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Planning Permission

If you want to add a conservatory to a house, then this falls within the same set of planning rules as any other home extension.

These 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 Levy.

If you are unsure, you are advised to contact your Local Planning Authority for guidance before starting any work.

Find your Local Planning Authority

Things to consider

You may find it helpful to use the following services to plan your home improvement project:

  • Build Aviator's estimating service
  • Studio Charrette's planning consultancy calculator

    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 maisonettes).
    • Converted houses or houses created through the ‘permitted development’ rights for:
      • ‘Changes of use’ (Schedule 2, Part 3, Classes G; M; MA; N; P; PA and Q) (as detailed in our change of use section)
      • ‘New Dwellinghouses’ (Schedule 2, Part 20).
    • 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 The Town and Country Planning (General Permitted Development) (England) Order 20151 (as amended2).

    Detailed advice on complying with these rules, illustrative examples and further explanations of the terminology used is provided by government in the ‘Permitted development rights for householders: technical guidance3’.

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

    Find a Trade Professional

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

    Find a trade professional


    Useful links

    Make an application Project estimating service


    Planning consultancy calculator Financing your project
      1. https://www.legislation.gov.uk/uksi/2015/596/contents
      2. http://www.legislation.gov.uk/changes/affected/uksi/2015/596
      3. https://www.gov.uk/government/publications/permitted-development-rights-for-householders-technical-guidance

      The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing & Communities. All content © 2022 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 & Communities. All content © 2022 Planning Portal.