Services

Hertfordshire’s largest independent central heating installer

We have built up our reputation over the past 20 years by providing first class service and carrying out high quality installations and maintenance work.

We have developed our workforce through our in-house apprenticeship scheme. We believe training apprentices is one of the most important aspects of our business as our development program ensures we can produce high quality engineers and develop individuals you’ll be happy to have in your home.

As well as this, it has enabled us to build a team with a broad range of skills, meaning that we can carry out a large variety of services.

Modern fitted kitchen with oak cabinets, island unit, and built-in ovens

Installations

We have multiple dedicated installation teams who are able to provide you with your dream bathroom, kitchen or bedroom.

More >

Worcester accredited heating installer handing over documents to customer

Service Plans & Landlords

Our experienced Gas Safe registered engineers are available to ensure your appliances are safe and working effectively.

More >

Gas Safe engineer installing Worcester boiler with copper pipework

Heating Maintenance

Our services include full diagnostics & repairs on any boilers, central heating systems, fires, cookers as well as upgrades & power flushes.

More >

Chrome wall-mounted thermostatic shower mixer valve

Plumbing Services & Maintenance

These services include emergency plumbing leaks, blockages, burst pipes, fitting sinks, shower pumps, tiling, plastering and more.

More >

Wayne Harris

4 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

5 months ago

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

7 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

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

8 months ago

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.

Hertfordshire’s largest independent central heating installer

Installations

Service Plans & Landlords

Heating Maintenance

Plumbing Services & Maintenance

Google Reviews

Contact us