Hear what our customers are saying...we are proud to share their thoughts with you.

"We are very much happy and satisfied with your work. We greatly appreciate for your professional services. Thanks for your excellent work done per code. We request you to provide your great services when we need in future. Thanking you again and wish you feel better with your back pain."

Patel Family


"I just want to say how great they were!!! I called for my mother who had no heat and they came out the same day, at the time they said, went and got the part, and put it in the same day!!! I cannot say thank you enough for the service!!!"


Erin Kelleher


"Mr. Koval is a professional. He is prompt and reliable. Twice, Mr Koval responded to emergency situations, and he dealt with the problems effectively. Today the water to my home had to be shut off due to plumbing problems in my laundry. After that was taken care of he took the time to fix my laundry doors! All this was done at a reasonable rate. I would recommend Mr. Koval without hesitation."

Cheryl Holleman



“Koval Plumbing, Heating and Air Conditioning was the most professional and reliable contractor I have ever had work for me. Not only did they meet our schedule and budget, just as initially planned, but they exceeded all our expectations in their expertise and willingness to answer all of our questions and concerns."



...Not only did they meet our schedule and budget, but they exceeded all our expectations... Tyler T., Middlesex MA Leave A Review