Do I Need Planning Permission for a Garden Room in the UK?

Adding a garden room to your home is an excellent way to create additional space for a variety of uses, whether it's a home office, gym, studio, or simply a place to relax. However, before you embark on this project, it's essential to understand the planning permission requirements in the UK. Here's a comprehensive guide to help you navigate the regulations and ensure your garden room project goes smoothly.

Understanding Permitted Development Rights

In many cases, garden rooms can be built without planning permission under what is known as 'permitted development rights'. These rights allow homeowners to make certain changes to their property without needing to apply for formal planning permission. However, specific criteria must be met to qualify for permitted development:

Key Criteria for Permitted Development

  1. Size and Height:
    • The garden room must be single-storey and not exceed a height of 4 metres with a dual-pitched roof, or 3 metres with any other roof type.
    • The eaves must not exceed 2.5 metres in height if the garden room is within 2 metres of a boundary.
  2. Usage:
    • The garden room must not be used as a separate, self-contained living accommodation.
    • It should not include sleeping facilities.
  3. Location:
    • The garden room must be located in the rear garden.
    • It should not cover more than 50% of the total area of the original garden (the garden as it was first built on or as it stood on 1 July 1948).
  4. Designated Land:
    • If your property is located on designated land (national parks, Areas of Outstanding Natural Beauty, conservation areas, or World Heritage Sites), additional restrictions may apply.
  5. Listed Buildings:
    • If your property is a listed building, you will need to apply for planning permission regardless of the size and location of the garden room.

When Planning Permission is Required

If your garden room does not meet the permitted development criteria, you will need to apply for planning permission. Here are some scenarios where planning permission might be necessary:

  • Size Exceeds Permitted Limits: If your garden room exceeds the size or height restrictions.
  • Front Garden Installation: If you plan to install the garden room in the front garden.
  • Separate Living Accommodation: If you intend to use the garden room as a self-contained living space with sleeping facilities.

How to Apply for Planning Permission

If you determine that you need planning permission for your garden room, follow these steps:

  1. Consult with Your Local Planning Authority (LPA): Contact your LPA to discuss your project and obtain guidance on the application process.
  2. Prepare Your Application: Gather all necessary documents, including detailed plans and drawings of your proposed garden room.
  3. Submit Your Application: Submit your planning application to your LPA. There is usually a fee for processing the application.
  4. Await Decision: The LPA will review your application and make a decision, which typically takes 8 weeks.

Benefits of Working with eGardenRooms

At eGardenRooms, we understand the complexities of planning permissions and regulations. With 30 years of experience in the building trade, we offer expert guidance and support throughout the entire process. Our bespoke garden rooms are designed to meet your specific needs while complying with all relevant regulations.

Areas We Serve

We proudly serve the Home Counties and London, including:

  • London
  • Berkshire: Reading, Slough, Windsor
  • Buckinghamshire: Aylesbury, High Wycombe, Milton Keynes
  • Hertfordshire: Watford, St Albans, Hemel Hempstead
  • Essex: Chelmsford, Colchester, Basildon, Southend-on-Sea
  • Kent: Maidstone, Gillingham, Medway, Dartford, Tunbridge Wells, Ashford, Tonbridge
  • Surrey: Guildford, Woking, Epsom, Redhill


Understanding whether you need planning permission for a garden room is crucial before starting your project. By adhering to the permitted development criteria or securing the necessary permissions, you can ensure a smooth construction process. At eGardenRooms, we are here to assist you every step of the way, from initial planning to the final build. Contact us today to start creating your dream garden room.