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"DO NOT HIRE FOR HVAC. Cotti Johnson has been the single worst contractor I have ever dealt with to date. If you have a simple HVAC repair, they may be able to do it but it's a gamble. If you have a large HVAC related work to be done, do yourself a favor and hire a company that understands the equipment they're dealing with. Where to start... I hired Cotti-Johnson to replace my old oil boiler with a modern heat pump system as the main source of heat for my house. Thomas Kelly, who was the initial person that came and made recommendations on the replacement system, should not be in the business of recommending heating systems to people. First of all, there's no heat load calculation of any kind, which is the first red flag but I didn't know any better at the time. They simply guess based on the size of the house without knowing a single thing about insulation or any other factor. Second mistake was recommending a single indoor head for an entire first floor that's separated by stairs in the middle of it. My initial concern with this was dismissed by Thomas who simply said "just give it a try!" Unfortunately, we're now stuck in a position where we can not remove the old boiler because the new system simply can not heat our first floor evenly. We have hot side and cold side and unfortunately our dining room is now permanently cold. It has been months of unanswered calls and emails and numerous back and forth to come up with a solution with still no end in sight. They do not return calls. Third mistake was installation. It took weeks to convince Cotti-Johnson and countless ignored calls and emails to get them to fix a mistake they made with the original install. Even then, they had to make multiple trips to finally realize they didn't account for line lengths accurately and undercharged the system. They finally did admit this and properly charged the system. They simply did not know how to deal with the equipment they're installing. I had to ask for proof of exactly how much refrigerant was being added in order for them finally do a proper calculation and add correct amount of refrigerant. Hire a diamond certified contractor if you want a Mitsubishi system and do not want to deal with these kind of amateur mistakes. Even after they finally did charge it to seemingly proper levels, they never installed back the brass screw caps for the outdoor unit or put the cover back on all the way. All around careless and amateur work. To add more insult to injury, I have been trying to get in touch with Cotti-Johnson for over 3 months for correcting inspection results and so far all of my calls and emails have been ignored. Learn from my mistakes and avoid this company at all costs."

"Went very well and got more information than with other companies."

"Excellent! Gil was fantastic and his team did everything to plan and the workmanship is terrific - the renovation exceeds our expectations in every way. Gil worked to the budget and we had discussions if we wanted changes made/additions. I highly recommend New England Carpentry."

"Excellent - highly recommend"

"Luis is far more than we expected . He has done work for us over 6 months and we found him to be highly reliable (does what he says, when he said it) and is very reasonable in his pricing. He is a pro who leaves the work area cleaner than he found it and does a meticulous job. His skills are many. For us, everything from mounting assist bars in the bathroom to weather stripping the doors to changing lightbulbs, replacing Shower door seals , remounting closet and cabinet doors, and the myriad of other things that happen over ten years of living. His painting work is precise and thorough. I would recommend Luis and his band of associates to do any work up to general contracting, confident in his work."

"We hired PW DiMasi to install receded lighting in an upstairs office and could not be happier with the results. Peter, the owner, was prompt in scheduling a time to provide a project estimate and quoted us a fair price. He also showed up on the day of the project to introduce the two electricians that would be doing the work. The team was courteous, professional, and did a great job installing the lights. They also were careful to cover the room with tarps to minimize dust and cleaned up the workspace afterwards. If we have a future need for an electrician, PW DiMasi will be our first call."

"The initial build went reasonably well. We did find problems which they did come back and fix. I noticed a railing support that was cracked. I was told that I must of done it, that was that. The plugs that cover the screw holes in the stairs are falling out. I looked for some at Home Depot, but couldn't find the right color. I still had Chase's cell #, so I texted him and asked if he could send me some plugs, and I would do it myself. No response. Tried again the next day, still no response. I'm not surprised. Aging the build was decent, price was higher than most. Now that nearly 2 years have gone by, and customer service should be anticipated, nothing. Never again."

"The quality of the work is outstanding as was their assistance with design and choosing affordable and quality materials. They were reliable, prompt and always responsive and we highly recommend them!"

"Mike is engaged and passionate about renovations. It shows! Always responsive, his clear communication makes for a great experience. He is honest and direct."

"George and his team is very helpful. Their work was done fast and professionally. George gave me very seasonable price. I will hire them again if I need any electrical help."