Dunphy Plumbing & Heating is a one-man Cape Cod plumbing and heating outfit run by Bill Dunphy from 7 Terry Lane in West Harwich. He holds Massachusetts plumber license 31699-PL-J, verified active in the state registry under his own name — and the same number is printed on the company's own website, so the credential lines up on both sides. The work he lists is the bread and butter of Cape plumbing: general repairs, water heaters, boilers and furnaces, gas lines, air conditioning, and bathroom remodels, for both homes and commercial properties in Harwich, Dennis, Chatham, Brewster and Yarmouth.
The strongest independent signal is a 2025 comment on a Cape Cod plumber thread, where a homeowner wrote: "He helped us out with our instant hot water heater not working properly. Smaller company, very personable, honest, and our experience of the work has been great." That is one voice, not a body of reviews — there are no customer reviews on Angi, HomeAdvisor or BuildZoom, all three of which list the business as new or unreviewed.
What fills that gap is a permit record. BuildZoom shows 21 permitted projects, weighted toward gas work, water-heater replacements and plumbing permits in South Dennis, West Dennis, Chatham, Harwich, Eastham and Yarmouth Port, with older jobs in Attleboro and Boston. That is a verifiable trail of real jobs in the towns the business says it serves, even though the BuildZoom score attached to it is derived from permits, not from customers.
Two things are worth asking about before booking. The company's own site advertises 24/7 emergency service across Cape Cod, while its Angi and HomeAdvisor profiles answer "No" to whether it offers emergency services — confirm directly which is true if off-hours coverage matters to you. And the "20+ years" the site advertises is framed as hands-on experience rather than a company founding date, so ask how long the business itself has been trading if tenure matters.
This is a sensible call for a Cape Cod homeowner who wants the owner himself on a water heater, gas line or boiler job and is comfortable judging a contractor on one detailed recommendation plus a public permit history rather than a wall of reviews. Angi and HomeAdvisor both record that free estimates are offered, so a quote costs nothing to obtain.