Your Go-to Gas Safety Engineer & Plumber in Welwyn | Cavendish Plumbing, Heating & Gas

Welcome to the website of Cavendish Plumbing, Heating & Gas. If you’re searching for a distinguished plumber, tiler or Gas Safety engineer, based in Welwyn Garden City and covering nearby areas including Hatfield and Wheathampstead, you’ve come to the right place. Having proudly served the local community for over two decades, we’ve become known for the speed, efficiency and professionalism of our services, from general drainage and heating works, to bathroom fitting. As you’ll see from our website, we’re remarkably versatile, and the ideal choice for anything from the fitting and servicing of boilers, to a strategic power flush to restore a sluggish system.

Our philosophy is that you shouldn’t have to pay inflated prices for quality work from an accredited plumber or Gas Safety engineer; and that’s why our prices remain so competitive. As Baxi, Ideal and Worcester accredited installers, we’re able to offer our clients around Welwyn Garden City, Hatfield and Wheathampstead extended warranties, providing real peace of mind. So whether you need boilers installed, serviced or repaired, or are looking to make use of our expertise in all things plumbing – get in contact with us to discuss your requirements at your earliest convenience. Homeowners, landlords and agents – our clients come to us with all sorts of situations, and receive effective trouble-shooting and problem solving, each and every time.

Our Services

Browse our website to learn more about the different services listed below, from bathroom fitting to a power flush. As a plumber and Gas Safety engineer, we feel it’s vital to be just a phone call away, whatever the time might be. After all, issues with boilers and drainage can often pose significant issues around safety and well-being, and can’t always wait till the next morning…

Our response times in and around Welwyn Garden City, Hatfield and Wheathampstead are lightning fast, so be sure to save our number in your phonebook, as you never know when a minor disaster might strike. Take a look at our testimonials to see just how happy our clients are with the standard of service we provide. We specialise in:

Plumbing & Drainage

Let us establish an effective, cohesive plumbing system to keep your property functioning seamlessly.

Heating & Gas

A comprehensive range of services to keep properties around Welwyn Garden City, Hatfield and Wheathampstead warm and comfortable all year-round.


When your drainage slows down, clogs up or springs a leak, call in a Cavendish plumber for fast, effective intervention.

And that’s not to mention the work we complete as the Welwyn Garden City, Hatfield and Wheat Hampstead areas’ favoured tiler and bathroom fitting specialist. So if you’re looking to overhaul a tired, uninspiring or problematic bathroom, we’d love to hear from you.

Contact Us

From service and repair, to installation and replacement, from private customer to landlord and agent – If gas and water run through it – we do it!.


You can reach Cavendish Plumbing, Heating & Gas, trusted plumber and Gas Safety engineer for Welwyn Garden City, Hatfield and Wheathampstead, on 0795 729 5257.

  • 25 Crossway, Welwyn Garden City