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§ 02
When a permit is required
Permit triggers and exempt work for Wilmington
New structures, structural modifications, demolition, re-roofing, commercial window replacement, and electrical/plumbing/mechanical work (even repairs).
Interior painting
Minor roof repairs involving less than 100 sq ft of drywall
Carpeting and floor underlayment
Plumbing fixture replacements with no in-wall changes
Residential vinyl window replacements in 1- and 2-family homes (Historic Districts excluded)
Storm doors and front doors (permit required in Historic Districts)
Downspouts and gutters (permit required in Historic Districts)
Small drywall repair less than 100 sq ft or 3 sheets, not affecting a structural or fire-rated wall
- Exempt Interior painting
- Exempt Minor roof repairs involving less than 100 sq ft of drywall
- Exempt Carpeting and floor underlayment
- Exempt Plumbing fixture replacements with no in-wall changes
- Exempt Residential vinyl window replacements in 1- and 2-family homes (Historic Districts excluded)
- Exempt Storm doors and front doors (permit required in Historic Districts)
- Exempt Downspouts and gutters (permit required in Historic Districts)
- Exempt Small drywall repair less than 100 sq ft or 3 sheets, not affecting a structural or fire-rated wall
Note: Properties in Historic Districts have additional permit requirements for many items that are otherwise exempt.
Required documents
- Building permit application
- Job valuation
- Site/plot plan
- Construction drawings (signed/sealed for commercial projects)
- Trade list
- Zoning approval
- Fire Marshal review letter for commercial projects
- Building code
- Adopts ICC Building Codes (edition not confirmed from public pages; the city references alignment with ICC codes). Contact L&I at (302) 576-3030 to confirm current edition.
- Permit validity
- Not specified in available public materials; contact (302) 576-3030.
- Owner-builder
- Not detailed in available public materials.
- Contractor requirements
- Not detailed on L&I public pages. City of Wilmington may have separate contractor registration requirements; confirm with the department.
§ 03
Application process
Typical processing: Not published. Contact (302) 576-3030 for estimates.
- 01 Prepare all documents: completed City of Wilmington Building Permit Application, job valuation and scope description, plans/plot plan if required, trade subcontractor list (plumbing, electrical, HVAC), and up to 3 signed/sealed plan sets for commercial work
- 02 Submit application online via the Munis portal, by email to [email protected], or in person at 800 N. French Street, 3rd Floor
- 03 Application is routed to appropriate reviewers: Zoning, Public Works, Historic District Commission (if applicable), Fire Marshal. Reviews may occur simultaneously or sequentially
- 04 Pay permit fees: by phone at (302) 576-2620; in person at the Department of Finance, 1st Floor, 800 N. French Street; or by mail to Department of Land Use and Planning with the application number noted
- 05 Once all reviews are approved and fees are paid, permit is issued
- 06 Schedule inspections 48 hours in advance through the online portal or by phone
- 07 Pass all required inspections and obtain Certificate of Occupancy or Certificate of Compliance
Typical processing time: Not published. Contact (302) 576-3030 for estimates.
§ 04
Fee schedule
Effective Current
Fee type
Amount
01
Plan check fee
Not separately identified; included in or alongside permit fee
02
Permit fee formula
Valuation-based: $12 per $1,000 of construction cost (building permit)
03
Trade permit fee
$20 each (Electrical, Plumbing, HVAC)
Pay by phone at (302) 576-2620, in person at Finance (1st Floor, 800 N. French), or by mail to Department of Land Use and Planning. Additional fees: Certificate of Compliance = $50; Temporary CO (commercial) = $250; Temporary CO (residential) = $100; Change of Occupancy = $100
Fees change periodically. Confirm at the official fee schedule ↗ (effective Current) before budgeting.
§ 05
Required inspections
Scheduling and sequence
How to schedule
- Munis Portal (online)
- (302) 576-3030 (phone)
- Scheduling deadline
- 48-hour advance notice required
- Inspection hours
- Monday through Friday, 8:30 a.m. to 4:30 p.m.
Typical sequence: Typical sequence: Footings/slabs (before pouring); foundation walls (before backfilling); plumbing, electrical, and heating rough-in; framing (before drywall); final inspection; Certificate of Occupancy or Compliance.
§ 06
Frequently asked
Common questions about Wilmington permits
01 Do I need a building permit in Wilmington, DE? ▸
New structures, structural modifications, demolition, re-roofing, commercial window replacement, and electrical/plumbing/mechanical work (even repairs).
02 How much does a building permit cost in Wilmington, DE? ▸
Building permit fees in Wilmington, DE are set by the local building department and vary by project type and valuation. Fees are calculated as: Valuation-based: $12 per $1,000 of construction cost (building permit). Plan check fee: Not separately identified; included in or alongside permit fee.
03 How do I apply for a building permit in Wilmington, DE? ▸
To apply for a building permit in Wilmington, DE, follow these steps: 1. Prepare all documents: completed City of Wilmington Building Permit Application, job valuation and scope description, plans/plot plan if required, trade subcontractor list (plumbing, electrical, HVAC), and up to 3 signed/sealed plan sets for commercial work 2. Submit application online via the Munis portal, by email to [email protected], or in person at 800 N. French Street, 3rd Floor 3. Application is routed to appropriate reviewers: Zoning, Public Works, Historic District Commission (if applicable), Fire Marshal. Reviews may occur simultaneously or sequentially 4. Pay permit fees: by phone at (302) 576-2620; in person at the Department of Finance, 1st Floor, 800 N. French Street; or by mail to Department of Land Use and Planning with the application number noted 5. Once all reviews are approved and fees are paid, permit is issued 6. Schedule inspections 48 hours in advance through the online portal or by phone 7. Pass all required inspections and obtain Certificate of Occupancy or Certificate of Compliance
04 How long does it take to get a building permit in Wilmington, DE? ▸
Building permit processing times in Wilmington, DE typically run Not published. Contact (302) 576-3030 for estimates.. Timelines can vary based on project complexity and current department workload.
05 What work is exempt from building permits in Wilmington, DE? ▸
Not all construction work requires a permit in Wilmington, DE. The following work is generally exempt: Interior painting; Minor roof repairs involving less than 100 sq ft of drywall; Carpeting and floor underlayment; Plumbing fixture replacements with no in-wall changes; Residential vinyl window replacements in 1- and 2-family homes (Historic Districts excluded); Storm doors and front doors (permit required in Historic Districts); Downspouts and gutters (permit required in Historic Districts); Small drywall repair less than 100 sq ft or 3 sheets, not affecting a structural or fire-rated wall. Note: Properties in Historic Districts have additional permit requirements for many items that are otherwise exempt. When in doubt, confirm with the local building department before starting work.
06 How do I schedule a building inspection in Wilmington, DE? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Wilmington, DE via: Munis Portal, (302) 576-3030. 48-hour advance notice required.
last verified April 2026
source Department of Licenses and Inspections (L&I); Land Use and Planning handles zoning and some plan review components ↗
entry id permits/delaware/new-castle/wilmington
Educational reference. Permit rules and fees change — confirm current requirements directly with Department of Licenses and Inspections (L&I); Land Use and Planning handles zoning and some plan review components before applying. Jaspector is not legal advice.