Step 1
Arrange a Site Survey
The first step is to contact our office to schedule a site visit with one of our experienced surveyors. During the visit, we’ll:
- Discuss your ideas and requirements
- Take precise measurements
- Provide professional recommendations
After the visit, our team will prepare a detailed quotation tailored to your project.


Step 2
Quotation & Prioritisation
For central heating installations, we understand that time is critical—especially during colder months. That’s why we prioritise urgent heating work and aim to offer the earliest possible installation date.
If you’re planning a kitchen or bathroom project, we will connect you with our trusted partners at Herts Bathrooms and Kitchens. They will arrange a showroom visit to walk you through a range of design options and product displays.
Step 3
Confirm Your Quotation & Pay Your Deposit
Once you are happy with your quotation and have chosen your fixtures and fittings, we will:
- Request a deposit to secure your booking
- Schedule your project start date
- Assign one of our specialist engineers and relevant contractors
This ensures your project is allocated sufficient time and the right expertise from the very beginning.


Step 4
Second Site Survey (Technical Survey)
Before work begins, we conduct a second technical survey. This visit allows us to:
- Double-check all measurements and plans
- Confirm that all selected items will fit correctly
- Address any technical concerns ahead of installation
This attention to detail helps avoid delays and ensures a smooth installation process.
Step 5
Project Scheduling & Communication
The week before work begins, we’ll send you an estimated schedule of works, outlining:
- Who will be onsite each day
- Key milestones for each phase of the project where relevant
During the installation, we’ll provide weekly progress updates, so you’re never left in the dark. Our engineers manage the project onsite, coordinating directly with:
- Contractors
- The Herts Bathrooms and Kitchens team
- Gavin, our Installation Manager


Step 6
Project Completion & Feedback
Upon completion of your project, we will:
- Conduct a final quality check
- Ensure all work has been completed to your satisfaction
- Invite you to provide feedback via phone, email, or a Google review
Most of our work comes through referrals and word-of-mouth, and we greatly appreciate your support in sharing your experience.
Why Choose GasMark1?
With over 30 years of experience, a trusted team of Gas Safe registered engineers, and a customer-first approach, GasMark1 ensures your heating, kitchen, or bathroom project is:
- Professionally managed
- Delivered on time
- Completed to the highest standards












