Like-for-like replacements
Replacing kitchen units, doors and worktops in the same layout does not normally need planning permission or Building Regulations approval. The exception is a listed building, where you may need listed building consent even for internal changes. The rules below apply when you change services or structure.
Electrics
In England, electrical work is covered by Part P of the Building Regulations. The work that must be notified includes:
- Installing a new circuit, for example for an electric cooker, an induction hob or an island.
- Replacing the consumer unit (fuse box).
Most repairs and additions to existing kitchen circuits, such as an extra socket, are not notifiable, but they must still be done safely. The simplest route is an electrician registered with a competent person scheme, who can self-certify the work. Ask for an electrical installation certificate when the job is done.
Gas
Any work on a gas hob, oven or supply pipe must be done by a Gas Safe registered engineer. It is illegal for anyone else to do it. Ask to see their Gas Safe ID card and check what types of gas work they are qualified for.
Ventilation
Kitchens need extract ventilation to remove moisture and cooking fumes. Approved Document F sets minimum extract rates: for example, intermittent extraction of 30 litres per second where a cooker hood is ducted outside, or 60 litres per second from an extractor fan elsewhere in the kitchen. A recirculating hood alone does not meet this. Your kitchen fitter or electrician can advise on a suitable fan or hood.
Drains and plumbing
Moving a sink, dishwasher or washing machine to a new position may involve new waste pipes. New drainage connections and changes that affect drains are covered by Approved Document H. Simple waste runs to an existing stack are routine for a good plumber or fitter; anything more involved is worth checking with Building Control.
Knocking through
Removing a wall to open up a kitchen-diner is the change most likely to need Building Regulations approval. Load-bearing walls need a properly designed beam (usually with a structural engineer’s calculations), and removing walls can affect fire escape routes, particularly in homes with three or more storeys. Talk to Building Control before work starts.
Wales, Scotland and Northern Ireland have their own building rules. This guide covers England; elsewhere in the UK, check with your local council.
Last updated: 14 October 2026
