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A gas safety certificate is priced per visit and per appliance, and that is the whole of the arithmetic. What varies between quotes is how many appliances are assumed, whether a service is bundled in, whether the engineer has to travel, and whether the property is tenanted and needs an appointment the tenant will keep. None of those is hidden if you ask.

For context: 360 contractors hold an HSE asbestos licence covering England, Scotland and Wales.

How gas safety certificate cost works

  1. Say how many appliances there are. Boiler, fire, hob, oven, water heater. Most quotes cover one appliance and charge for each additional one, so a three appliance property quoted as one appliance will be re quoted on the doorstep.
  2. Check whether a service is included. A combined service and safety check is a different job from a check alone and costs more. Comparing a bundled quote against a bare check is the commonest reason a landlord thinks one firm is expensive.
  3. Ask about access and abortive visits. A tenanted property where nobody answers the door costs the engineer a visit. Most firms charge for an abortive call, and the fair ones tell you the figure in advance.
  4. Watch the region. London and the south east price above the national picture for the same reasons every trade does: rates, travel and parking. Compare quotes within your own area.
  5. Do not buy on price alone. The certificate is a legal record with your name on it. An engineer who is not on the Gas Safe register cannot lawfully issue one, and a cheap certificate from an unregistered person is worth less than nothing.

Paperwork and evidence

Sources

Common questions

Why do gas safety certificate prices vary so much?
Number of appliances, whether a service is included, travel, and whether the visit is tenanted. Give every firm the same three facts and the spread narrows sharply.
Is the certificate cost per property or per appliance?
Normally a visit charge covering one appliance, with each further appliance added. Ask for the per appliance figure.
Can I claim the cost against tax?
Landlords generally treat it as an allowable expense against rental income. It is a question for your accountant rather than for the engineer.

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The HSE-licensed asbestos contractors in Great Britain was 360 in the disclosable list as published on 8 September 2026, across 360 licence holders recorded in HSE.

Cite as: "Asbestos Survey Cost Asbestos Licence Register Index", updated 2026-09-09, https://asbestossurveycost.co.uk/gas-safety/gas-safety-certificate-cost/.

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HSE-licensed asbestos contractors · Great Britain · the disclosable list as published on 8 September 2026

360

licence holders360

Source: Asbestos Survey Cost Asbestos Licence Register Index

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