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Builders in Merton & South West London

Beautiful spaces. Built to last.

At 3D Design & Build, we create home extensions, loft conversions, new builds and architectural designs across Merton, Wimbledon, Kingston, Richmond and Sutton. Whether you’re planning a full house renovation or a bespoke extension, our experienced team is here to bring your vision to life.

What we do

Expert Installations, Repairs & Custom Building Work Across South West London

We deliver high-quality building services in Merton, Wimbledon, Kingston, Richmond and Sutton – from modern house extensions and loft conversions to bespoke renovations and full new builds.

House Extensions

We can take on both single-storey and multi-storey house extensions. These can add a huge amount of value to your property, while giving you an extra bedroom, lounge or kitchen to enjoy. House extensions can be part of wider house refurbishments or a standalone project.

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Loft Conversions

Many properties have spacious garages and lofts which are under-utilised, constituting extra storage for items that are rarely used. These have a huge amount of potential. They could be turned into an extra bedroom, home office, games room – whatever you can think of!

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Renovations & Refurbishments

We have completed a variety of Kitchen, Bathroom & full home Renovations in and around Sutton & Wimbledon.

We can produce a 3D architectural design of your desired renovation or refurbishment so you can see the vision before we make it a reality.

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Structural Carpentry & Roofing Frameworks

From pitched roof structures to internal stud walls, we specialise in all aspects of structural carpentry. Our team builds strong, regulation-compliant frameworks for new builds, loft conversions, and house extensions across South West London.

Precision Framing & Bespoke Joinery

At 3D Design & Build, our expert carpenters craft precision timber frames and custom joinery for home extensions, loft conversions, and structural builds. Every frame is made to measure, ensuring a solid, long-lasting foundation tailored to your property’s design.

Made-to-Measure Timber Work

We deliver fully bespoke timber features – including staircases, partition walls, roof trusses and more. Whether it’s part of a large renovation or a one-off installation, our joinery work is always built to last and finished with care.

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Building Services You Can Trust

At 3D Design & Build, we specialise in complete home transformations across Merton, Wimbledon, Kingston, Richmond and Sutton. From modern loft conversions to full-scale refurbishments and brand-new builds, we deliver high-quality craftsmanship tailored to your lifestyle.

Start your project today

Loft conversions
House refurbishments
New builds
House extensions
Custom carpentry, kitchen and bathroom fitting, roofing and structural work
Architectural plans and engineering support
Project management

Explore our existing project gallery and customer reviews, or read our home improvement guides.

Start with A Free Quote For Your Project

or call Now: 07881 883 890

About us

Trusted Builders in Merton, Wimbledon, Richmond, Sutton, Kingston & Across South West London

At 3D Design & Build, we deliver high-quality house extensions, new builds, full refurbishments and property conversions – all with an unmatched commitment to service and craftsmanship. Based in Merton, we proudly serve surrounding areas including Sutton, Wimbledon, Richmond and beyond.

Our clients value our honest approach, 24/7 aftercare support, and ability to handle every aspect of a build in-house. From groundwork and bricklaying to electrics, plumbing and final finishes – you only deal with one reliable team from start to finish.

We offer free, no-obligation estimates and never cut corners. Our reputation has been built on trust, attention to detail, and going the extra mile to deliver outstanding results on every project.

Read our customer testimonials and explore our project gallery to see more of our existing work.

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