How much does basement finishing cost in Wilmington?
Wilmington, DE · New Castle County · 10 ZIP codes · Data updated May 2026
A basement finishing in Wilmington typically costs $34,213 - $99,187, with most homeowners paying around $56,235. Wilmington sits right around the Delaware median, and quotes can vary up to 114% between its cheapest and most expensive ZIP codes, so the neighborhood matters as much as the contractor.
It's a strong investment here: homeowners in this region recoup roughly 76% of the cost at resale, about $42,739 on a typical Wilmington job.
November is low-demand season for basement finishing in this climate. Contractors in New Castle County are booking about 3.5 weeks out, and rates run about 8% below the annual average, a good window to book.
Wilmington Cost Range
$34,213 - $99,187
Typical: $56,235
Strong ROI
Equity Gain
$42,739
Added at resale
on a typical Wilmington job
Low season · ~3.5 wk contractor lead time
Basement Finishing Cost by ZIP Code in Wilmington
Each ZIP gets its own estimate from local home values and labor rates. Open yours for the full breakdown, seasonality, and ROI detail.
| ZIP | Estimated range | vs. city average | Details |
|---|---|---|---|
| 19801 | $34,213 - $46,288 | -28% | Full estimate → |
| 19802 | $34,213 - $46,288 | -28% | Full estimate → |
| 19805 | $34,213 - $46,288 | -28% | Full estimate → |
| 19804 | $36,656 - $49,594 | -23% | Full estimate → |
| 19809 | $42,033 - $56,867 | -12% | Full estimate → |
| 19806 | $45,943 - $62,157 | -4% | Full estimate → |
| 19808 | $48,875 - $66,125 | +2% | Full estimate → |
| 19810 | $61,583 - $83,318 | +29% | Full estimate → |
| 19803 | $66,959 - $90,591 | +40% | Full estimate → |
| 19807 | $73,313 - $99,187 | +53% | Full estimate → |
Frequently Asked Questions
How much does a basement finishing cost in Wilmington?
Based on 2026 data, a basement finishing in Wilmington, DE costs $34,213 - $99,187, with a typical price around $56,235. The range covers Wilmington's 10 ZIP codes and the ±15% variance between contractor bids.
Is a basement finishing worth it in Wilmington?
Homeowners in this region typically recoup about 76% of the cost at resale, roughly $42,739 on a $56,235 project. That makes it one of the stronger-returning projects you can do here.
Why do basement finishing quotes vary across Wilmington?
Local home values and labor rates differ by ZIP code. In Wilmington, the same project can cost up to 114% more in the most expensive ZIP than in the least expensive one. Check your exact ZIP below for a precise range.
Other Project Costs in Wilmington
Sources: Remodeling Magazine Cost vs. Value, Zillow ZHVI, BLS construction wages, US Census. Methodology