Heating engineer: boilers, servicing and repairs

Service, repair and fit boilers and heating systems for local homes and landlords, working from your van.

Engineer fitting an air conditioning and ventilation unit on a commercial building wall.
Startup cost£3k to £12k
Monthly revenue£2k to £8k
Time needed20+ h/week
First incomeMonths

Estimates for a small start in the UK, not guarantees.

What it is

A qualified engineer who installs, services and repairs central heating, boilers, radiators and controls in people's homes. Many also add unvented hot water or heat pump work as they build experience.

Your first three steps

  1. Check which qualifications you need for the work you want to do (gas, oil, heat pumps) and book training or an assessment
  2. Price up a van, tools and insurance, and set your call-out, hourly and service rates by checking local competitors
  3. Tell local landlords and letting agents you are taking on work, and set up a Google Business Profile for your area
Who pays

Homeowners, landlords, letting agents and small local builders who need a reliable engineer.

How it makes money

Fixed prices for annual services and landlord safety checks, call-out and hourly rates for repairs, and quoted prices for boiler or system installs.

Skills that help
  • Recognised heating or gas qualifications
  • Fault finding and practical problem solving
  • Clear communication with customers
  • Organised quoting and booking
Watch out for
  • Gas work must be done by someone on the Gas Safe Register, check the current requirements for your part of the UK
  • Oil boilers usually need OFTEC or similar registration, and heat pump grants usually need MCS certification, so check what applies
  • Public liability insurance, and check whether your tools and van are covered
  • Building regulations sign-off, usually through a competent person scheme, for many installs
  • Training and registration take time and money before you can earn, and annual registration fees continue
  • Emergency call-outs in winter can mean long, unpredictable hours

🔒 Full research report for UK

Real cost breakdown with current prices, licences and registration checklist, local competition, pricing, break-even and a 30-day launch plan, with sources.

Coming soon

Questions people ask

How much does it cost to start as a self-employed heating engineer?

Startup costs are typically around £3,000 to £12,000, depending on your tools, van and insurance. Training and registration take time and money before you can earn, and annual registration fees continue.

How much can a heating engineer earn working for themselves?

Monthly revenue is typically around £2,000 to £8,000, depending on the mix of servicing, repairs and installs and how many hours you work. These are estimates, and winter call-outs can mean long, unpredictable hours.

What registrations should I check before working as a heating engineer?

Check that gas work must be done by someone on the Gas Safe Register for your part of the UK. Also check OFTEC or MCS requirements, public liability insurance, and building regulations sign-off through a competent person scheme.

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Photo: hpgruesen on Pixabay

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