Skip to main content

Permitted Development Extensions In Surrey, Sussex & Dorset

A permitted development extension allows you to expand your home without going through the full planning permission process. For many homeowners, this means you can create valuable extra space more efficiently while still meeting planning regulations.

Plans Architectural Design supports homeowners planning permitted development extensions in Surrey, Sussex and Dorset, guiding projects from the initial design through to construction drawings and compliance documentation. Whether you are considering a rear kitchen extension or another form of extension without planning permission, the design must still meet permitted development rules and building regulations.

By carefully designing the extension from the outset, it is possible to create a practical new living space that integrates naturally with the existing property.

What Is A Permitted Development Extension?


A permitted development extension is an extension that falls within nationally defined planning rules. These rules allow certain home improvements to proceed without applying for full planning permission.

Many PD rear extensions involve expanding the kitchen or living area at the back of the property. The design must follow specific limits relating to height, depth, materials and how the extension relates to neighbouring properties.

Even when planning permission is not required, the extension still requires detailed drawings and approval under building regulations before construction can begin.

Projects across Surrey, Sussex, and Dorset often use permitted development rights to create practical kitchen extensions that open onto the garden and improve how the home functions day to day.

Lawful Development Certificates

Although a permitted development extension may not require full planning permission, many homeowners choose to apply for a lawful development certificate.

This certificate provides written confirmation from the local authority that the extension complies with permitted development rules. It can be particularly helpful when selling the property in the future, as it confirms the extension was approved under the correct planning framework.

Preparing drawings for a lawful development certificate ensures the extension design clearly demonstrates compliance with permitted development regulations.

Designing An Extension Without Planning Permission

Designing an extension without planning permission still requires careful planning and professional drawings.

The design must comply with national permitted development rules and building regulations.


The design process typically includes:

Permitted Development Extension Design

Developing layouts that meet permitted development limits while improving living space.

Lawful Development Certificate Drawings

Preparing documentation required for local authority confirmation.

Building Regulations Drawings

Technical drawings required before construction can begin.

Structural Calculations

Coordination with structural engineers to ensure the extension is buildable.

Construction Preparation

Providing the drawings and documentation required for builders to begin work.

This structured approach ensures the project is fully defined before construction begins.

Working With Permitted Development Builders


Once the extension design and technical drawings are complete, the project can move forward with experienced permitted development builders. Having a complete set of construction drawings helps ensure the build process runs smoothly and reduces the risk of delays or unexpected issues on site.

Plans Architectural Design prepares the full technical package required for builders and can assist clients in working with suitable design and build contractors in Surrey, Sussex, and Dorset.

This coordinated process allows homeowners to move confidently from design through to construction.

Permitted Development Extensions Across Surrey, Sussex & Dorset


Permitted development rights are widely used for residential projects across Surrey, Sussex, and Dorset, particularly for kitchen extensions and rear house extensions.

By working with experienced designers, homeowners can make the most of these planning rules while ensuring the extension remains proportionate to the existing property and fits comfortably within its surroundings.

Each project focuses on creating practical, well-designed living spaces that improve the everyday use of the home.

Book a Consultation


If you are considering a permitted development extension, an early consultation can help you understand what is possible for your property.

Plans Architectural Design offers a free, no-obligation consultation to discuss your project, permitted development requirements and the next steps.

Book your consultation today to begin planning your extension.

You agree to how we use your data as explained in our Privacy Policy