Delaware county guide · geographic index
New Castle County building permits, inspections & zoning
Use this page to orient your search for the authority that handles building permits, plan review, inspections, zoning, and certificates of occupancy in New Castle County, Delaware.
State-specific context
What to verify in Delaware
Delaware has a relatively centralized code framework, but permits, inspections, zoning, and certificates of occupancy still route through the responsible local jurisdiction.
Statewide framework with local administration. The county may provide some services, but an address inside an incorporated city or another local jurisdiction may be served by a separate building department.
Your next steps
How to find the right permit office
- 01Identify the exact property address and municipality.
- 02Check whether the city, town, township, borough, parish, county, or regional authority serves that address.
- 03Ask which permits, zoning approvals, plan reviews, and inspections apply to the project.
- 04Save the official portal, permit number, approved plans, and inspection instructions together.
Verified local coverage
Research-backed department guides
Middletown
Town of Middletown Permits, Licensing and Inspections →
Official contact, permit, inspection, zoning, and portal details.
New Castle County
New Castle County Department of Land Use →
Official contact, permit, inspection, zoning, and portal details.
Newark
City of Newark Planning and Development Department →
Official contact, permit, inspection, zoning, and portal details.
Wilmington
Wilmington Department of Land Use and Planning →
Official contact, permit, inspection, zoning, and portal details.