Free Extension Feasibility & Cost Assessment

House Extensions

Rear Extensions

Find out if your home can be extended:

• Planning permission guidance • Rough build cost range • Layout & size options  • Timeline expectations • Next step roadmap

ENQUIRE NOW

Free Extension Feasibility & Cost Assessment

House Extensions

Rear Extensions 

Find out if your home can be extended:

• Planning permission guidance • Rough build cost range • Layout & size options  • Timeline expectations

• Next step roadmap

ENQUIRE NOW

James White Construction LTD

Rear Extensions Cardiff

Free Extension Feasibility & Cost Assessment

Get a Quick Quote Today

Ready to extend your home? Fill out the form below and receive a free, no-obligation quote tailored to your project.

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Rear Extensions

Looking for reliable rear extension specialists in Cardiff?

Looking for reliable rear extension specialists in Cardiff?

At James White Construction LTD, we specialise in delivering high-quality rear extensions tailored to the unique needs of homeowners throughout Cardiff. As a trusted local rear extension company, we provide a complete design-and-build service to transform the rear of your home into practical, stylish living space.

A man is sitting in a blue bucket on a crane.

At James White Construction LTD, we specialise in delivering high-quality rear extensions tailored to the unique needs of homeowners throughout Cardiff. As a trusted local rear extension company, we provide a complete design-and-build service to transform the rear of your home into practical, stylish living space.


Our services include bespoke rear extensions for larger kitchens, dining areas, and open-plan living spaces, all built to current building regulations. We manage every stage of the project, including groundwork, structural work, roofing, electrics, plumbing, glazing, and finishing touches to ensure a seamless result. We also offer tailored layouts and custom designs to suit your property and lifestyle.

Our services include bespoke rear extensions for larger kitchens, dining areas, and open-plan living spaces, all built to current building regulations. We manage every stage of the project, including groundwork, structural work, roofing, electrics, plumbing, glazing, and finishing touches to ensure a seamless result. We also offer tailored layouts and custom designs to suit your property and lifestyle.

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Why Choose Us?

Why Cardiff Businesses Trust Us

Trusted Service


Dependable house extension services you can rely on from start to finish.

Local Knowledge


We understand local planning and building requirements and tailor every house extension to your property.

Affordable Rates


We offer cost-effective house extension solutions to suit your needs and budget.

Timely Service


We deliver house extensions efficiently, with clear timelines and minimal disruption.

A man is working on the side of a building with a crane.

Cardiff’s Trusted Experts

Enhance Your Home with Professional Rear Extensions

A man is working on the side of a building with a crane.

A well-designed rear extension adds valuable living space, increases property value, and improves how your home functions. Our rear extension services in Cardiff deliver bespoke designs tailored to your property and lifestyle. Trust us to transform the rear of your home with a rear extension that stands out in Cardiff.

Contact Us for Rear Extensions in  Cardiff

Ready to upgrade your home with a rear extension in Cardiff? Call us today or request a free quote. We’re proud to be Cardiff’s trusted rear extension specialists, delivering exceptional quality, bespoke designs, and outstanding service every time!

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Frequently Asked Questions

What You Need To Know

  • Do I need planning permission for a house extension?

    Not all house extensions require planning permission, as many fall under permitted development rights. However, this depends on the size, location, and type of extension. We can advise whether planning permission is needed for your house extension and help guide you through the process.

  • How long does it take to build a house extension?

    The timeframe for a house extension varies depending on the size and complexity of the project. On average, most house extensions take between 8 and 16 weeks to complete, once work begins.


  • How much does a house extension cost in the UK?

    The cost of a house extension depends on factors such as size, design, materials, and location. A site visit and detailed quote will provide an accurate price based on your specific requirements.

  • Will a house extension add value to my property?

    Yes, a professionally built house extension can significantly increase your property’s value while adding usable living space. Extensions such as kitchen extensions and open-plan living areas are especially popular with buyers.

  • Will you manage the entire house extension project?

    Yes, we offer a full design-and-build service for house extensions, managing everything from planning and groundwork to construction and final finishes for a smooth, stress-free experience.

ENQUIRE NOW