New Castle County Home Building Costs
2026 construction cost estimates for New Castle County, Delaware. Population: 570,000.
County $/sq ft
$207
Delaware avg: $197
vs State Average
+5%
Local market premium
2,000 sq ft home
$414,000
Mid-range estimate
Local Market Factors
- ›Wilmington metro
- ›Most expensive in state
- ›DE has no sales tax (saves ~2% on materials)
Cost by Home Size in New Castle County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $76,524 | $103,500 | $140,936 |
| 1,000 sq ft | $153,048 | $207,000 | $281,872 |
| 1,500 sq ft | $229,572 | $310,500 | $422,809 |
| 2,000 sq ft | $306,096 | $414,000 | $563,745 |
| 2,500 sq ft | $382,620 | $517,500 | $704,681 |
| 3,000 sq ft | $459,144 | $621,000 | $845,617 |
| 4,000 sq ft | $612,191 | $828,000 | $1,127,489 |
| 5,000 sq ft | $765,239 | $1,035,000 | $1,409,362 |
Costs are estimates only and represent construction costs, excluding land, architect fees, permits, and landscaping. Add 30–40% to these figures for total project cost.
County multiplier of 1.05× applied to Delaware state average (which itself is 1.05× the national average of $188/sq ft).