Verified record
Typical your area range for this kind of work, from regional averages — not a quote from Granite State Plumbing & Heating, LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$290 – $710
Typical plumbing job around $500
Granite State Plumbing & Heating describes itself as a commercial and industrial mechanical contractor in Weare, NH, marketing commercial HVAC, commercial and industrial plumbing, mechanical systems design and preventative maintenance to business and institutional customers across New Hampshire. The company says it was incorporated in April 1983 and is now a wholly-owned subsidiary of Comfort Systems USA, with Ken Duchesne as CEO/President. Its New Hampshire plumber license, MBE0000370, is active on the state registry. Brentwood Dental Designs, a client for over 13 years, says that when its hot water tank needed replacing on short notice, the company sent John over to assess it, and a technician was scheduled to handle the installation and clean up aging water lines. A commenter on r/newhampshire says they used the company for a lot of system replacements when they worked in-house maintenance. In 2025, a customer said that after a late-night plumbing issue, someone was dispatched at 10:30 that evening to their apartment near Pinkerton in Derry. A 2023 customer said several emails and calls went without a response.
“Granite State Plumbing and Heating, I used them for a lot of system replacements when I worked in-house maintenance.”
“Granite State Plumbing and Heating, I used them for a lot of system replacements when I worked in-house maintenance.”
“Granite State Plumbing & Heating of Weare said it is owed $338,149.38 for work done in phases at GT Advanced's Daniel Webster Highway complex, according to court records.”
We’ve been clients of Granite State for over 13 years, and they have consistently been outstanding. Most recently, we needed to replace our hot water tank on short notice, and they responded immediately by sending John over to assess the situation. From the start, John was a pleasure to work with—extremely knowledgeable, professional, and thorough in explaining everything. He helped us quickly get the order placed and scheduled a technician to handle the installation and clean up our aging water lines. During the installation, we had an issue on our end with a water shut-off (completely our mistake), which resulted in John and Gabe getting unexpectedly soaked. Despite that, they handled it with total composure, maintained a great attitude, and kept working until the job was done. Their professionalism, patience, and kindness truly stood out. We’re incredibly grateful for their dedication and highly recommend Granite State to anyone in need of reliable, high-quality service. Thank you again! — Brentwood Dental Designs
They have great prices and great service. What else can you ask for.
I was stuck in my home and attempting to shovel with a bad wrist and back when a member of the Granite State team stopped and took time out of his day to help with remove the snow with his four wheeler. It didn’t just make my day, it saved me a lot of pain and trouble. Thank you so much. Anybody with a team like that is truly somebody worth doing business with. I didn’t catch your name, but Thank you!
Nice people
I had a pretty nasty plumbing issue late at night. I got a call from Granite State and they dispatched someone late that evening at 10:30. I want to say his name was Julian. He came to my apartment near Pinkerton in Derry and was very polite, very helpful and overall very urgent. On top of that, I accidentally called him today, but hung up immediately. He then made sure to call me back and check up on me to make sure nothing had gone wrong. That is above and beyond service! Thank you very much!
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2 changes recorded — last scanned Sep 30, 2026.
Water heater work5.0
Multi-zone heat pump design for older homes5.0
Leaking water heater replaced that same day4.9
Fast emergency response4.9
Dual-state active licensing4.7