The short answer
Routine chimney repair — repointing, replacing weathered bricks, fitting a pot, renewing flashing or a cowl — is generally treated as repair and maintenance and is not notifiable building work. Work becomes notifiable when it is controlled work under the Building Regulations, principally anything covered by Approved Document J: relining a flue, installing or replacing a solid-fuel or gas appliance, building or altering a hearth or fireplace recess, or constructing a new flue. That work must be notified to building control, or carried out and self-certified by a registered installer through a competent person scheme such as HETAS for solid fuel or Gas Safe for gas, who notifies it for you.
Notifiable means the work has to be made known to building control, directly or through a registered scheme. Here is where chimney work sits.
Notifiable or not
- Repointing / new bricksnot notifiable
- New pot / cowl / flashingnot notifiable
- Relining the fluenotifiable
- New / swapped appliancenotifiable
- Notify viaHETAS, Gas Safe or building control
What notifiable means
Under the Building Regulations, certain works are controlled and must be notified so that compliance can be checked. Notification can be done by submitting a building regulations application to your local authority building control before work starts, or — for the categories covered by competent person schemes — by using a registered installer who carries out the work and then self-certifies and notifies it on your behalf. Pure repair and maintenance that returns the chimney to its previous state is not building work in the controlled sense, so there is nothing to notify. The trigger is whether the work creates, extends or materially alters a controlled service or fitting such as a flue, hearth or appliance.
Repairs that are not notifiable
The everyday jobs that keep a chimney weathertight and safe are not notifiable because they are maintenance. These include repointing the brickwork, replacing spalled or frost-damaged bricks like-for-like, fitting a new chimney pot where the existing one has cracked, renewing lead flashing at the roof junction, fitting a cowl or bird guard, and rendering or recapping the stack. None of these change how the flue or appliance works; they restore the existing arrangement.
| Job | Notifiable? | Why |
|---|---|---|
| Repointing the stack | No | Maintenance — like-for-like |
| Replacing a cracked pot | No | Maintenance — like-for-like |
| Renewing flashing | No | Maintenance — weathering |
| Relining the flue | Yes | Controlled under Doc J |
| Fitting a wood-burning stove | Yes | Appliance + hearth + flue |
Indicative; confirm with building control if in doubt. Sources: gov.uk Approved Document J; HETAS.
Work that is notifiable
Once the job affects the flue or appliance, it becomes notifiable. Relining a chimney, installing or swapping a stove, open fire or gas fire, opening up a blocked fireplace for use, or building a new hearth all fall under Approved Document J and must be notified. The simplest route is to use a registered installer: for solid fuel and biomass that is a HETAS-registered installer, and for gas it must be a Gas Safe-registered engineer. They notify the work and issue a certificate. If the installer is not registered, you must make a building regulations application to building control yourself before the work starts.
Frequently asked questions
Is sweeping or minor repointing notifiable?
No. Sweeping is maintenance, and repointing restores the brickwork to its previous condition. Neither is controlled building work, so there is nothing to notify.
Do I have to notify building control if I fit a stove myself?
Yes. Fitting a solid-fuel stove is notifiable. If you are not a registered installer you must submit a building regulations application to building control before starting, so the installation can be inspected.
Can a registered installer notify on my behalf?
Yes. A HETAS-registered installer for solid fuel, or a Gas Safe engineer for gas, can self-certify and notify the work for you, then issue a certificate, avoiding a separate building control application.
Sources & further reading
- gov.uk — Approved Document J (combustion appliances and fuel storage systems)
- HETAS — registered installers and certification
Figures on this page are typical UK ranges drawn from published sources and depend on your specific chimney. They are guidance, not a quotation.