Gas safety certificate when selling a house
There is no general legal requirement to hold a gas safety certificate when you sell a home, but buyers, solicitors and lenders sometimes ask for evidence.

What the law requires
Selling a home does not by itself trigger a legal requirement for a gas safety certificate. The annual record is a landlord duty. If the property is currently let, the landlord’s gas safety duties continue until the sale completes.
Why it can still help a sale
- It shows the gas appliances were checked by a Gas Safe registered engineer
- It can answer questions from a buyer’s solicitor or surveyor
- A boiler service record shows the boiler has been maintained
- It lets you deal with defects before they appear in a survey
A check is a snapshot of the day it was done. Buyers will usually still arrange their own survey.
What to prepare
- A list of gas appliances: boiler, hob, cooker, any others
- Boiler make, model and age, and any service history
- Installation paperwork and warranty, if you have it
- Access arrangements if the property is empty or tenanted
Options and cost
A gas safety check: £92.50 for up to two appliances, plus £22.50 for each additional appliance. Gas fires are charged separately.
A boiler service from £92.50 gives you a service record as well. Neither includes repairs or parts.
Gas safety certificates · Homebuyer plumbing and heating assessment
Common questions
Should I have a boiler service before selling?
It is not required, but a recent service record is useful evidence the boiler has been looked after.
What if the check finds a defect?
The engineer explains the safety action needed. Repairs are priced separately, and you decide whether to carry them out before the sale.