Plumbing and heating services in Harwich, Cape Cod

Local help from someone who shows up.

Bill Dunphy in front of Plumber van in Harwich Cape Cod

A familiar face in Harwich

If you live in Harwich and need a plumber, we’re right nearby. Bill and his assistant are the ones who’ll come to your door. No strangers. No upsells. Just honest work from a local team who does this every day.

What we do

We handle a wide variety of plumbing and heating jobs on Cape Cod, including:
Icon of gas line

We’ve seen all kinds of Harwich homes

From old cottages in Harwich Port to newer builds off Queen Anne Road, we’ve been through it all. We’ve built a lot of trust in this area, and we’re proud of that.

Nearby areas we also serve

In addition to Harwich, Dennis, Chatham, Brewster and Yarmouth, we also work in surrounding towns like South Dennis, Orleans, West Harwich, and Yarmouth Port.

A look inside a recent water heater install

This short video shows one of our recent water heater installs here on Cape Cod. We replaced an old water heater and set up a new, efficient system that’s ready to go. Every job is a little different, but we always aim for clean work, safe setup, and reliable hot water.

We’re thankful for all our happy customers

  • ★★★★★

    We didn't have an emergency, but we wanted our very old furnace replaced. Bill got to me as quickly as he could, considering this very busy time of year. We had a follow-up issue the next day, and he came out promptly and fixed it. I will definitely do business with him again.


    – Gloria Lehan

  • ★★★★★

    We had a great experience with Dunphy Plumbing & Heating in South Dennis. Bill took care of our tankless water heater, handled some outdoor plumbing issues, and gave us clear advice on what to plan for down the line. It’s hard to find tradespeople this reliable on Cape Cod. We’ll definitely call him again for any future plumbing or heating needs.

    – C. Johannessen

  • ★★★★★

    Bill helped us when our gas furnace failed. He was able to come over and diagnosed the problem and gave us our options. We decided to go with a new furnace and matching a/c system. Bill placed the order and was able to have it installed in a week.
    Bill is an outstanding at his craft and ability to plan ahead for unexpected issues. We will use Bill if and when we need a five star plumber/gas fitter in the future. I would highly recommend Bill Dunphy Plumbing.

    - D. Muphy

  • ★★★★★

    I highly recommend Dunphy Plumbing. Bill Dunphy was responsive, knowledgeable, very customer-friendly, and his pricing was fair and reasonable. Bill installed two sinks for us and the project was seamless. We will definitely be using Bill for any plumbing needs going forward.

    – K. Jones

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Common questions from our Harwich customers

Close-up of under-sink drain and water line installation on Cape Cod

  • Yes! We're just down the road and work in Harwich all the time.

  • We provide 24/7 emergency plumbing. Call us anytime at (508) 243-1946.

  • Yes, we offer routine maintenance services for commercial clients to help prevent plumbing emergencies and ensure systems stay up to code. From water heaters to gas lines, we’ll keep everything running smoothly.

  • Absolutely. We’re fully licensed in Massachusetts (#31699) and always work to code.

Get in touch

Need a hand with plumbing or heating in Harwich, Cape Cod?

Call (508) 243-1946 or send a message below — we’ll get back to you soon.