Service Plans & Landlords

For more than 20 years Gas Mark 1 have built a reputation as one of the leading independent providers of heating and plumbing services in Watford, Hertfordshire and the surrounding areas.

Service Plans & LandlordsDan Maxwell WHIC2025-09-10T14:37:35+01:00

Our experienced Gas Safe Registered maintenance and breakdown teams are on-hand to make sure your gas appliances are working efficiently and safely. Our highly skilled technicians can attend to and service any boiler, warm air unit, circulator, wall heater, water heater, gas fire, cooker and more so whatever appliance you have we ensure you that you are in safe hands with us.

Having a gas appliance serviced and well maintained not only improves efficiency but can also save you money.

Services we provide

Boiler Servicing
Other gas appliance servicing (Gas Fire / Warm Air Unit etc.)
Landlord’s (CP12) Gas Safety Certificate
Appliance Safety Reports for buying/selling property

Maintenance and Service Contracts
Central Heating and Appliance breakdowns and repairs
PAT Testing

Engineer servicing a wall-mounted boiler in a modern kitchen

Come and explore our Watford showroom

Step inside and discover over 60 beautifully designed bathroom and kitchen displays, with styles to suit every taste and budget. Our friendly team is here to help you find the perfect inspiration for your home – we’d love to welcome you.

15-21 Market Street, Watford, Herts, WD18 0PA

What3Words ///escape.those.over

Get in contact

Opening hours

Gas Mark 1
Mon – Fri: 9am – 5:00pm

Herts Bathroom Centre
Mon – Fri: 9am – 5:00pm
Saturday – by appointment

Google Reviews

Wayne Harris

6 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

6 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

6 months ago

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

Kevin Petty

9 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

9 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

9 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

9 months ago

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

10 months ago

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.

See more of our google reviews

Contact us

01923 231780
office@gasmark1.com
15-21 Market Street, Watford, Herts, WD18 0PA