Download our guide to extending your home

You don't need building regulations approval for some projects such as loft and garage conversions: see Exempt Buildings and Extensions.

Find out more

Plan and design your extension

Before you begin work on extending your home, get some advice from:


Building control applications and fees

Contact us

Building Control
Merton Civic Centre
London Road

Telephone: 020 8545 3145
Lines open 9-12am for booking site visits and 3-5pm for Technical queries

If you urgently need to report a dangerous structure: 020 8274 4901

Or out-of-hours emergency line: 020 8543 9750