Evidence to gather first
Share photos, measurements, access notes, and any relevant survey or product information so gas engineer quotes are based on the same facts.
A stronger brief helps tradespeople price the same job rather than guessing from incomplete information.
Share photos, measurements, access notes, and any relevant survey or product information so gas engineer quotes are based on the same facts.
Ask whether preparation, materials, waste removal, making good, testing, and follow-on trades are included or priced separately.
Compare timing, insurance, review quality, warranty assumptions, and how clearly each gas engineer explains exclusions before choosing a shortlist.
£100–£400 for small repairs, £2,000–£4,500 for a new boiler, £4,000–£8,000 for a full heating system
Typical UK costs. Actual quotes depend on job scope, location, and materials. Post your job free on Job2Build to get personalised quotes.
Use the same scope, finish standard, and access assumptions in every conversation so quotes stay comparable instead of drifting into vague sales copy.
Ask for the exact appliance, output, controls, and warranty assumptions in writing.
Confirm whether flushing, inhibitor, condensate routing, and disposal of old equipment are included.
Make sure pipe alterations, boxing-in, and making good are broken out instead of buried in labour.
Request clear callout, aftercare, and commissioning terms before you compare boiler or heating quotes.
Describe your gas engineer project in a few minutes. Free for customers — always.
Verified gas engineer professionals in your area respond with competitive quotes and their reviews.
Compare profiles, read genuine reviews from verified customers, and choose the right pro for your job.
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Confirm Gas Safe registration for any gas work (boilers, hobs, fires)
Ask about warranty cover on both parts and labour
Check for experience with your boiler type or heating system
Look for verified customer reviews mentioning reliability and aftercare
Ensure they provide a Gas Safety Certificate after any gas work
All gas work must be carried out by a Gas Safe registered engineer. It is illegal for an unregistered person to work on gas appliances. Unvented hot water systems also require notification to building control.
Low-friction quotes are not enough on their own. Push these points into writing before you let a low price or early availability become the deciding factor.
No appliance specification, warranty detail, or commissioning plan in the written quote.
Quotes that hide flushing, disposal, or pipework changes inside a single labour figure.
A gas engineer who cannot confirm Gas Safe details for the named operative doing the work.
Promises of same-day installation without a site survey where complexity is obvious.
Modern boilers typically last 12–15 years. If your boiler is over 10 years old and efficiency has dropped below 85%, or you are facing frequent breakdowns, replacement is usually more cost-effective than ongoing repairs.
Gas Safe is the official UK register for gas engineers. Only Gas Safe registered engineers are legally allowed to work on gas appliances such as boilers, cookers, and fires. You can verify registration at GasSafeRegister.co.uk.
Combi boilers suit smaller homes with 1–2 bathrooms — no tank needed. System boilers suit larger homes with multiple bathrooms, using a hot water cylinder. Conventional boilers suit older properties with existing gravity-fed systems.
A powerflush typically costs £350–£600 depending on the number of radiators. It cleans sludge and debris from your central heating system, improving efficiency and extending the life of your boiler.
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