Do I Need Planning Permission?
Many single-storey rear kitchen extensions fall under permitted development rights, meaning you may not need planning permission. However, this depends on several factors including the size of your extension, your property type, and location.
Permitted Development Rights
Under permitted development, you can extend your home without planning permission if your extension meets specific criteria:
Size Limits
- Detached houses: Extensions can extend up to 8m from the original rear wall
- Semi-detached and terraced: Extensions can extend up to 6m from the original rear wall
- Height: Maximum height of 4m
- Coverage: Cannot cover more than 50% of your garden
Other Requirements
- Materials must be similar in appearance to the existing house
- Extensions cannot be higher than the highest part of the existing roof
- No verandas, balconies, or raised platforms
- Side extensions must be single-storey, maximum 4m high, and no wider than half the original house width
When You Need Planning Permission
You'll need planning permission if:
- Your extension exceeds permitted development size limits
- You want a double-storey extension
- Your property is in a conservation area
- Your property is listed
- Your property is in an Area of Outstanding Natural Beauty (AONB)
- Your extension would affect a neighbour's right to light
The Planning Application Process
If you need planning permission, the process typically involves:
1. Pre-Application Advice
Many councils offer pre-application advice services. This can help you understand if your proposal is likely to be approved before submitting a formal application.
2. Application Submission
Submit your planning application to your local council with:
- Completed application forms
- Architectural drawings and plans
- Site location plans
- Design and access statement (for larger projects)
- Application fee
3. Consultation Period
Your council will consult with neighbours and other stakeholders. This typically takes 8-12 weeks, though complex applications may take longer.
4. Decision
You'll receive a decision notice. If approved, you can proceed with your extension. If refused, you can appeal or modify your plans and reapply.
Building Regulations
Important: Even if you don't need planning permission, you'll still need building regulations approval. This covers structural safety, insulation, fire safety, electrical work, and drainage. Building regulations are separate from planning permission and are required for all extensions.
Getting Help
Navigating planning permission can be complex. We work with trusted local architects and can guide you through the process. See our kitchen extensions page for more information, or contact us to discuss your extension project.