If you’re planning a home extension, you may not need planning permission. Some projects fall under permitted development rights, while others require a full application. The process typically takes eight to twelve weeks, but mistakes like incorrect plans or neighbour objections can cause delays. Draw Plan helps UK homeowners navigate planning regulations and secure approval faster.
Do You Need Planning Permission for Your Home Extension?
Some home extensions can be built under permitted development rights, meaning you won’t need planning permission if your project meets specific rules.
Permitted Development Criteria
- Rear extensions can extend up to six metres for semi-detached homes and eight metres for detached homes without permission.
- Side extensions must be no wider than half the width of the original house.
- Loft conversions do not need permission if they remain within forty cubic metres for terraced houses or fifty cubic metres for detached and semi-detached houses.
When Full Planning Permission Is Required
You must apply for planning permission if:
- The extension is two storeys high or wraps around the house.
- It changes the roof structure significantly.
- It affects neighbours’ privacy, light, or property views.
- Your property is in a conservation area or a listed building.
If you’re unsure, contact Draw Plan for expert guidance.
How to Apply for Planning Permission
Step 1: Get Professional Architectural Drawings
At Draw Plan, we provide accurate, council-approved building regulation drawings, ensuring your application meets the necessary standards.
Step 2: Consider a Pre-Application Consultation
Some councils offer pre-application consultations, allowing homeowners to discuss their project before submitting an official application.
This step helps you avoid common mistakes and adjust designs early. While not mandatory, it can save time and reduce the risk of rejection, especially for larger projects.
Step 3: Submit Your Planning Application
A successful application includes:
- Architectural plans outlining the extension.
- A site location plan showing the extension’s placement.
- A design and access statement explaining how it fits with the surrounding area.
Processing takes eight to twelve weeks, though larger projects may take longer. If you need help, our experts can assist.
Step 4: Be Ready to Modify Your Plans
Even strong applications can face council or neighbour objections.
Common reasons for rejection include:
- The extension is too large or does not match the surroundings.
- The project blocks light or overlooks neighbouring properties.
- The materials don’t match the existing home.
If modifications are required, Draw Plan can refine your design for a better chance of approval.
Draw Plan’s planning specialists can review your application and improve your chances of approval.
Why Work with Draw Plan?
Applying for planning permission can be complex and time-consuming, but Draw Plan simplifies the process by handling everything from initial design to final approval.
We offer:
- Custom home design plans that meet UK planning laws.
- Feasibility studies to assess whether your extension is likely to be approved.
- Building regulation drawings to ensure compliance with UK safety regulations.
- Full planning permission assistance, guiding you from design to submission.
To see real examples of successful projects, visit our portfolio.
Planning Permission for Home Extensions Questions Answered.
How long does planning permission take?
Though complex projects may take longer, most applications take eight to twelve weeks.
What if my planning permission is rejected?
You can modify your design and resubmit it or appeal the decision. If you need expert help, Draw Plan’s team is ready to assist.
How much does planning permission cost?
The householder application fee is £206, but additional costs may apply for structural reports or planning assessments.
Get Your Home Extension Approved Securing planning permission can be complex, with common rejections due to design flaws, overdevelopment, or neighbour objections. Draw Plan ensures your project meets approval standards, avoiding delays. Whether it’s a single-storey extension, loft conversion, or full renovation, our experts guide you every step of the way. Contact us today to start your extension project.
