Callahan A/C & Heating Services, Inc.

Ninety-two permitted projects and not a single customer review — that is what Callahan A/C & Heating Services looks like from the outside. The company works out of 91 Belmont St in North Andover; BBB dates the business to 1994, shows it incorporated in 2012, lists 20 employees, and names Kate Callahan as president. The work itself is ductwork and mechanical systems. Porch describes a full-service HVAC and plumbing-mechanical contractor taking both residential and commercial jobs, listing air and water systems balancing, duct cleaning, attic ventilation and insulation, and backflow preventer installation; BuildZoom files the same company under HVAC, sheet metal and mechanical work. Permits are where this company leaves its trail. BuildZoom counts 92 permitted projects, about nine of them in the last two years, with a typical permit value near $22,650, and gives it a score of 103. That score comes from permit history rather than from customers — BuildZoom states plainly that it has received no reviews for the company, and no star rating turned up anywhere else either. Credentials are the thing to sort out before booking. BuildZoom lists eight records across six types — sheet metal, plumbing, pipefitting, refrigeration, plus a City of Newton sheet-metal registration — with several marked inactive or at one point cancelled, one "Verified License" carrying no number, and licence 2840 appearing twice: once as an active Plumbing Corporation licence with a May 2014 expiry, once as a cancelled Plumbing Business licence. Those are BuildZoom's entries, not a state check, and one of them has not been looked at since January 2010. Its BBB page carries an A+, on a profile that also states the business is not BBB accredited — two separate facts worth reading separately. This is a long-established mechanical shop with a real permit history and no public customer record to weigh it against. Ask for the current licence numbers, verify them yourself with the Commonwealth's e-licensing board, and ask for references from recent jobs in your town rather than relying on directory badges.