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When anything water related happens in their 34-year-old home, a recent Google reviewer wrote, the first thing they tell their husband is "call them." That reviewer said they come in a timely manner, every time. Cornerstone Plumbing, Heating, & Cooling lists its service area on its website as Farmington, Industry, Wilton, New Sharon, Chesterville and Temple. A 2025 customer said Cornerstone helped get their heater going and called the rates very reasonable. A 2024 customer said Cornerstone diagnosed and fixed problems left by another plumber, and took the time to walk them through the process step by step.
These folks are absolutely amazing. I cannot praise their work, courtesy, availability more! We are two retired navy warship drivers — we didn’t fix plumbing or do heating/cooling, etc. We drove ships. We ran combat. So when anything water related happens in our 34 year old home, my first comment to my husband is “call them”…because I don’t need us and our amateur selves flooding our basement (or worse). These guys take it in stride, come in an *always* timely manner and do fantastic and trustworthy work. If you live in their service area, call them first.
Cornerstone is a great company to deal with. They helped me get my heater going and their rates were very reasonable. I would highly recommend them to anyone.
Cornerstone is wonderful. I have the utmost respect for their work. They diagnosed and fixed problems left by another plumber, and took the time to walk me through the process step by step. I would definitely recommend them.
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1 change recorded — last scanned Oct 30, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from Cornerstone Plumbing, Heating, & Cooling. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,500 – $10,300
Typical HVAC project around $7,400
Boiler replacement with a stopgap fix first3.8
54 years in businessNot yet rated
