Free Extension Feasibility & Cost Assessment

House Extensions

Single Storey 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

Single Storey 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

Single Storey 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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Single Storey Extensions

Searching for expert builders in Cardiff?

Looking for reliable  single storey extension builders in Cardiff?

At James White Construction LTD, we specialise in delivering high-quality single storey extensions tailored to the needs of homeowners across Cardiff. As a trusted local extension company, we offer a complete design-and-build service to create practical, stylish living spaces.

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

At James White Construction LTD, we specialise in delivering high-quality single storey extensions tailored to the needs of homeowners across Cardiff. As a trusted local extension company, we offer a complete design-and-build service to create practical, stylish living spaces.


Our services include bespoke kitchen extensions, dining areas, and open-plan living spaces, all built to current building regulations. We manage every stage of the project, from groundwork and structural work to roofing, electrics, plumbing, and finishing touches. From compact extensions to full ground-floor expansions, our experienced builders deliver durable, professional results that enhance your home’s comfort, functionality, and value.

Our services include bespoke kitchen extensions, dining areas, and open-plan living spaces, all built to current building regulations. We manage every stage of the project, from groundwork and structural work to roofing, electrics, plumbing, and finishing touches. From compact extensions to full ground-floor expansions, our experienced builders deliver durable, professional results that enhance your home’s comfort, functionality, and value.

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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.

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Cardiff’s Trusted Experts

Enhance Your Property with a Single Storey Extension

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

A well-designed single storey extension doesn’t just add space, it increases property value and improves everyday living. Our single storey extension services in Cardiff transform homes with carefully planned layouts, quality construction, and seamless finishes, perfect for kitchens, dining areas, and open-plan living spaces. Trust us to bring your vision to life with a single storey extension that enhances your home in Cardiff.

Contact Professional Single Storey Extension Builders

Ready to upgrade your home in Cardiff? Call us today or request a free single storey extension quote. We’re proud to be Cardiff trusted single storey extension specialists, delivering exceptional results 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.

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