The biggest size shed you might be able to build without needing planning permission can potentially reach up to 30 square meters (m²), although a more commonly referenced baseline is 15m². Achieving the larger size typically depends on meeting specific additional conditions beyond the general requirements.
Key Considerations for Shed Size and Planning Permission
When considering building a shed, understanding the permitted development rights is crucial to avoid the need for formal planning permission. These rights apply provided certain criteria are met regarding the shed's size, height, and placement within your property.
Here are the primary conditions that influence the maximum size and other characteristics of a shed built without planning permission:
- Single Storey: The shed must be a single-storey structure.
- Garden Coverage: It must not cover more than 50% of the total area of your garden. This includes any other existing outbuildings.
- Floor Area:
- A common guideline for sheds not requiring planning permission is a floor area of 15m².
- However, it may be possible to construct a shed up to 30m² if other specific conditions are also met. These additional conditions can vary based on local authority rules and the specific characteristics of your property.
It's important to remember that these are general guidelines. For instance, factors like the height of the shed, its proximity to property boundaries, and whether it's located in a conservation area or an Area of Outstanding Natural Beauty can also affect whether planning permission is required.
Summary of Shed Permitted Development Rules
To ensure your shed falls within permitted development rights, consider the following at a glance:
| Aspect | General Rule | Potential Maximum (with specific conditions) |
|---|---|---|
| Storeys | Single storey | Single storey |
| Garden Coverage | Must not cover > 50% of garden area | Must not cover > 50% of garden area |
| Floor Area | 15m² | Up to 30m² |
| Additional Factors | Proximity to boundaries, height, location. | Subject to further, unlisted conditions. |
Always verify with your local planning authority or consult the official government planning guidance, such as the Planning Portal, before commencing any construction. This ensures compliance with all regulations specific to your area and property.
