What Are Delaware Impact Fees?
Delaware's three counties each handle growth charges differently: New Castle County collects sewer connection and capacity charges, Kent County levies sewer fees alongside municipal utility charges, and Sussex County — the state's growth engine — charges sewer system connection fees across its expanding districts. School impact fees apply in parts of the state through voluntary assessment agreements.
With only three counties, the bigger variation is between municipal utilities and county sewer districts. Delaware figures on impactfees.org are model estimates calibrated to community size and statewide costs — confirm district-specific connection charges before finalizing a budget.
Delaware figures are illustrative estimates from our statewide cost model — calibrated to local construction costs and community size — rather than verified fee schedules. Use them for early budgeting and site comparison, and see our methodology for how estimates are built.
Counties Covered
Our calculator covers all 3 Delaware counties:
Click any county to open the calculator pre-loaded with that jurisdiction.
Major Delaware Markets
Click any market to open the calculator pre-loaded with that city.
Wilmington / New Castle
County sewer capacity and city utility charges lead one-time costs.
Middletown / New Castle
Southern New Castle growth brings sewer expansion and school charges.
Dover / Kent
Municipal electric, water, and sewer connection fees shape budgets.
Milford & the beaches / Sussex
Coastal Sussex growth drives sewer district connection charges.
How the Calculator Works
- Pick your development type — Single-family, multifamily, commercial, industrial, or office.
- Search or pin your site — Enter an address or drop a pin anywhere in Delaware.
- We identify the jurisdiction — City, county, and state are resolved automatically.
- Get an instant breakdown — Water, sewer, road, park, school, and fire fees by category — verified where researched, clearly-labeled estimates where not.