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Deck Mechanical Plumbing & Heating, LLC holds a New Hampshire HVAC licence, number MBE0003280, which is active on the state registry with the company as the holder of record. The company says it has provided sales, service and installation for more than 30 years. In a 2023 review, a customer said Eli Margolis came at the end of his work day, stayed late and got a newly delivered stove hooked up after other plumbers said they were busy. In a 2025 review, a customer with a plumbing issue said Eli walked them through the solution over the phone, and they fixed the problem themselves.
I recently had a plumbing issue and reached out to Eli. Even with a full schedule, he took the time to walk me through the solution over the phone. Thanks to his clear instructions, I was able to fix the problem myself. I really appreciated his honesty and willingness to help. I highly recommend Eli for any plumbing issues or projects you might have. :)
We called Eli Margolis with an urgent problem, our new stove was delivered but we were having difficulty getting it hooked up. He came at the end of his work day, stayed late, and got the job done. He had a "can do" attitude throughout the whole visit, and clearly knew what he was doing. When every other plumber told us they were busy, Eli really went out of his way to help.
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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 Deck Mechanical Plumbing & Heating Llc. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700
