Stove installation regulations in England

A wood burning or multi-fuel stove is a lovely addition to a home, but it is also a fire inside your living room and a source of carbon monoxide if anything goes wrong. That is why installing one in England is controlled by Building Regulations. This guide explains the main rules in plain terms so you know what a proper installation should include.

In short

• Stove installation is notifiable building work under the Building Regulations.
• The technical guidance is Approved Document J (Part J), which covers hearths, flues, chimneys, ventilation and carbon monoxide alarms.
• Either a competent person scheme installer self-certifies the work, or Building Control must be notified before work starts.
• A carbon monoxide alarm is required when a new or replacement fixed solid fuel appliance is installed.
• Smoke control areas, listed building status and planning rules may also affect what you can fit.

Approved Document J

Part J of the Building Regulations deals with combustion appliances and fuel storage. The government's Approved Document J sets out ways of meeting it, including how appliances get enough air to burn safely, how smoke and gases are taken out of the building, and how the building is protected from heat and fire. The current edition incorporates amendments that came into force on 1 October 2022, mainly extending the rules on carbon monoxide alarms.

The stove manufacturer's installation instructions sit alongside the regulations. Where the manufacturer asks for more, such as a bigger hearth or greater clearance, their figures should be followed.

Who signs off the work?

There are two legitimate routes.

Competent person scheme

Installers registered with a government-authorised competent person scheme, such as HETAS, can self-certify work within the scope of their registration. The scheme notifies your local authority on the installer's behalf and you receive a certificate of compliance. Keep this safe, as you will need it when you sell your home and your insurer may ask for it.

Building Control

If the installer is not registered with a scheme, Building Control must be notified before work starts. A Building Control officer will inspect the work and, if satisfied, issue a completion certificate. There is a fee for this route.

An installation with no certificate from either route can cause problems with insurance and conveyancing, and may not be safe.

Hearths

A stove must stand on a hearth made of non-combustible material that protects the floor and marks out a safe zone around the fire. In outline, Approved Document J expects:

• a constructional hearth, usually at least 125mm thick, unless the stove is certified to stand on a thinner 12mm hearth because it will not heat the hearth above 100°C,
• a freestanding hearth of at least 840mm by 840mm where the stove is not in a fireplace recess,
• a surface that extends at least 150mm either side of the stove and at least 225mm in front of it, or 300mm for appliances that can be used with the door open.

These are summary figures. Your installer will check the details for your stove and room, and our fireplace and hearth preparation page explains what that work involves.

Flues and clearances

The flue must carry smoke safely out of the house and draw properly. Key points include:

• a general minimum total flue height of 4.5m for solid fuel appliances,
• an outlet position that clears the roof, nearby windows and structures as set out in the guidance,
• a limit on the number and angle of bends,
• safe distances between the flue and combustible materials such as joists and roof timbers, as set by Part J and the flue manufacturer,
• a liner or chimney system suitable for solid fuel.

Existing chimneys are often lined to make them safe and efficient. Where there is no chimney, an insulated twin wall flue can be used. A notice plate recording the flue and appliance details should be fixed somewhere visible, such as next to the chimney or the electricity meter.

Ventilation

A stove needs air to burn. Under Approved Document J, a stove without a draught stabiliser generally needs a permanent air vent of 550mm² for every kilowatt of rated output above 5kW. In more airtight homes, typically newer properties with an air permeability of 5.0 m³/(h.m²) or less, the vent is needed for the full rated output. Extractor fans in the same room can also cause problems. Some stoves can take their air directly from outside, and the manufacturer's instructions will say what is needed.

Carbon monoxide alarm

Since 1 October 2022, Approved Document J says a carbon monoxide alarm should be fitted in the same room whenever a new or replacement fixed combustion appliance is installed in a home, excluding gas appliances used only for cooking. It should be placed between one and three metres from the appliance, either on the ceiling at least 300mm from any wall, or high on a wall but not within 150mm of the ceiling. Our guide on whether you need a carbon monoxide alarm explains the rules for homeowners and landlords.

Smoke control areas and Ecodesign

Large parts of the North East are smoke control areas. In these you can only burn authorised fuels, unless your stove is a Defra-exempt appliance, in which case you must use the fuel it is approved for. See our guide to smoke control areas for details.

Separately, Ecodesign rules have applied to new stoves placed on the market in Great Britain since 1 January 2022. They set limits on emissions and minimum efficiency, so a new stove from a reputable retailer should meet them.

Listed buildings, conservation areas and National Parks

Building Regulations are only part of the picture. If your home is listed, you are likely to need listed building consent for a new flue, liner or changes to a fireplace, even internal ones. In conservation areas and National Parks, permitted development rules are tighter, and an external flue on the front elevation or on a side facing a road may need planning permission. Within the Northumberland National Park, the National Park Authority is the planning authority. If any of this applies, check with your local planning authority before work begins.

Get it right first time

A compliant installation protects your family, your home and its value. A survey will check your chimney or flue route, hearth, ventilation and any local restrictions before you commit. If you are planning a new wood burner installation, contact us to arrange a survey and a written quote.