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Mark Dubois Custom Carpentry describes itself on its website as specializing in home improvement services, and says Mark has decades of experience in residential construction. Mark Dubois holds Massachusetts home improvement contractor registration 159195, active on the state registry. It holds 5 stars from 1 rating on Google.
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2 changes recorded — last scanned Sep 22, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Mark Dubois Custom Carpentry. Use it to sanity-check bids, then get the real number in writing.
A typical single-level deck is 12×16 — about 200 sq ft.
Estimated range
$7,750 – $14,500
Typical carpentry project around $11,100
Came back to fix deck stairs years later5.0
Decks and porches5.0
Custom sheds5.0
In-law cottage addition management4.9
