Verified record
Wilhelm Construction is a Holbrook, Massachusetts general contractor run by Jared Wilhelm, whose Massachusetts home improvement contractor registration is active. In an early-2026 review, a homeowner described adding a half bath and other work in their basement, saying the crew showed up on time, finished within the promised timeframe, and left them highly satisfied with the workmanship. Permit records show 35 completed or permitted projects. BuildZoom separately lists a Construction Supervisor license (CS-096387) for the business. BuildZoom also shows an older home improvement contractor number, 174302; that listing reads inactive, with the registration cancelled at some point. For a basement or bathroom addition on the South Shore, this is a licensed, actively working outfit — worth asking for a few more recent references given how thin the written review record still is.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Wilhelm Construction. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
Words cannot describe how happy we are with the work done at our home! We had a half bath added to our basement along with some other work in the basement. They showed up on time got the job done in the amount of time promised and their workmanship was absolutely amazing. Highly recommend!
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1 change recorded — last scanned Sep 16, 2026.
Structural kitchen work4.3
Responsive service3.3