We had our HVAC and tankless unit installed by MillTown in 2020 as part of a hydronic heating…read moresystem. A month ago, the commercial‑grade tank they installed failed. Rheem covered the tank under warranty, but MillTown charged $5,800 for the replacement which was essentially a retrofit with minimal changes. After reviewing the work, it was clear the job should have been closer to $3,000 based on industry standards and actual scope. Unfortunately, the workmanship was disappointing. The system was left in a condition that doesn't reflect professional standards -- including a drain valve positioned against another pipe, making it impossible to drain the system properly. I provided photos and a detailed email to Milltown expressing these concerns. Their response was that there "wasn't much to do," and they offered only a $500 credit toward a future service. Given the excessive pricing and the quality of work, a credit for a future service wasn't a reasonable solution, and I declined it. Another concern: their website offers no way to contact the owner or any managers directly. For a company that presents itself as family‑run, that lack of transparency says a lot. Overall, the experience was frustrating from the high cost to the poor workmanship to the dismissive response. Based on this, I cannot recommend MillTown for plumbing or HVAC services.

Called for maintenance on a tankless heater, needed a flush and a replacement ignitor. Both techs…read morethat arrived were very polite. First question was, why two techs for an easy PM? The lead tech tried to sell us a maintenance plan to get any kind of reasonable discount. Overall, I found their prices way to high. No thanks!! Milltown...people still work for a living. Merry Christmas Slower season? Isn't this heating season (busy)? Nobody wants to pay for you to train your staff.

Warley arrived on time, diagnosed and fixed the problem…read moreimmediately. He tested everything thoroughly. Would highly recommend him and Roto Rooter!

Jamie and her apprentice just left after doing a great job! They were on time, super competent, and…read morenice. They came in, figured out the issue, and had it fixed in no time. She even cleaned my sink basin! I didn't get her apprentice's name, but he/they were awesome! Will definitely use them again!

First time ever using Ostroski plumbing. Stephen the plumber arrived at my condo unit on time and…read moredid an excellent job fixing a bad clog in my kitchen sink and iinstalling a new garbage disposal as well.

I highly recommend Ostroski Plumbing! Greg was fantastic--honest, professional. Another Plumber…read more told me I needed to replace my entire hot water heater. Greg came by, quickly diagnosed the issue, and replaced the thermostat instead. The water heater is working perfectly now. He saved me a huge expense and didn't try to upsell anything. I'll definitely be calling Ostroski Plumbing for any future plumbing needs. Thank you, Greg!

These guys are the best. Had a main sewer line blockage shortly after wife being in hospital and…read morehouse company due soon. Panic! They sent a pleasant, personable tech to my house within hours and solved the problem. If you ever have a drain emergency these folks will address it in a competent, thoroughly professional manner.

Carlos (emloyee #325) Came to my house in Belmont and took pictures of my drain after my regular…read moreplumber could not fix the blockage. He found a blockage in my house drain and roots blocking town's portion of the drain. He used two attachments to clear both blockages. He then used a camera to assure both blockages were cleared. I found Carlos to be very knowledgeable and informative. I appreciate his hard work and will be surely using John's Sewer and Drain services in the future.

I needed a faucet installed. Chris did the job perfectly. On time and very pleasant. I would…read morerecommend Maxwell Mechanical

Came out on short notice to help me identify a leak in my basement! Great communication and easy to…read morework with. Will recommend to friends and family

Prompt friendly workers. Explained plan clearly, cleaned up after themselves and performed work…read morequickly.

This review is from quote to finished and completed work on mini-split heat pump (HVAC). Overall…read morewas great and would recommend! Quoting process was very thorough, and we went over almost all options possible. Pricing was not the cheapest but also not the most expensive based on a few quotes that we got. So from my experience you get great value for the service. Scheduling is mostly where my experience was missing that 5th star. Change in scheduling happened about 3 times and so you'll have to be a little flexible because during material and labor shortages due to covid, I'm assuming this where the challenges are. Installation was mostly all clean and went smoothly without any unforeseen issues. This was in about 4 parts: inside unit and compressor one day, outside and inside and basement lines one day, electrician assessment quick look one day, then actual electrician and final turning switch on. There was a very minor issue that we ran into a couple of weeks later but they were able to resolve it within 24 hours at no extra cost. (Covered under warranty)

worthless came out twice charged me over $750 to fix my furnace which was never fixed . they…read morecouldn't even figure it out. called a pro it was a $120 job . they wouldn't even come back for another three weeks.

Overpriced diagnostic work. Two guys came out who spent 75% of their time sitting in the van…read more Couldn't come up with a reasonable explanation or quote) even a simple quote for repair work. Would not use again.

Matt is a great plumber. My old plumber sold his business, I have tried many plumbers. Matt is the…read morebest one. He will be my plumber in the future.

Great experience! My poor dad's heater and water heater broke at the same time and I was looking…read morefor estimates. Matt was quick and professional and gave me a good recommendation on replacing our water heater with a trusted brand along with a reasonable price. He came through the next day and was did a great job in putting in the new unit. Their work comes with an one year warranty and the product has a lifetime warranty so we don't have to worry again for at least some time. Flexible, responsive, professional, and reliable. My dad is fully satisfied.

Buddy eEston my favorite plumber in lowell ma for over 20 years…read morealways on the ready Monika Patience

Had them come out to replace a water heater. Called them first thing in the AM (Monday morning)…read moregentleman picked right up and was at my door within the hour. First class service and a first class product. Would recommend them to anyone in the Chelmsford/Lowell area.