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
A Saturday toilet problem brought Tandem Mechanical to one customer's home in 40 minutes; the customer says the toilet was fixed 20 minutes after arrival. Another customer says Sam responded promptly to a toilet issue and charged a fair price. Tandem's Westfield business handles plumbing as well as heating and cooling, and says it is family-owned and operated. BBB lists Josh Brennan as owner and a local start in 2016. A first-time homebuyer describes Josh and Sam servicing a boiler, arriving punctually and explaining the work before starting. The customer says they also addressed questions about two other issues. Another customer praises fast scheduling and installation of a water heater. In a February 2025 review, a customer describes a new HVAC installation and says the team explained their options at each step. A May 2025 reviewer describes two workers diagnosing an air-conditioning fault, getting a replacement part, checking two other units for the same condition and cleaning the filters in all three. Tandem's Massachusetts plumbing business licence is active. Google lists a 4.2-star average from 45 ratings; HomeAdvisor and Angi each list 4.9 stars from 33 ratings. Pricing and office interactions have drawn complaints. In February 2026, a caller describes a rude response to basic pricing questions. A November 2025 customer disputes a $1,200 bill, saying the work took about an hour with their own assistance and tools; they also describe the office interaction as rude. A November 2024 reviewer likewise complains about a rude response to an inquiry. Older installation complaints include a January 2022 review in which a customer says a city inspector told them their water-heater installation lacked a permit and was partly out of code. The customer also reports promised callbacks that did not happen. In an original December 2021 review, another customer describes an oil-to-gas boiler replacement and says agreed removal of the old oil tank was left unfinished. They arranged removal themselves for more than $600 after $500 had been withheld from Tandem's payment. An April 2023 update says problems with the boiler installation were discovered while preparing to sell the house; Josh then fixed them free despite the expired one-year labour warranty. The customer raised the review to four stars.
“A plumber for 20 years, he was a project manager for Tandem Mechanical and was known for mentoring apprentice plumbers.”
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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Certified attributes are verified against the public registry. Others are the business's own statement.
3 changes recorded — last scanned Sep 30, 2026.
Same-day shower repair4.4
A customer reports installation within five days4.2
Furnace swapped in under two weeks4.0