Verified record
J.J. Donovan & Sons has been delivering heating oil and installing oil-fired heating systems out of Medford for over a century — the company traces back to 1923, when Jeremiah Donovan founded it in Somerville, and says it's now run by the fourth generation of Donovans, brothers Michael, Steven, and Jeffrey, since 2004. BBB lists it as an A+ accredited heating oil and heating-system contractor. Three written reviews on Google run from 2022 to 2025, alongside a 3.9-star average across 21 total ratings. Two of the three are five stars, from February 2022 and October 2023, both calling the service good without further detail. The third, from January 2025, described a different call — the person who answered seemed bothered by a boiler-service question, said service required buying oil from the company, and hung up when the caller said she didn't buy oil from them. For oil heat delivery, installation, or a tune-up in Medford or the surrounding towns, this is a long-established, family-run option — confirm up front how service is handled if the household doesn't buy its oil from Donovan, and get current appointment windows in writing.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from J J Donovan Sons Inc. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Was looking for a new company to service my boiler. The lady that answered the phone seemed bothered by my question. She said only if I bought Oil from them. When I told her I didn’t buy oil from them, she hung up on me.
Great customer service.
Great service.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Sep 8, 2026.
Honest pricing5.0
No hard sell4.8
Whole-house gut renovations4.4
Same-day water heater swap under other quotes4.0
Registry-verified HVAC licenseNot yet rated