Website design for heating engineers and boiler installers

A heating engineer’s website should turn three kinds of visitor into booked work: the homeowner pricing up a new boiler, the family with no hot water on a January morning, and the landlord who needs a gas safety certificate before the tenancy renews. Each needs its own route to your phone or diary. Unavoidable Marketing is a Leeds-based agency that designs and builds websites for UK heating engineers, on WordPress you own, with founder Andrew Heppinstall on every strategy call.

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Last updated: 18 October 2026

Start with your Gas Safe number, not your logo

Gas Safe registration is a legal requirement for gas work, and customers increasingly know to check it. Put your Gas Safe registration number in the header or right beside the main call button, written as text so it can be read and copied. Do the same on every boiler page. It answers the first question a careful customer has, and it separates you from the lead-generation sites that sell enquiries on to whoever pays.

Next to it, show the manufacturer accreditations you actually hold. If you are an accredited installer for Worcester Bosch, Vaillant, Viessmann, Ideal or another brand, say so, and explain what it means for the customer in one line, such as a longer manufacturer warranty when you fit that brand. If you install heat pumps under MCS, show that too. These are trust signals, not legal requirements, and we only display the ones you have.

Three journeys, three sets of pages

1. The boiler installation quote

This is where most of the money is, and it is a considered purchase. People compare three or four installers, often over a week or two. Your site has to make the quote step feel easy and safe. We build separate pages for the main job types, because the customer and the questions differ:

The quote form should ask the questions you would ask on the phone: current boiler type and roughly how old, number of bathrooms, whether there is a hot water cylinder, postcode, and when they would like the work done. A photo of the existing boiler and its pipework saves you a call back.

Finance messaging belongs here only if you genuinely offer finance through a regulated provider. If you do, say so plainly near the quote button. If you do not, leave it out. A vague “finance available” line that leads nowhere loses trust.

2. The breakdown and the winter emergency

When the boiler dies in a cold snap, nobody fills in a five-field form. They want a number and some sign you can come today or tomorrow. Your breakdown page should be short and built for a phone:

• A large tap-to-call button that stays on screen as they scroll
• The areas you cover, written as town names people recognise
• The common faults you fix: no heating, no hot water, low pressure, error codes, leaking boilers
• The brands you repair, since people often search “Vaillant boiler repair” or “Baxi engineer near me”
• Honest hours: if you do not take calls at 10pm, do not say you do

Between November and February, we often move the emergency call button higher up the homepage and add a short winter banner. In summer it can step back and let installations lead.

3. Servicing and landlord certificates

Servicing is the steady work that keeps the diary full in quiet months and brings customers back for the boiler swap later. Landlord gas safety certificates are a separate audience: letting agents and landlords with several properties, who care about reminders, paperwork and turning up when the tenant is in.

Give each its own page. On the servicing page, cover what a service includes and why manufacturers ask for one each year to keep the warranty valid. On the landlord page, cover how you book access with tenants, how the certificate is sent, and whether you handle multiple properties. A simple booking form asking for the number of properties and the renewal date is often enough.

What good looks like on a phone

Most heating searches happen on mobile, and a lot of them happen in a cold house. The site has to load quickly on 4G, with the phone number visible without scrolling. We keep pages light, compress photos of your installs, and avoid sliders and pop-ups that push the call button down. Your best install photos, a tidy combi with neat copper and a magnetic filter, go on the installation pages where they help people choose you.

Reviews, local pages and Google Business Profile

Customers buying a boiler read reviews closely. Show recent reviews from Google on the installation pages, and ask happy customers to mention the job and the town in their review. Build a page for each main area you cover with real installs from that area, not copies with the town swapped.

Keep your business name, address and phone number the same on your site, your Google Business Profile and directories. That consistency helps Google, and it helps AI assistants like ChatGPT and Gemini, which build answers from sources they can read and trust. Nobody can guarantee being named, but clear answer-first pages make it more likely. If you run Google Local Services Ads, your site should match what the ad says.

Proof from a heating business we work with

Mr Reactive, a Leeds boiler installer, made over £22,000 of revenue in the first month from £1,200 of ad spend. That result came from ad spend, not from a website on its own, but it shows what happens when people searching for a boiler land on a business that is ready to take the call. Read the Mr Reactive case study.

How we do it