Cotti-Johnson
Company Overview
We understand the significance of effective planning and organization in our projects. This approach saves you money, enhances the final outcome, and ensures a seamless job site. We partner with you from the beginning to map out the job. Our mindset is always three steps ahead. Our professional estimating, project management, and production teams guarantee timely completion with uncompromising quality.
Cotti Johnson has been a trusted provider of reliable home services in the Greater Boston area for over 75 years. We specialize in air conditioning, heating, plumbing, and electrical services, ensuring your home stays comfortable and functional all year long. Our seasoned technicians deliver exceptional installation, repair, and maintenance services. If you need a new heating system, plumbing repairs, or electrical upgrades, Cotti Johnson is here to provide trustworthy and professional service, prioritizing your satisfaction. Trust us for all your home service solutions!
Adam and Angelo have led Cotti-Johnson/Middlesex Cooling & Heating for close to 13 years. We have a team of about 50 hardworking individuals, with some having been part of our family for over 30 years.
Business Services
- Bathtub installation
- Bathtub repair
- Circuit breaker installation
- Circuit breaker repair
- Doorbell installation
- Doorbell repair
- Drain installation
- Drain repair
- Electric inspection
- Electric installation or replacement
- Electric panel installation
- Electric panel repair
- Electric repair
- Wire installation
- Wire repair
- Electric vehicle charging station installation
- Faucet installation
- Faucet repair
- Garbage disposal installation
- Garbage disposal repair
- Generator installation
- Generator repair
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- HVAC installation or replacement
- HVAC system repair
- HVAC system maintenance
- Light fixture installation
- Light fixture repair
- Outlet installation
- Outlet repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe repair
Business Location & Hours
| Mon: | 7:30 AM - 8:00 PM |
| Tue: | 7:30 AM - 8:00 PM |
| Wed: | 7:30 AM - 8:00 PM |
| Thu: | 7:30 AM - 8:00 PM |
| Fri: | 7:30 AM - 8:00 PM |
| Sat: | 8:00 AM - 8:00 PM |
| Sun: | 8:00 AM - 8:00 PM |
Recommended Customer Reviews
Don't waste your time or money. I signed up for their Cotti Care Plan in the Summer of 2022. They were supposed to come and service my AC in July 2023 but no-called no-showed not once but twice. In between I had an electric emergency - sparks coming from the control panel - and they refused to send someone that day. I ended up going with a different company who came immediately. They're nice enough on the phone but when it comes to holding up their end of the agreement you will be disappointed and left wondering what happened
Called Cotti Johnson to quote wiring a four zone mini split heat pump that I installed myself at my home. They came and quoted $2600.00 for the job. He explained it would take two people a day to do the job. I made the mistake of giving a $800.00 deposit. That same day another electrician called and gave me a quote for $860.00. The next day not even 24 hours later I called Cotti Johnson and canceled the work with them. The office help told me they already ordered material for the job and would deduct $160.00 from my $800.00 deposit and mail me a check for $640.00. Two weeks later the second electrician showed up (one person) and did the whole job in three hours start to finish $860.00.My lesson learned here is don't be too quick to hire just anyone. Get as many quotes as you can.
JT came out for an emergency call concerning a faulty light switch, and was not only great at his job, but he was nice. He also took the time to answer all my questions.
I also appreciated the manager's quick response, and how nice he was.
I definitely recommend this company!
I've used these guys for various repairs and maintenance of the years, so I can only speak to that. Every engagement I've had with them has been fantastic and they get people out to me quick. I don't know what's going on with these other people but from a maintenance\repair perspective (mostly HVAC and drain cleaning) I've been extremely pleased.
Andre C.I am completely outraged with this service.
I called them to have my furnace tune up done before winter. Two technicians came out and started working on my furnace.
After they completed the service they addressed some issues they found with the system that were not critical.
Their ""thorough"" inspection of the system also included checking the pressure relief valve, which they stated to be ""in good shape"".
After reinspecting their work I found that the pressure relief valve was completely stuck frozen shut!?
THEY HADN'T CHECKED IT AT ALL
I can't believe both technicians completely disregarded checking a VERY IMPORTANT SAFETY FEATURE!
And then they lied in their work report stating that the ""relief valve is in good condition"".
Their negligence came at the cost of my safety because a stuck closed relief valve could have led to a DEADLY EXPLOSION!
I called an actual diligent plumber who replaced the relief valve for me. He was in shock that the Cotti Johnson technicians were so careless!
If you had work done by these guys make sure you get a real plumber to check their work! I warned you.?
They were very fast at responding and having a experienced tech come out. Tech and sales guys were respectful and knowledgeable BUT they quoted me 14,000$ for a new oil furnace. Got other quotes and they were way more than all the other companies. I got a better furnace replacement for half of what I would have paid going through cotti. Again their tech was great and knowledgeable and everyone was very helpful but 14k for an oil furnace install is absolutely over priced.
Kenny D.The positive: the HVAC system itself that they installed seems to be working fine. They also make financing fairly simple. They were also very responsive initially. But after they started the work the responsiveness ceased. They initially told me I didn't need my ducts replaced, even though the existing ducts in the house hadn't been used for years if not decades. I initially agreed to save an extra $2k, but once they started doing the work I decided to just get the ducts replaced too. I called the guy I was working with twice and left voicemails but he never called back. There was also an issue where the sales guy I worked with didn't share information with the installation guys about which electric heaters I wanted to keep installed. This resulted in them having to stay a little longer to re-do some work, and they were clearly frustrated. The guys on site finished the job and left. A couple weeks later I reached out to the company and left an e-inquiry to again request the duct work but got no response. I then called a different company who came out and did the work. They were shocked Cotti even said they could be re-used because they were in bad condition and filled with mice droppings and nests. No wonder I started getting foul smells in the house once the HVAC started blowing! I hoped Cotti would be my go-to company for HVAC work as well as future generator installation but, unfortunately, I don't think I can count on them at all.
Bob R.I had this company come out to do annual service on boiler, while there i showed him a shower that I wanted installed and asked for a quote. They got back to me two weeks later with quote, it was expensive but I figured they have seen the job so shouldn't be any surprises. Tech came out to do Install (I re arranged work and kids coverage to meet him that day) and after 30 minutes there the tech said he was unable to do the job. The company never followed up or returned my calls/emails.
Mary B.Had a couple minor electrical issues...flickering light, non-working outlet. Electrician came out within a couple days, fixed the issues quickly and the cost was very reasonable.
The service was great. The telephone communication was accurate. The professional service and friendly electrician was great. He explained everything to me. Did a complimentary examination of my electrical panel and exterior wiring. Gave me 2 detailed work estimates. Was thorough and explained his finished job.

























