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Supreme Mechanical holds an active New Hampshire plumbing licence, MBE2301564, in the name of Supreme Mechanical, INC. It has a 5-star Google rating from 3 ratings. A customer who hired the company recently called Dave very knowledgeable and praised the communication. In a 2025 review, a homeowner said Dave and his crew installed their heat pump with the best quote and timing, and that a year later he fit them in the same day to set up a temporary kitchen sink, working around a template fitting and even coming in on a Friday, the crew's day off.
Very knowledgeable and easy to work with. Great communication all around I would highly recommend Dave!
Dave is a joy to work with. Professional and knowledgeable. He and his crew installed my heat pump, he gave me the best quote and timing. Year later I needed him on very short notice, to set up temporary kitchen sink, he squeezed me in same day. I was so grateful. couple days later I needed him to install a temporary sink. This all needed to be scheduled around a template fitting so timing was crucial he accommodated me even worked on a Friday, (their day off). Highly recommend
Extremely knowledgeable, professional, high quality work. Just all around great to work with. Highly recommend
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2 changes recorded — last scanned Oct 30, 2026.
Typical New Hampshire range for this kind of work, from regional averages — not a quote from Supreme Mechanical. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$240 – $580
Typical plumbing job around $410
Water treatment installs5.0
Prompt repair visits5.0
Water heater fix with hot water restored by 1pm4.9
