Extend your space. Elevate your home.

When your home needs to grow with you, an extension can be the perfect solution. Whether you’re expanding for a growing family, reimagining how you cook and entertain, or simply creating room to breathe — Excel Home Design delivers bespoke extensions that blend seamlessly with your existing property, inside and out.

A Smarter Way to Gain Space

Moving house isn’t always the answer. The costs of legal fees, stamp duty, surveys — not to mention the stress — quickly mount up. An expertly designed extension can give you the space and lifestyle you want, without the upheaval of relocating.

From large-scale open-plan kitchens to additional living rooms, utility spaces, home offices, or children’s playrooms, we’ll help you explore the possibilities for your property — and unlock the full potential of your home.

Designed for Your Life

Every extension starts with understanding your lifestyle. What do you want to do with the space? How will it connect with your existing rooms? What will it feel like to live in, day to day?

Our design team takes all of this into account — shaping your extension around how you want to live. From structural considerations to interior flow, every detail is planned with precision.

And because we design, manufacture, and fit everything in-house — from kitchens and cabinetry to flooring and finishes — you get one team, one process, and one beautifully delivered result.

Built-In Quality

Our reputation is built on craftsmanship and trust. Every extension we build is a reflection of our values — timeless design, intelligent space planning, and the highest standard of finish, right down to the last detail.

We match materials to your existing architecture, refine the interior flow, and install everything with care and precision. From underfloor heating to lighting and skylights, your new space won’t just feel bigger — it’ll feel right.

Excel Home Design, During renovation, scaffolding

Fully Managed from Start to Finish

With Excel, you don’t need to juggle trades or chase progress. We manage the full process — from design consultation and technical drawings to planning, construction, and final fit-out. That means less stress, clearer timelines, and confidence that your project is in safe hands.

Local Knowledge. Award-Winning Delivery.

Our new showroom in Tonyrefail, Rhondda Cynon Taff, is the perfect place to start your journey. We work across the South Wales M4 corridor — including Cardiff, Monmouth, Llanelli, the Valleys, and the Vale of Glamorgan — designing and building extensions that transform the homes and lives of our customers.