How to Achieve a 100% Planning Approval Rate for Your Home Extension

London, UK

6/2/20253 min read

Achieving a 100% planning approval rate for your home extension is the gold standard for homeowners in London, Surrey, and the surrounding areas. With local planning regulations becoming increasingly complex, it’s essential to approach your project with a clear strategy and expert support. At NFA Architecture, we combine deep local knowledge, meticulous planning, and a client-focused approach to help you secure approval for your dream extension—every time.

Why Planning Approval Matters

Securing planning permission for your home extension is not just a legal requirement—it’s your ticket to a smooth, delay-free build. Without it, you risk costly fines, legal disputes, and even having to undo completed work. For homeowners in London and Surrey, understanding the process and working with experienced professionals can make all the difference.

Key Steps to a 100% Planning Approval Rate

1. Understand Local Planning Policies

Every borough in London and council in Surrey has its own planning policies. These cover everything from the size and scale of your extension to its impact on neighbours and the character of the area. Before starting, research your local authority’s guidelines or consult with a specialist like NFA Architecture, who can interpret these rules for you.

2. Optimise Your Design for Compliance

Your extension design must meet both your needs and the requirements of planning authorities. This means:

  • Respecting size limits (e.g., single-storey rear extensions up to 8m for detached houses and 6m for others under permitted development in many cases).

  • Considering the impact on neighbours’ light and privacy.

  • Ensuring materials and appearance complement the existing property and local streetscape.

A skilled architect will help you balance ambition with compliance, maximising your space while minimising objections.

3. Take Advantage of Permitted Development Rights

Many home extensions in London and Surrey can be completed without full planning permission under permitted development rights. These rights allow certain types of extensions—like modest rear or side additions—provided they meet strict criteria. An expert can help you determine if your project qualifies and secure a Certificate of Lawful Development, streamlining your approval process.

4. Prepare Detailed and Accurate Plans

Planning officers need clear, comprehensive drawings and supporting documents to assess your application. This includes:

  • Scaled floor plans and elevations

  • Site location plans

  • Design and access statements (where required)

  • Accurate measurements and materials specifications

NFA Architecture’s attention to detail ensures your submission is complete and professional, reducing the risk of delays or refusals.

5. Engage with Neighbours Early

Neighbour objections are a common reason for planning delays or refusals. Before submitting your application, share your plans with neighbours and address any concerns. This proactive approach can prevent objections and demonstrate goodwill to planning officers.

6. Work with Local Experts

Choosing an architect with a proven track record in your area is vital. Local experts understand the nuances of council policies, have established relationships with planning officers, and know how to present your case for the best chance of approval. At NFA Architecture, our high approval rate is built on years of experience in London and Surrey.

7. Navigate the Prior Approval Process for Larger Extensions

If you’re planning a larger extension, you may need to follow the “prior approval” process. This involves notifying the council and neighbours, who have 21 days to respond. If there are no objections, or if the council deems concerns unfounded, approval is typically granted2. NFA Architecture can guide you through every step, ensuring all paperwork and notifications are handled correctly.

8. Stay Up to Date with Changing Regulations

Planning rules evolve regularly, especially in fast-growing areas like London and Surrey. Working with professionals who stay current with the latest regulations ensures your application is always compliant.

Why Choose NFA Architecture?

  • Local Expertise: We specialise in home extensions in London, Surrey, Worcester Park, and nearby areas.

  • Meticulous Planning: Our team prepares every application with precision, maximising your chances of approval.

  • Transparent Communication: We keep you informed at every stage, from initial consultation to final approval.

  • Proven Track Record: Our 100% planning approval rate speaks for itself.

Frequently Asked Questions

Do I always need planning permission for a home extension?
Not always. Many smaller extensions fall under permitted development rights, but it’s vital to check local rules or seek professional advice.

How long does the planning approval process take?
Typically, 8-10 weeks for most councils, but this can vary depending on the complexity of your project and local authority workload.

What if my property is in a conservation area or is listed?
Special rules apply, and you’ll likely need full planning permission. NFA Architecture has extensive experience navigating these cases.

Ready to Start Your Home Extension?

Achieving a 100% planning approval rate is possible with the right approach and expert guidance. Contact NFA Architecture today for a free consultation and let us help you unlock the full potential of your home in London, Surrey, or Worcester Park.