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Extensions

Is building regulations approval needed for an extension?

Most extensions of properties require approval under the Building Regulations.

There are a number of classes of new buildings or extensions of existing buildings that do not need Building Regulations approval, i.e. are exempt from the Regulations. Read more about exemptions.1

The following pages give an indication of some of the elements normally required to satisfy the requirements of the Regulations when building an extension.

The following common work sections give an indication of several other elements normally required to satisfy the requirements of the Regulations when building an extension:

You must also find out whether the work you intend to carry out falls within The Party Wall etc. Act 19969.

A planning consultant may help with the smooth running of your extension project, and guide you on your building regulation requirements. To find an accurate consultancy quote, explore Studio Charrette's calculators10

Find a Trade Professional

Use our partner directories from CIAT, FMB, RIBA, or RTPI to find an chartered architectural technologist, builder, architect or planning consultant to help with your project or development.

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Useful links

Make an application Planning consultancy calculator
    1. https://www.planningportal.co.uk/applications/building-control-applications/building-control/building-regulations/exemptions-from-building-regulations
    2. https://www.planningportal.co.uk/permission/common-projects/doors-and-windows
    3. https://www.planningportal.co.uk/permission/common-projects/drains-and-sewers
    4. https://www.planningportal.co.uk/permission/common-projects/electrics
    5. https://www.planningportal.co.uk/permission/common-projects/external-walls
    6. https://www.planningportal.co.uk/permission/common-projects/kitchens-and-bathrooms
    7. https://www.planningportal.co.uk/permission/common-projects/internal-walls
    8. https://www.planningportal.co.uk/permission/common-projects/roof
    9. https://www.gov.uk/guidance/party-wall-etc-act-1996-guidance
    10. https://www.planningportal.co.uk/permission/home-improvement/planning-consultancy-calculator

    The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing and Communities (DLUHC). All content © 2024 Planning Portal.

    The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing and Communities (DLUHC). All content © 2024 Planning Portal.