Corso Plumbing & Heating, Inc

Building permits tell you more about this Haverhill shop than its reviews do. BuildZoom counts 112 permitted projects under Matthew Corso Plumbing & Heating Company, about 15 of them in the last three years, at a typical permit value near $22,500. That is commercial-scale plumbing, and the company describes itself the same way: plumbing and heating for commercial, multi-residential, life science, healthcare and industrial buildings across Massachusetts and New Hampshire, design-build work included. It says it has been doing this for roughly 20 years. The licensing is the part that holds up to checking. Its Massachusetts plumbing license, 3805-PL-C, is active on the state registry. Beyond that, the company states master plumber and gas fitter credentials in both Massachusetts and New Hampshire plus a medical gas certification, all of which are its own claims rather than anything confirmed against a registry. BuildZoom's license list is messier than the company's: alongside a plumbing business entry it shows an older master plumber number carrying a 2016 expiration, and one entry it says was at some point cancelled. Homeowner opinion is close to nonexistent. Google shows 5 stars, but from only four ratings, and BuildZoom has collected none. Four ratings cannot carry a rating the way a few hundred can, which is why the number above stays cautious no matter how clean the license reads. This is a fit for a property manager, business owner or general contractor lining up licensed plumbing, gas piping or medical gas work on a commercial, healthcare or multi-residential building. That is what the company presents and what its permit history shows. Before you sign anything, confirm they take the kind of job you have, and ask which license numbers currently stand behind the work given the mix of numbers listed under their name.