Customers consistently praise the company for punctual arrivals, detailed energy assessments, and clear explanations of insulation and heating options. Positive feedback highlights professional conduct, thorough inspections, and helpful guidance regarding Mass Save rebates and system efficiency. However, several low-star reviews criticize the business for poor communication, including vague documentation, unreturned calls, and scheduling errors that left customers without confirmed appointments.
Google rating: 5.0 out of 5 from 344 reviews (98% five-star).
Reviews on this page: 344 Google reviews (288 with written comments, 3 with photos).
Owner responses: the business replied to 58% of reviews.
Most recent review: October 26, 2026.
Service: Water Treatment Service serving Everett, Massachusetts.
Data from Google, last updated October 27, 2026.
Photos
Customer reviews
5.0
★★★★★
344 reviews on Google
5★337
4★3
3★1
2★0
1★3
Reviews from Google, shown as published (original wording, unedited).
What customers talk about
We read 288 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“The install was clean and professional, and they left the space spotless.”
“Excellent detailed and thorough assessment of the house insulation.”
“Terrible customer service.”
“They showed up on time, explained the options clearly, and walked us through how the new system works.”
“Got everything done super quick, and walked me through what I could get done and also went out of his way to explain things to me.”
“I'd highly recommend Colt to anyone in the Middlesex county area looking for a tankless water heater or plumbing work.”
“Well worth it, thank you!”
“I had heard that prices for things like insulation were often inflated due to MassSave, but this company seems to operate honestly.”
People customers mention
Sanchez34 reviews
Save26 reviews
Joe15 reviews
Frasso9 reviews
Jose9 reviews
Dave6 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Jobs customers hired them for— from Google's service tags and the review text
Team members customers mention
Filter by topic— each topic is highlighted in the reviews in the same color
Hannah Nicholl2 reviewsiTotal number of Google reviews Hannah has written across all businesses on Google Maps, not just this one.
Colt Home Services installed a new tankless water heater in our home in Weston, and the whole experience was great. They showed up on time, explained the options clearly, and walked us through how the new system works. The install was clean and professional, and they left the space spotless. We've had endless hot water ever since and are already noticing the energy savings. Communication was easy from scheduling to the final walkthrough. I'd highly recommend Colt to anyone in the Middlesex county area looking for a tankless water heater or plumbing work.
Price assessment: Great price
Services: Water heater installation
Aaditya Malapati11 reviewsiTotal number of Google reviews Aaditya has written across all businesses on Google Maps, not just this one.
Both Joe and Colt were great doing my energy and insulation audit. They couldn’t have been more professional and knowledgeable. They arrived on time and really explained all the benefits for insulation and heat pumps. I had no idea how much energy was wasted with my current setup. I really benefited from their assessment. I would highly recommend their services for anyone interested in cutting energy waste!
Response from the owner · a month ago
Hi Jonathan
Thank you for the positive review of us conducting your Mass Save Home Energy Assessment and doing your home insulation.
Brian LeBlanc1 reviewiTotal number of Google reviews Brian has written across all businesses on Google Maps, not just this one.
Joe Frasso was amazing! he was extremely knowledgeable and helpful, especially as a first time home buyer with an older house he was able to help even further beyond his services ultimately saving me hundreds. will 100% using him again when needed.
Price assessment: Reasonable price
Services: Service not listed
Response from the owner · a month ago
Hi Casey
Thank you for the positive review of us conducting your Mass Save Home Energy Assessment!
Trish Ridge8 reviewsiTotal number of Google reviews Trish has written across all businesses on Google Maps, not just this one.
Joe came by and walked through every thing in great detail. He showed us all the ways to make the house more efficient and when they came to install the insulation the crew was amazing and respectful.