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Addition Project Costs in Lexington, MA

Planning addition work in Lexington? Here is what recent Lexington homeowners actually declared on their building permits — real public-record values, not quotes.

$222,450
Median project value
$159,050–$731,160
Typical range
10
Permits analyzed

Figures are owner-declared project values from public Lexington building-permit records — a useful benchmark, not a substitute for a contractor quote.

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FAQ

How much does addition work cost in Lexington, MA?

Across 10 recent Lexington building permits that declared a value, the median addition project value is $222,450, with a typical range of $159,050 to $731,160. These are owner-declared values from public permit records, not quotes.

Where does this addition cost data come from?

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