New Castle County Delaware Residential Permit Guide

New Castle County homeowners should check eServices, Land Use, and building inspections before starting new construction, alterations, interior or exterior improvements, repairs, demolition, utility work, or site changes.

Permit takeaway

New Castle County says construction activity including new buildings, interior and exterior improvements, alterations, and most repairs requires a permit unless specifically exempted by county code.

Zoning and placement

Before filing, verify land use, parcel, zoning, site, contractor, utility, ADU, and certificate requirements through the county permit and inspection resources.

Building and trade review

Building, demolition, and many utility permits are processed through eServices and ePlans, while electrical inspections are handled through the State of Delaware or a licensed inspection agency.

Call before applying when

Call before applying if the project includes an addition, finished basement, deck, garage, structural repair, utility work, demolition, ADU, or electrical work by an owner-occupant.

Documents to prepare

• eServices account
• Permit application
• Site plan
• Construction drawings
• Contractor or homeowner electrical information

Inspection planning

• Figure out required permits
• Submit through eServices
• Upload required plans to ePlans
• Schedule inspections online
• Save permit and inspection history

Official sources

• New Castle County Permits and Inspections
• New Castle County Figure Out Permits
• New Castle County Get a Permit

This guide is a planning summary. Always verify the current requirements with the local office before starting work.