Gas Safety
How Much Does a Gas Safety Certificate Cost?
Published 1 September 2026 by WDI Group (Surrey) Ltd
If you let a property with any gas appliance in it, you need a gas safety certificate every twelve months. It is a legal duty under the Gas Safety (Installation and Use) Regulations 1998, not a recommendation, and the record has to be given to your tenants and kept for two years.
Prices across the UK generally run from around £60 to £150 for a standard one or two appliance property. Our published rate is £99 excluding VAT during normal hours in Cheam, Sutton and the surrounding areas, covering up to two appliances, with £40 for each appliance beyond that.
This guide covers what changes the price, what the certificate actually covers, and where landlords most often get caught out.
What a gas safety certificate costs
Our rate is £99 for a gas safety certificate during working hours, 7:30am to 5pm. An evening slot between 5pm and 7pm is £120, and Sundays or bank holidays are £220. Those figures exclude VAT and include up to two gas appliances.
If you also want the boiler serviced, the combined gas safety check and boiler service is £160 during working hours, which is considerably cheaper than paying for the two visits separately and means only one appointment to arrange with your tenants.
What changes the price
- Number of gas appliances — the certificate covers each one, and beyond two we charge £40 per additional appliance
- Property type — a house with a boiler, gas hob and gas fire takes noticeably longer than a flat with a combi only
- Time of the appointment — evenings, Sundays and bank holidays are charged at the published rate for that band
- Access — if a tenant is not in and the visit has to be repeated, that is a second visit
- Whether you combine it with a boiler service, which is cheaper as a package
What the engineer checks
- That each appliance is burning correctly and gas pressure and flow are within tolerance
- That flues and chimneys are clearing products of combustion safely
- That ventilation to each appliance is adequate and unobstructed
- That all safety devices operate as they should
- That pipework and fittings are sound, with a tightness test on the installation
Landlord duties in plain terms
The check must be carried out every twelve months by a Gas Safe registered engineer. You must give a copy of the record to existing tenants within 28 days of the check, and to any new tenant before they move in. You must keep copies for two years.
You can have the check done up to two months before the current certificate expires without losing the original anniversary date, which is the sensible way to avoid a lapse if a tenant is difficult to arrange access with. Failure to hold a valid certificate carries real penalties, and it can also affect an insurance claim if something goes wrong.
What happens if something fails
If an appliance is found to be unsafe, the engineer will classify the defect and, with your permission, may need to disconnect or cap it. That is not the engineer being awkward: an appliance classified as Immediately Dangerous is one that presents a real risk to whoever is living there.
You will be told exactly what was found and what is needed to put it right. Remedial work is charged separately at the standard hourly rate plus any parts, and once the fault is corrected the certificate can be issued.
Homeowners: do you need one?
There is no legal requirement for an owner-occupier to hold a gas safety certificate. Many people still choose to have one, particularly before selling a property, when arranging insurance, or simply for the reassurance of a documented check on an older installation.
If you own and live in the property, an annual boiler service at £99 is usually the more useful purchase, since it covers the efficiency and maintenance side as well as safety.
Need help with this in your own home?
Cheam Plumbing is part of WDI Group (Surrey) Ltd. Call 020 3727 2578 and we will advise on availability and the quickest response we can provide, or view our published rates before booking.