Do I need a permit for accessory dwelling unit (adu) in Town of North Hempstead?
Yes. In New York, accessory dwelling unit (adu) generally requires a permit, and Town of North Hempstead is no exception.
A new dwelling unit, detached or created inside an existing home, needs a building permit, and use of the space is allowed only after a certificate of occupancy or compliance is issued (19 NYCRR 1203.3(a)(1), 1203.3(d)(1)). Whether an accessory unit is allowed on a lot is decided by local zoning; New York City's construction codes include separate ancillary dwelling unit provisions (NYC Building Code Appendix U). The 2025 code provisions that would bar fossil-fuel equipment in new buildings (19 NYCRR 1240.6 and Subpart 1229-2) are suspended by court order; the Department of State's July 2, 2026 update says they are neither effective nor enforceable.
Documents you may need
- Local zoning approval for the accessory dwelling unitLikely required
- Building permit applicationRequired
- Site plan with distances to lot lines, utilities, and accessRequired
- Construction documents with an Energy Code compliance statementRequired
- Certificate of occupancy or compliance before the unit is usedRequired
Possible inspections
- Footing and foundation inspection
- Framing and electrical, plumbing, and mechanical inspections
- Insulation and energy code inspection
- Final inspection
Frequently asked questions
- Do I need a permit for accessory dwelling unit (adu) in Town of North Hempstead?
- Yes. In New York, accessory dwelling unit (adu) generally requires a permit, and Town of North Hempstead is no exception. The documents and inspections sections on this page list what the building department typically asks for.
- Who issues the permit in Town of North Hempstead?
- The local building department for Town of North Hempstead handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.