Gas Mark 1 | Heating, Bathrooms, Kitchens & Home Improvements in Watford

Heating

Since 1993, Gas Mark 1 has been the leading independent installer of boilers and central heating in Watford and beyond, trusted for quality service and excellent value.

Bathrooms

For over 25 years, we’ve built a reputation as one of Hertfordshire’s leading kitchen and bathroom installers, with a Watford showroom showcasing 60+ stunning bathroom suites.

Kitchens

We work with three leading kitchen manufacturers, showcasing over 140 door styles. This allows us to offer a wide range of kitchens to suit every taste, style, and budget.

Fires

We work with several leading fireplace manufacturers, offering a wide range of styles and finishes. This means we can supply and fit fireplaces to suit all homes, tastes, and budgets.

Bedrooms

We work with leading bedroom furniture manufacturers, offering a wide choice of styles and finishes. This allows us to design and fit bedrooms to suit every space, taste, and budget.

Reliable Installations & Expert Service

Looking for hassle-free installations and dependable service? Gas Mark 1 offers top-notch solutions for your home, whether you require a new boiler, central heating system, fireplace, bathroom, kitchen, bedroom or plumbing maintenance work. Our expert team of heating and plumbing engineers is here to assist with all your needs.

As your local one-stop shop for home interiors, Gas Mark 1 delivers exceptional installations and superior customer service. Operating from our Watford showroom, we have proudly served the area for over 20 years, providing high-quality, cost-effective solutions tailored to your requirements.

Meet the team

Recent Case Studies

See how we’ve transformed homes across Hertfordshire with expertly designed kitchens, bathrooms, fireplaces, and bedrooms—each tailored to our customers’ style, needs, and budget.

Outdoor Bath: Transforming a Hertfordshire Garden into a Luxury Outdoor Bathing Retreat
Bath installation, Bespoke installation, Carpentry, Plumbing
Gas Mark 1 Herts Bathrooms & Kitchens specialise in bespoke plumbing installations that help Hertfordshire homeowners create unique living spaces. This recent outdoor bath installation transformed a secluded section of our customer's garden into a luxurious outdoor bathing retreat. Combining practical plumbing expertise with thoughtful design and craftsmanship.
full details

Bringing a modern, practical kitchen to life with expert hands for a family in Buckinghamshire
Carpentry, Electrical Appliance Fitting, Kitchen installation, Plastering, Worktop Fitting
Although we are Watford based, with a showroom in the town centre, we work across a large area and completed this full kitchen installation in Buckinghamshire, delivering our usual high-quality, professionally managed project from initial survey through to final completion. The customers were recommended us by their family who we have been working for for many years.
full details

More Recent Work

Wayne Harris

3 months ago

We’ve recently had three bathrooms fully refurbished along with a complete new heating system and boiler relocation, and our experience from start to finish has been fully deserving of five stars.

The whole team have been very professional throughout. From our first visit to the showroom and throughout consultations, site surveys and delivery of the project, the communication has been clear and consistent, and nothing ever felt like too much trouble — the team have a genuine “can do” attitude and creative approach that is focused on delivering great service and a fantastic end result.

The project has felt like a partnership rather than a blunt client/contractor relationship and they have worked with us from the start to explain options, offer suggestions and work with us to get the details right.
Just as importantly, they were reliable and respectful of our home — turning up when they said they would, keeping things tidy, and keeping the schedule on track.

Stew was extremely helpful during the consultation and design process and Jason was incredibly meticulous with the central heating works.
Special mention goes to Tom H. for his attention to detail and for working tirelessly to ensure that we were satisfied.

We’ll definitely be using Gas Mark 1 / Herts Bathrooms again for future work and wouldn’t hesitate to recommend them.

Martin Geoffrey Moore

A nice experience. We recently refurbished our bathroom and these guys were great. We were very impressed by their total attention to detail, their focus on the job and the way they made every effort not to leave any debris or waste behind them. Thank you!

Jo Windmill

Tom and Harry, really professional - great job! Would recommend. Thank you 🙏

Kevin Petty

5 months ago

Thanks to Charlie, Tom and all the team for a fantastic job. We are delighted with our new bathroom. From start to finish great care and organisation has been taken to keep disruption to a minimum.
We have no hesitation in recommending Gas Mark 1

James

6 months ago

Very happy customers! Gas Mark 1 and Herts Bathrooms were excellent every step of the way. Communication was fantastic throughout and the work was undertaken to our complete satisfaction. Gareth (engineer) and his team were polite, considerate and very easy to get on with. Highly recommended

Libby Pfeiffer

We are delighted with our new kitchen. It is lovely and most importantly, it was put in so well by GasMark1.
Alex and co were totally professional, polite (and nice).
Special mention and thanks for Alex, a Perfectionist!

Natasha Proctor

Would absolutely recommend Gas Mark 1 - we got our boiler replaced, a new radiator installed and an electric shower put in the bathroom and the team were brilliant. Always arrived on time each day, were very knowledgeable and great at explaining what was happening and left the house without any mess. We'll be getting them back in for work on the kitchen next!

Coral

We had Gas Mark 1 round to install our washing machine. Barney visited this morning to survey the job and managed to get two guys to install a couple of hours later. Great service as usual. They installed our kitchen 7 years ago and were reliable then. Great to see their customer service is still the same as are the three guys that came today, so not a high staff turnover.
Wouldn't hesitate in recommending this company.

Heating

Bathrooms

Kitchens

Fires

Bedrooms

Reliable Installations & Expert Service

Recent Case Studies

Outdoor Bath: Transforming a Hertfordshire Garden into a Luxury Outdoor Bathing Retreat

Bringing a modern, practical kitchen to life with expert hands for a family in Buckinghamshire

More Recent Work

Google Reviews

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