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  1. Welcome to Planning Portal
  2. Do you need permission?
  3. Common projects
  4. Outbuildings
  5. Planning Permission

Outbuildings

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  1. Planning Permission
  2. Is building regulations approval needed for an outbuilding?
  3. Building regulations: Foundations
  4. Building Regulations: Walls below ground level
  5. Building Regulations: Flooring
  6. Miniguide
  7. Can you build an annexe in your garden?
  8. Sustainability
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    Planning Permission

    Rules governing outbuildings apply to sheds, playhouses, greenhouses and garages as well as other ancillary garden buildings such as swimming pools, ponds, sauna cabins, kennels, enclosures (including tennis courts) and many other kinds of structures for a purpose incidental to the enjoyment of the dwellinghouse.

    If you are unsure if your planned building falls into the category of 'outbuildings' or if you are unsure if planning permission is required, please contact your local planning authority.

    Find your local planning authority (https://www.planningportal.co.uk/find-your-local-planning-authority)

    Find your local planning authority

    Other rules relate to the installation of a satellite dish, the erection of a new dwelling or the erection or provision of fuel storage tanks.

    Outbuildings are considered to be permitted development, not needing planning permission, subject to the following limits and conditions:

    • No outbuilding on land forward of a wall forming the principal elevation.
    • Outbuildings and garages to be single storey with maximum eaves height of 2.5 metres and maximum overall height of four metres with a dual pitched roof or three metres for any other roof.
    • Maximum height of 2.5 metres in the case of a building, enclosure or container within two metres of a boundary of the curtilage of the dwellinghouse.
    • No verandas, balconies or raised platforms (a platform must not exceed 0.3 metres in height)
    • No more than half the area of land around the "original house"* would be covered by additions or other buildings.
    • In National Parks, the Broads, Areas of Outstanding Natural Beauty and World Heritage Sites the maximum area to be covered by buildings, enclosures, containers and pools more than 20 metres from the house to be limited to 10 square metres.
    • On designated land* buildings, enclosures, containers and pools at the side of properties will require planning permission.
    • Within the curtilage of listed buildings, any outbuilding will require planning permission.

    *The term "original house" means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.

    *Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.

    Please note: The permitted development allowances described here apply to houses 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 permitted development rights.


    Permitted Development for householders – Technical Guidance

    You are strongly advised to read a technical guidance document produced by the UK Government to help understand how permitted development rules might apply to your circumstances.

    View 'Permitted development for householders – Technical guidance' on Gov.uk1

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    Useful links

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      1. https://www.gov.uk/government/publications/permitted-development-rights-for-householders-technical-guidance

      Disclaimer

      This is an introductory guide and is not a definitive source of legal information. Guidance is based on national rules, but additional local rules may also affect what permissions are needed. You should check if this is the case before applying or starting work.
      Guidance here relates to the planning regime for England, the policy in Wales may differ. If in doubt contact your local planning authority. Please note, local authorities may charge a fee for pre-application advice.
      Read our full disclaimer.


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          The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Ministry of Housing, Communities & Local Government (MHCLG). All content © 2025 Planning Portal.