The short answer
You don't legally have to use a HETAS-registered installer, but fitting a wood burner is notifiable work under Building Regulations (Approved Document J covers combustion appliances and flues). A HETAS-registered installer is a competent person who can self-certify the job and notify building control for you — so you avoid paying your local authority for a separate inspection. They issue a HETAS Certificate of Compliance, which you need for your records, your home insurance, and when you sell the house. Using a non-registered fitter means you must arrange and pay for building-control sign-off yourself.
This is the page that saves people money and stress later. A stove that isn't signed off can hold up a house sale and may not be covered by insurance. Here's what HETAS registration actually does for you.
The compliance picture
- Governing ruleBuilding Regs, Approved Document J
- Notifiable work?Yes — must be signed off
- HETAS installercan self-certify
- CertificateHETAS Certificate of Compliance
- Alternativepay building control directly
What HETAS registration actually means
HETAS operates the government-recognised competent person scheme for solid fuel and biomass heating. A registered installer has been assessed as competent to fit stoves and flues to the required standard. Because they sit on that scheme, they can self-certify the installation against Building Regulations and notify your local authority on your behalf — the same route a registered electrician uses for electrical work. Without that, the work still has to comply with the regulations; you just have to involve building control directly and pay for it.
Approved Document J in plain English
- Hearth: non-combustible, with minimum dimensions set by the regulations and the stove's clearances.
- Flue: correctly sized, swept and tested, with the right liner for the appliance.
- Air supply: adequate ventilation for combustion, often a dedicated air vent for higher-output stoves.
- Carbon monoxide alarm: required in the room with the appliance.
An installer registered with a competent person scheme checks all of this and signs it off; a homeowner doing it themselves must notify building control before starting.
Frequently asked questions
Is it a legal requirement to use a HETAS installer?
No. You can use any installer, or do the work yourself, but a wood burner is notifiable under Building Regulations. A HETAS-registered installer can self-certify and notify building control for you; otherwise you must arrange building-control sign-off directly.
What is a HETAS Certificate of Compliance?
It's the document a registered installer issues confirming the stove and flue were fitted to Building Regulations. You keep it for your records, insurance and any future house sale.
What happens if my stove wasn't signed off?
An unregistered installation can be checked and certified retrospectively by building control, sometimes for a fee, but it can hold up a house sale and may affect insurance until it's resolved.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific home. They are guidance, not a quotation or guaranteed saving.