Building regulations for home extensions
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Planning Duty Officer Telephone Service
Our Planning Duty Officer phone service is currently unavailable.
If you have a live planning application, please email your Planning Officer directly. You can find their contact details in:
- your planning application acknowledgement letter
- any emails or letters about your application
For general planning enquiries, planning guidance, planning enforcement information, viewing or tracking planning applications, visit our Planning and Building Control webpages: www.rbkc.gov.uk/planning-and-building-control
Last updated: 17 September 2026
What's in this guide
Our homeowner's guide to building regulations for home extensions covers:
- why it’s beneficial to use your council’s building control service
- what Building Regulations are and why they apply to your extension
- competent person schemes
- planning permissions and other approvals you need
- finding experts for your home extension
- building a new extension
- conversions
- alterations
- energy efficiency
Read our guide
Read our guide for home extensions.
Last updated: 4 February 2026