Adding a garden room to your property can be a fantastic way to create extra living space, whether it’s for a home office, gym, studio, or relaxation area. However, before you start your project, it’s essential to understand the planning permission requirements to ensure compliance with local regulations.
Permitted Development Rights
In many cases, garden rooms fall under Permitted Development Rights, meaning you won’t need to apply for planning permission as long as you adhere to specific rules. The key conditions include:
- The garden room must not be used as a separate, self-contained living accommodation.
- It should be a single-story structure with a maximum eaves height of 2.5 meters and an overall height of 4 meters for a dual-pitched roof or 3 meters for other types of roofs.
- If the garden room is within 2 meters of a boundary, the maximum height must not exceed 2.5 meters.
- The total area covered by all outbuildings (including sheds and extensions) should not exceed 50% of the total land surrounding the house.
- It must not be positioned in front of the principal elevation of the house.
- The materials used should be in keeping with the existing property if located in a designated area.
‘Permitted Development Rights’ is a collection of allowable developments that you can build onto, or in the gardens of your property. We will happily discuss PDR with you along with the option to apply for a Certificate of Lawful Development, which we are able to undertake this your behalf.
When Planning Permission is Required
While most garden rooms do not require formal planning permission, you will need to apply in the following cases:
- If the structure exceeds the height and size limits stated under permitted development rights.
- If you live in a flat or a property that does not have PDR.
- If your property is a listed building, or you live in a conservation area, National Park, or Area of Outstanding Natural Beauty (AONB), where additional restrictions may apply.
- If the garden room is intended for residential use, such as a granny annex or a rental property.
- If the land surrounding your home has already been significantly developed, reducing the available space for further outbuildings.
Building Regulations Considerations
Even if planning permission is not required, you may need to comply with Building Regulations if your garden room:
- Is larger than 15 square meters and used for sleeping purposes.
- Is over 30 square meters in floor area, requiring compliance with fire safety, insulation, and structural integrity standards.
- Has electrical installations, which must meet UK wiring regulations.
Site Survey and Compliance
We provide tailored advice during our consultation and site survey to ensure your garden room meets all necessary requirements. Most of our garden rooms and studios already comply with or exceed building regulations while avoiding the need for formal applications and inspections by Building Control inspectors. Where building regulations apply, we guarantee full compliance and certification.
All electrical installations are carried out by qualified professionals, and clients receive a Part P certificate. Additionally, garden buildings with a floor area of 15 square meters that are within 1 meter of the boundary require fire spread protection measures, which are incorporated into the specification.
We appreciate that Planning Permission can be a daunting prospect, but our knowledgeable team are waiting to help you – please do reach out to us with any of your questions.
