New Castle County, DE Building Safety: Building Inspections (2026)
Key Facts
- Governing chapter
- Chapter 6, Building Code, Article 3
- Inspection stages
- 7 stages, footing through final
- Who inspects
- Code Official or approved third-party inspector
- Scope
- Unincorporated county; municipalities may opt in
- Third-party notice
- 24-hour advance notice required
Summary
New Castle County requires a sequence of building-permit inspections, footing, foundation, framing, weather barrier, close-in, insulation, and final, before work can be covered up or the structure occupied.
Footing inspections shall be made after excavations for footings are complete and any required reinforcing steel is in place prior to the placement of concrete... Close-in inspection shall be made after the roof, masonry, framing, firestopping, draftstopping and bracing are in place in conjunction with any required approvals of the rough plumbing, mechanical and electrical inspections... Final inspection shall be made after the permitted work is complete and prior to occupancy.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 5).
Full Breakdown
The Code Official inspects work at seven defined stages under the Building Code: footing and foundation, foundation, exterior framing, weather barrier, close-in (covering rough plumbing, mechanical and electrical work), insulation, and final. Permit holders must notify the Code Official when work is ready, and no work may be covered or concealed until that stage is approved. A final inspection is required before a certificate of occupancy issues. This applies in unincorporated New Castle County, and may extend to an incorporated municipality only if that municipality's governing body formally elects to be included. Wilmington and Newark run their own separate building codes and are not covered here.
Violations & Fines
Covering or concealing work before the Code Official approves that inspection stage violates the Chapter. The Code Official may also suspend or revoke a permit issued in error or noncompliance, triggering additional inspection fees and administrative penalties.
Frequently Asked Questions
What building inspection stages does New Castle County require?
Does this inspection process apply inside Wilmington or Newark?
Who is allowed to perform the required inspections?
Sources & Official References
Other rules in New Castle County
Compare New Castle County to another location·View the Delaware building safety overview
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