Permit
Contact the Nassau County (Unincorporated Areas) to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
Additional Resources
- Building code: NYS Uniform Fire Prevention and Building Code; Energy Code
- Nassau County Towns, Cities and Villages Directory
- Nassau County List of Communities
- License lookup guide: New York Contractor License Requirements
- Contract template: New York Homeowner-Contractor Agreement
- New York hub: New York Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Nassau County (Unincorporated Areas) before applying.
Frequently Asked Questions
Nassau County Building Permit FAQ
- Do I need a building permit in unincorporated Nassau County, NY?
- Building permits required for all regulated construction in unincorporated areas; enforcement handled by applicable town building department.
- How do I apply for a building permit in unincorporated Nassau County, NY?
- 1. Determine which town jurisdiction applies to the property location (Hempstead, North Hempstead, or Oyster Bay). 2. Contact the applicable town building department for permit requirements and procedures. 3. Coordinate with Nassau County DPW if construction involves or is near county roads. 4. Submit application materials as directed by the town building department.
- How long does it take to get a building permit in unincorporated Nassau County, NY?
- Typical processing time is Varies by town..
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