Deck Permit in New Castle County, Delaware
- Permit Required
- Yes
- Authority
- New Castle County
- Fee
- $12 per $1,000 of Valuation ($142 Minimum)
- Last Verified
- 2026-09-29
What the official source says
“Q. Do I need a permit to build a deck? A. Yes, a permit is required to construct a deck.”
newcastlede.gov
“The International Residential Code states that porches, balconies, or raised floor surfaces located more than 30" above the floor or grade below and at any point within 36" horizontally, shall have guards not less than 36" in height.”
newcastlede.gov
“Building Permit Fee: $12 per $1,000 of Valuation ($142 Minimum)”
newcastlede.gov
Verify before you build — primary source for this page: https://www.newcastlede.gov/DocumentCenter/View/32995/Deck-Permit-Requirements
Permit Requirements
Guards not less than 36 inches in height are required for porches, balconies, or raised floor surfaces located more than 30 inches above the floor or grade below.
Fees
$12 per $1,000 of Valuation ($142 Minimum)
How to apply
- Confirm the rules for your address with New Castle County — the official sources on this page are the place to start.
- Prepare a simple site plan or drawing showing where the deck work goes and its size.
- Submit the application and pay the permit fee.
- Schedule the required inspections and keep the approved permit on site.
More detail: our deck permit guide.
Building Department
New Castle County
Official Sources
FAQ
Do I need a deck permit in New Castle County, Delaware?
Yes. A permit is required for deck work in New Castle County. The official source says: “Q. Do I need a permit to build a deck? A. Yes, a permit is required to construct a deck.”
How much does a deck permit cost in New Castle County, and how long does it take?
Fee: $12 per $1,000 of Valuation ($142 Minimum).
Where do I apply for a deck permit in New Castle County?
Applications go to New Castle County.