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Planning Permission

Rules, known as ‘permitted development’ rights, allow you to extend a house without needing to apply for planning permission if specific limitations and conditions are met.

If you want to exceed these, then it is likely that an application for householder planning permission will be required.

If the work adds over 100 square metres of floor space, it may also be liable for a charge under the Community Infrastructure Levy1.


Please note:

These rules apply in the context of the proposed extension and any previous extensions (i.e. the ‘total enlargement’).

These rules apply to houses only and not to:

  • Flats and maisonettes (view our guidance on flats and maisonettes2).
  • Converted houses or houses created through the ‘permitted development’ rights for:
  • Other buildings.
  • Areas where there may be a planning condition, Article 4 Direction or other restriction that limits or removes ‘permitted development’ rights.
For all extensions
For side extensions
For single storey extensions
For extensions of more than one storey
Definitions


Further information

These rules summarise the text of Schedule 2, Part A, Class A of The Town and Country Planning (General Permitted Development) (England) Order 20154 (as amended5).

Detailed advice on complying with these rules, illustrative examples and further explanations of the terminology used are provided by the government in the ‘Permitted development rights for householders: technical guidance6’.

You are strongly advised to read this guidance to help understand how permitted development rules apply to the specific circumstances of any proposal.

A planning consultant may help with the smooth running of your project. To find an accurate consultancy quote, explore Studio Charrette's calculators7.

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/planning/policy-and-legislation/CIL/about-CIL
    2. https://www.planningportal.co.uk/permission/common-projects/flats-and-maisonettes/introduction
    3. https://www.planningportal.co.uk/permission/common-projects/change-of-use/use-classes
    4. https://www.legislation.gov.uk/uksi/2015/596/contents
    5. http://www.legislation.gov.uk/changes/affected/uksi/2015/596
    6. https://www.gov.uk/government/publications/permitted-development-rights-for-householders-technical-guidance
    7. 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.