Local business · Mendon, MALocal business · PO Box 430, Mendon, MA
Verified record
J.J. Mechanical Services works out of Mendon, Massachusetts, and is listed as a mechanical, sheet-metal and HVAC contractor. The Better Business Bureau's file gives a start date of January 1994 and says the file itself was opened in 2007. What the company has to show for that time is a permit trail rather than a review trail: 30 permitted projects, weighted toward HVAC and sheet-metal work in Newton, Brookline and the towns around them. BuildZoom states it has received no reviews for the company, and the BBB has not rated it, citing a lack of information. Two things are worth raising before hiring. BuildZoom lists two City of Newton sheetmetal-contractor licences — one it labels "License Not Verified" with a last-seen expiration of January 2023, the other reported as inactive — while the same page carries an alert saying no active licence is on file. Directory licence records are frequently wrong or stale, so ask for the current licence and certificate of insurance directly rather than trusting either version. The two directories also attach different owners to the same phone number: the BBB names John Knox, BuildZoom names Joseph Guelli. For a homeowner around Newton or Brookline hiring for heating, cooling or sheet-metal work, this is a shop with a documented permitted history and no public customer feedback to weigh it against — reasonable to call, worth asking for references and current licence paperwork up front.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from J.J. Mechanical Services. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
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No changes recorded yet — last scanned Aug 3, 2026.
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