Smart Guide to Extension in Conservation Areas

Breathing New Life Into Protected Spaces

Living in a conservation area has its rewards: charming architecture, tree-lined streets, and a strong sense of heritage. But when your beautiful period property needs more space, the process of extending it comes with unique challenges. At KT5 Construction, we specialise in building extensions in conservation areas with sensitivity, precision, and full compliance.

Whether you live in Surrey, London, or anywhere near the M25, our expert team can help you expand your home while preserving its character. This guide explains everything you need to know about planning permission and how to make your project a success.

What Is a Conservation Area?

Conservation areas are designated by local councils to protect architectural or historic significance. They can include Edwardian and Victorian streets, village centres, or even woodland landscapes. Any building work in these zones must enhance or preserve the local character.

That’s why carrying out an extension in conservation area homes requires careful planning, thoughtful design, and the right professional guidance. With KT5 Construction, navigating these requirements becomes a seamless process.

Why You Need Planning Permission for an Extension in Conservation Area

In most cases, permitted development rights are restricted or removed entirely in conservation areas—particularly under an Article 4 Direction. This means even simple projects like a side extension, rear extension, or replacing doors and windows often require full planning permission.

Your application will need to demonstrate:

Design harmony with the surrounding area
Use of high-quality, sympathetic materials
Preservation of key architectural features
Compliance with any Article 4 Directions
Consideration of neighbouring properties and the streetscape

What Your Planning Application Should Include

To improve your chances of approval for an extension in conservation area, your planning application should include:

A Design and Access Statement explaining your project
Architectural drawings: site plans, elevations, and layouts
A heritage impact assessment (if required)
Details of proposed materials in relation to the original property
Photographs or historical context to support your case

Tip: Start with pre-application advice from your local authority. While not mandatory, it can help shape your application in line with local expectations.

Our Experience With Extensions in Conservation Areas

At KT5 Construction, we have extensive experience delivering renovations and extensions in conservation zones. We collaborate with conservation officers, architects, and planning departments to ensure every project is carried out with care.

We’ve successfully managed projects such as:

Single-storey rear extensions for open-plan living
Side-return conversions in Victorian terraces
Double-storey and wraparound builds that balance heritage with modern comfort

Our in-depth knowledge of local character and planning regulations helps us anticipate challenges and avoid costly delays.

The KT5 Conservation Extension Process

Every project begins with a detailed consultation. We listen to your needs, review historical context, and assess planning data before proposing tailored solutions.

Our process includes:

Planning Application Management – preparation of drawings, design statements, and submissions
Design Collaboration – ensuring plans meet your vision and council expectations
Material Selection – recommending period-appropriate finishes
Construction & Quality Control – delivering high-quality builds while preserving original features

FAQs: Extension in Conservation Area Planning

1. Do I always need planning permission in a conservation area?

Yes, especially for side, wraparound, or double-storey extensions.

2. What is an Article 4 Direction?

It restricts permitted development rights, requiring full planning permission for most changes.

3. Do I need conservation area consent?

Only for demolitions, such as removing boundary walls or outbuildings.

4. Can I use modern materials?

Yes, but they must be sympathetic to the existing property and approved by the council.

5. How long does approval take?

Typically 8–12 weeks, plus design and preparation time.

Why Choose KT5 for Your Extension in Conservation Area?

Navigating conservation planning rules can feel overwhelming. With KT5, you don’t go it alone. We manage planning applications, liaise with conservation officers, and deliver outstanding builds that respect your home’s heritage.

Whether you’re in Reigate, Dorking, or another protected part of Surrey, we bring clarity, confidence, and craftsmanship to every project.

Start Your Extension in Conservation Area Journey Today

If you’re dreaming of more space but live in a protected area, KT5 Construction is your trusted partner. We know the rules, and we know how to work with them to deliver stunning results.