Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Tandem Mechanical. 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
Tandem Mechanical is a family-owned and operated company in Westfield that says it handles residential and commercial plumbing, drain, heating, cooling, water-heater, well-pump, water-quality, and mechanical work. Its stated service mix includes HVAC and plumbing, and its website identifies it as a Mass Save Heat Pump Installer Network Participant. The company is run locally by Josh Brennan, according to BBB, which lists the corporation as starting in 2016. Customers repeatedly describe prompt, knowledgeable work across plumbing, heating, cooling, and water systems. Recent reviewers mention boiler service, water-heater installation, toilet repair, drain clearing, and HVAC work; one emergency toilet call received a response within 40 minutes. Several reviews specifically praise clear explanations, communication, and professional installations. An HVAC customer said the crew explained each step of a new system, while another praised rapid help during an emergency. There is also a documented service concern to discuss before booking. A February 2026 reviewer described a rude pricing call, and a 2025 reviewer raised concerns about a prior water-heater installation, including a missing permit, an out-of-code portion, and slow follow-up. A 2021 review later described a boiler issue that the owner corrected without charge. These accounts are not consistent with the larger body of positive reviews, but they make it sensible to confirm the scope, permit handling, code compliance, and who will handle follow-up. Tandem looks suited to homeowners needing responsive plumbing, drain, water-heater, heating, or HVAC help, including urgent repairs. Before work begins, confirm the written price, permits, code-compliance responsibilities, warranty terms, and the specific license covering the job; directories list plumbing license 4714 and 16893-PL-M, while BuildZoom also says one listed license is not required.
I always try to support small, local businesses whenever I can, and this was an overall great experience from start to finish! They were incredibly helpful, knowledgeable, and genuinely took the time to make sure I understood everything. I never felt rushed or like I was just another customer. They went above and beyond to answer my questions, explain the products and services, and provide helpful information that I can actually use. It’s not every day you come across a business that is this friendly, informative, and willing to go the extra mile. You can tell they truly care about their customers and take pride in what they do. I highly recommend giving this local small business a try. They were beyond helpful, and I’m very happy I reached out to them! Supporting local businesses is always a win, especially when you find one this good!
Sam from Tandem Plumbing responded promptly to fix an issue with my toilet, and the entire job was handled with great professionalism. He has a reassuring and approachable manner that made the experience stress-free. I was also pleasantly surprised by how fair and reasonable the pricing was. I only wish I’d called sooner!!!
I am a first time home buyer and not familiar with the boiler/heating system in my home and was apprehensive about finding a service provider to service my boiler. I def. made the right choice choosing Tandem Mechanical to service my boiler system. I needed my boiler serviced and Josh and Sam arrived today and serviced the boiler in a professional manner. Josh explained everything they were going to do before they started work. They were punctual, professional and went above and beyond. They also addressed questions I had on two other issues, one which could have been a problem later on if not addressed. I was very impressed with these guys and also the lady I spoke with re: setting up the appointment. Thank you TM! Much appreciated.
Highly recommend this plumbing company! They were extremely friendly, knowledgeable, and helpful from start to finish. They took the time to explain everything clearly and made sure the job was done right. Everything was handled in a timely manner, and the whole experience was smooth and stress-free. They were professional, responsive, and easy to work with. Definitely a great first choice if you need reliable plumbing work!
Had my water tank go on me this past weekend memorial weekend at that! But fortunately i was covered 100% by warranty and tandem mechanical was the company the insurance sent my way Viktoria was great in communication with me explaining everything from start to finish even offered to come in on that very same weekend her crew of guys please don’t be taken back they are young but very smart educated and well prepared for the job very knowledgeable and knew exactly how to get the job done Sam took over and he finished the job due to one of the guys who had to leave early (no waiting he did not leave or stopped working until Sam got there)Sam took his time and made sure everything was put back in order he was kind enough to accompany me to the store to make the exchange return yesterday was very hot he did not once complained very patient and i think that is very important in jobs like these. I will be using them again i couldn’t be happier with their service from start to finish thank you all! Keep up the amazing work!
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1 change recorded — last scanned Aug 28, 2026.
Transparent diagnostics5.0
Repeat, years-long customers5.0
Decades-long customers5.0
Honest, no-upsell service5.0
Honest pricing5.0
Same-day AC fixes during peak heat waves3.8
State-verified HVAC license3.7