Do You Need Building Regulations for a Bathroom?

Short answer: replacing a bathroom in the same place usually does not need a building control application, but parts of the work still have to meet the regulations. Electrical work, ventilation and any new drainage always do.

Creating a new bathroom or en suite where there was not one before is different, and that normally does involve building control.

Usually no application needed

Swapping a bath, basin, toilet or shower in the same position.

Retiling and redecorating.

Replacing an extractor fan on the same circuit.

The work still has to comply with the regulations, it just does not usually need a separate application.

Where the regulations definitely apply

Electrical work in a bathroom is notifiable and must be certified. We provide the certificate for the work we do.

Ventilation: bathrooms need adequate mechanical extraction, especially internal rooms with no window.

New or altered drainage and soil connections.

Structural change, such as forming a new opening or altering floor joists for a wet room.

Creating a new bathroom or en suite

Converting a bedroom or cupboard into a bathroom normally needs building control approval.

Loft and garage conversions with bathrooms will be covered by the wider conversion approval.

Listed buildings and conservation areas may bring extra consents, separate from building regulations.

Frequently asked questions

Do you handle the paperwork?

We provide certification for the electrical work we carry out and tell you plainly at survey if your job needs a building control application.

What happens if the previous work was not certified?

We will tell you what we find. Where old electrics cannot be certified safely, we price putting it right rather than tiling over it.

Does a wet room need approval?

The waterproofing itself usually does not, but drainage changes and any structural alteration to the floor can.

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