Your experienced and trusted local plumber.

Plumbers in GTA & Durham Region – Commercial & Residential Plumbing

Caldwell Plumbing is proud to provide expert plumbing services in Oshawa, Ajax, Whitby and more surrounding areas of Durham Region. We specialize in all residential and commercial plumbing, as well as drain cleaning services. Our plumbers in Oshawa are available at any hour of the day with our 24h dispatch system. With great service comes great customer satisfaction, and that’s our number one goal! Caldwell Plumbing aims to provide exceptional service and a job done right the first time. 

We offer the following plumbing services in Oshawa, Durham Region & GTA:

    24/7 Emergency Service 

    Backflow preventer testing & installation 

    Drain blockages, backups & drain snaking 

    Kitchen & bathroom renovations 

    Plumbing repairs & replacements 

    Leak detection & repairs 

    High pressure drain cleaning 

    Valve replacement & service 

    And more!

Caldwell Plumbing is a family owned and operated company, as local as it gets! We know the area well – we’ve been providing local plumbing services since 1979! Our team has been the trusted go-to for both residential plumbing and commercial plumbing services in Oshawa, Durham Region. We specialize in all aspects of plumbing and other drain servicesno job is too complex for our experts. We truly care about your home and business, that’s why we’re here with a solution whenever you call. Discover why so communities rely on Caldwell Plumbing. 

Family Owned

& Operated Plumbers In Oshawa

Caldwell Plumbing is a fully licensed and insured, family owned and operated company. That’s something we take a lot of pride in, and our customers feel the same. We’ve been serving the Oshawa & Durham Region, GTA and surrounding communities for over 30 years, and it shows in the level of experience and quality of work we bring to every project. Over the last three decades, we’ve seen it all, and fixed it all for families and businesses in our community. We wear our experience and reputation as local plumbers as a badge of honour.

Learn more about us

24 Hour
Emergency Plumbing Service

For residential and commercial customers, a plumbing emergency can be a devastating experience. Our 24/7365 local emergency plumbing services are just a phone call away, fixing even the most stressful of situations. With 7 trucks on the road and 12 employees we are available 24 hours a day, 7 days a week, and every day of the year to handle all of your plumbing emergencies. We are trusted across the Durham Region and the GTA as the “go-to” emergency plumber in Oshawa for plumbing services.

Read about our emergency plumbing services

Free Estimates

We offer free estimates on our work for commercial plumbing and residential plumbing. Get in touch with us, and one of our local plumbing experts will assess the project and give you an estimate for the completion of the work. There’s no project too big or small - talk to us for a free estimate on your next project.

Get your free estimate

Request A Callback

We are here to take your call. Enter your phone number and one of our local representatives will call you back within the same day.

    Plumbing Services We Offer

    Our plumbers in Oshawa, Durham Region & the GTA take pride in creating a positive experience, and a successful outcome for every project the first time. Be it an emergency situation or a barely noticeable leak, Caldwell Plumbing treats all jobs with the same level of professionalism and expertise. Explore our services menu below to see just some of our many plumbing services in Oshawa, Durham & the GTA: 

    Customer Reviews

    See what some of our customers have to say about our plumbing services.





    Camille - Toronto

    We had a major leak in the basement due to a drain issue in the kitchen. An appointment was set very rapidly. Ryan found out very quickly what the issue was about. He work fast, was very nice. Very professional. Finally a good plumber!!! I would definitely recommend them. Thanks a lot.

    Areas We Service

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