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Basement Finishing Project Costs in Massachusetts

What Massachusetts owners actually declared on 91 recent basement finishing building permits in our dataset — public-record values, not quotes.

$50,000
Median project value
$23,000–$88,444
Typical range
91
Permits analyzed

Owner-declared values from public building-permit records, residential-scale projects only (commercial and out-of-scale outliers excluded) — a benchmark, not a substitute for a contractor quote.

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FAQ

How much does a basement finishing project cost in Massachusetts?

Across 91 recent Massachusetts building permits that declared a value, the median basement finishing project value is $50,000, with a typical range of $23,000 to $88,444. These are owner-declared values from public permit records, not quotes.

Where does this cost data come from?

Every figure is the declared project value on a real building permit filed with a Massachusetts building department — public records MassPermits aggregates, not estimates.