Seaford, Delaware Building Permit Guide

Seaford is in Sussex County, and the City of Seaford Code Department reviews and issues permits for commercial and residential construction, plumbing, signs and demolition. It enforces the 2021 International Building, Residential and Plumbing Codes. A Sussex County building permit is also needed: Seaford’s application requires applicants to obtain one before construction starts.

This guide covers the City of Seaford Code Department and the Sussex County permit that goes with a Seaford permit.

What requires a building permit in Seaford?

Beyond new construction, Seaford requires permits for decks, garden sheds, swimming pools, siding, fences, sidewalks and paving. Plumbing, sign and demolition work also take a City permit. Demolition needs notice to DNREC 7 to 10 days before the work.

Seaford sits 8 to 30 feet above sea level along the Nanticoke River, so few properties are in the flood zone.

Delaware has no statewide building code — each county and town that runs a building department adopts its own — but plumbing, mechanical, fuel gas, energy and fire codes are set at state level, electrical work is inspected by state-licensed agencies, and the State Fire Marshal reviews plans for most non-residential work. Delaware rules

Who handles permitting in Seaford?

Seaford’s permit review worksheet lists other approvals that may apply, including Sussex Conservation District stormwater and erosion-and-sediment review and State Fire Marshal building plan review.

Seaford permit costs and fees

From July 1, 2026, Seaford building permits, residential and commercial, cost $50 for the first $1,000 of project valuation plus $10 for each additional $1,000. Plumbing permits are a $30 base fee plus $5 per fixture. The Sussex County permit is separate.

How to get a building permit in Seaford

Inspections in Seaford

Required inspections are listed on the permit. The contractor must schedule each one at least 24 hours in advance at 302-629-9173.

Official Seaford permitting resources

These are the primary sources behind this guide. Codes, fee schedules and procedures change — confirm the position for your filing date.

• Seaford Code Department
• Seaford building permit application
• Seaford code FAQs
• Seaford permit fee adjustment notice

Frequently asked questions

Do I need a Sussex County permit for work in Seaford?

Yes. Seaford’s application requires a Sussex County building permit before construction starts; call Sussex County Permits at 302-855-7720.

Does a garden shed need a permit in Seaford?

Yes. Seaford requires permits for decks, garden sheds, swimming pools, siding, fences, sidewalks and paving.

Who books inspections in Seaford?

The contractor, at least 24 hours in advance, at 302-629-9173.

Simplify Seaford permitting with Alliance Permitting

• Confirm which town and county offices cover the parcel and the project
• Prepare the town application, cost documents and any county or state filings that go with it
• Schedule the town’s inspections and close out the permit

Alliance Permitting is a permit documentation and submission company in Delaware. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Seaford permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.