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33 Years
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Emergency
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Trusted Heating and Plumbing Services in Watford
Established in 1993, Gas Mark 1 has built a reputation as a leading provider of domestic heating and plumbing services in Watford and the surrounding areas. As a family-run business operating from our large four-storey showroom in Watford, we prioritise quality installations, exceptional value, and professional customer service. Our team of Gas Safe registered engineers specialises in boiler and central heating installations, fireplace installations, bathroom and kitchen renovations, and comprehensive plumbing maintenance. With over two decades of experience, we have developed a skilled workforce through our in-house apprenticeship scheme, ensuring high-quality craftsmanship and reliable service. Our dedicated teams manage every project step, from initial consultation and design to supply and full installation, offering a seamless 'one-stop shop' experience.

We pride ourselves on our commitment to customer satisfaction, with over 50% of our new work coming from client recommendations. Our partnership with Herts Bathrooms and Kitchens allows us to provide an extensive range of products and services, ensuring tailored solutions for every client. All our engineers are fully qualified and trained in-house, reflecting our dedication to producing professionals you can trust in your home. We offer free, impartial advice through our knowledgeable showroom team and provide competitive pricing without compromising on quality. With a focus on innovation and customer-centric service, Gas Mark 1 continues to be a trusted name in home heating and plumbing solutions.
Services
Boiler Installation Central Heating Systems Fireplace Installation Bathroom Installations Kitchen Installations Plumbing Maintenance Landlord Gas Safety Certificates Power Flushes Underfloor Heating Solar Water Heating
Details
  • Year established: 1993
Highlights and features
  • We have over 20 years of experience in domestic heating and plumbing.
  • Our engineers are Gas Safe registered for your safety and compliance.
  • We train our engineers through an in-house apprenticeship scheme.
  • Over 50% of our new work comes from customer recommendations.
  • We offer free, impartial advice from our knowledgeable showroom team.
Associations and certifications
  • Gas Safe Register
What people say
Fantastic workmanship Professional and efficient Highly recommend Clean and tidy Excellent service
Services
Boiler Installation
We provide hassle-free boiler installations by experienced Gas Safe registered engineers. Our specialists ensure safe, efficient systems tailored to your home's needs. With competitive pricing and guarantees on workmanship, we deliver reliable heating solutions for long-term comfort.
Central Heating Systems
Specialists in central heating installations, including underfloor heating and solar hot water systems. Our engineers upgrade and install systems to improve efficiency and reduce energy costs. We offer free surveys and expert advice for optimal home comfort.
Bathroom Installations
Our dedicated teams create bespoke bathrooms to suit all tastes and budgets. From design consultation to final installation, we ensure minimal disruption and maximum quality. Partnering with Herts Bathrooms, we offer a complete 'one-stop shop' service.
Plumbing Maintenance
We handle emergency plumbing issues like leaks, blockages, and burst pipes across Hertfordshire. Our Gas Safe registered engineers provide rapid response and long-term solutions. Services include appliance repairs, tiling, and shower pump installations.
Fireplace Installation
We offer full fireplace design, supply, and installation services. Our specialists handle gas, electric, and stove options, ensuring safety and compliance. With showroom displays and expert advice, we help create the perfect focal point for your home.
Questions
What services does Gas Mark 1 offer?
We specialise in boiler installations, central heating systems, bathroom and kitchen renovations, fireplace fitting, plumbing maintenance, and landlord gas safety certificates.
Are your engineers Gas Safe registered?
Yes, all our heating engineers are Gas Safe registered to ensure safe, compliant installations and repairs.
Do you provide emergency plumbing services?
Yes, we offer emergency call-outs for plumbing leaks, burst pipes, and heating breakdowns across Hertfordshire and surrounding areas.
What areas do you cover?
We serve Watford, Hemel Hempstead, St Albans, Harrow, Edgware, Amersham, Luton, and other areas in Hertfordshire, Buckinghamshire, and North West London.