Thames Design & Build Ltd
Architect in Thames Ditton, Surrey
At Thames Design & Build, our focus has always been on delivering high-quality residential projects across South West London and Surrey. Established by Rob Allison in 2011, we have developed a multidisciplinary team capable of managing both the creative and practical aspects of home improvement. We proudly serve homeowners in locations such as Molesey, Cobham, Richmond, Epsom, Leatherhead and Guildford, offering services that include home extensions, loft conversions and structural alterations. By combining professional design expertise with hands-on building experience, we help our clients achieve solutions that suit their homes and lifestyles.We manage every stage of the design and build process, from initial consultations and architectural drawings to planning applications, approvals, construction and project oversight. This integrated approach helps eliminate the disconnect that can arise when multiple companies are involved. Supported by experienced and fully qualified tradespeople, including Gas Safe and ECA registered specialists, we complete projects ranging from kitchen and rear extensions to full house refurbishments and garage conversions. Our commitment is to provide a seamless experience and deliver finished spaces that work effectively in everyday use.
Areas Served
- Kingston Upon Thames Thames Ditton Esher Molesey Walton-on-Thames Weybridge Cobham Oxshott Wimbledon Richmond Epsom Leatherhead Twickenham Sheen Kew Dorking Guildford
Business Details
- Year established: 2011
- Number of employees: 20
Highlights & Specialties
- Residential design and build specialists across London Surrey
- Complete extensions conversions and refurbishment solutions delivered
- Architectural expertise combined with hands-on building experience
- Qualified designers managers and skilled tradespeople included
- Planning approvals and construction managed from start finish
- Trusted local service for homeowners transforming properties
Social Profiles
Contact Details
Products & Services
Architectural & Building Services
read moreAt Thames Design & Build Ltd, we deliver tailored design and construction services for homeowners. Our expertise covers home extensions, loft conversions, renovations, and bespoke architectural projects. We combine practical design with skilled craftsmanship. By managing planning, design, and construction together, we help create spaces that reflect our clients' aspirations.Rear Extensions
read moreWe specialise in rear extensions that enhance both space and functionality within the home. The process starts with an initial consultation and site assessment to establish what can be achieved. Our team then manages drawings, approvals, and construction works. We remain involved throughout to ensure a smooth and well-coordinated project.Kitchen Extensions
read moreBy extending your kitchen, we help you create a welcoming space for everyday life and shared moments at home. Our team handles design development, approvals, and construction under one service. We oversee structural elements, utilities, and finishing works. Each project is delivered with careful planning and ongoing updates.Side Return Extensions
read moreWe help homeowners expand their ground floors with thoughtfully planned side return extensions. Following an initial consultation, we prepare detailed drawings and arrange any necessary approvals. Throughout the build, a dedicated site manager keeps everything running smoothly. These extensions commonly deliver 1525m of extra space over a 1216 week programme.Loft Conversions
read moreOur approach to loft conversions is comprehensive and professionally managed. We guide you through the initial design phase before preparing architectural plans and securing approvals when necessary. A fixed-price quotation is provided once plans are confirmed. During the build, we coordinate each aspect to ensure consistent progress.Garage Conversions
read moreOur garage conversion service is designed to create valuable additional space within your home. We begin with a detailed site assessment to review construction details and floor levels. We also oversee any required building regulations approvals. Every project is delivered with a fixed-price quotation and careful coordination.Full House Renovations
read moreWe deliver full house renovations that transform properties from top to bottom. Our service can include extensions, loft conversions, internal reconfiguration, and the installation of new kitchens and bathrooms. We manage every stage from design to completion. A dedicated site manager oversees the entire project to ensure a seamless experience.Reviews Write a Review
A. C.
Jun 23, 2026
We engaged Thames Design & Build for our internal alterations and refurbishment project at our home in Surbiton. We chose them because we wanted a company that took care of both the design process and the build. Kris managed our project and kept us informed throughout with weekly on-site meetings, and the work was completed on time and on budget. The project has transformed our ground floor from a poorly laid-out, dark space into a light, airy one that suits our lives so much better. We wouldn't hesitate to recommend Thames Design & Build to anyone looking to carry out similar layout alterations and refurbishment work in the Surbiton area.
Rebecca Cleaver
Jun 15, 2026
We used Thames Design and Build for our single storey kitchen extension and wouldn't hesitate to recommend them. They helped us with the inital design and ideas through to architects plans and submission for planning permission. We then went on to use them for the build. From start to finish we found them to be professional, reliable, knowledgable and work to very high standards. Although we had a couple of unforseen challenges during the build - Thames Design & Build came up with solutions quickly and efficiently. Our project was spot on in terms of budget and timings. Communication at all times was excellent and the end result really did exceed our expectations. We would definitely use Thames Design & Build again in the future and would highly recommend them to anyone looking for a trustworthy, knowledgable design and construction company.
Andrew Ashbourne
Jun 04, 2026
Thames Design and Build are a friendly, efficient and hardworking company. They do excellent work and have skilful people. Do not employ anyone else until you have considered them first.
White & Lloyd
Apr 05, 2026
Working with Thames Design & Build is always a pleasure. We have worked alongside them across many project over the years, and they are always extremely detailed and thorough throughout the design phase, and consistently professional throughout every project, from conception to completion.
Tony Gold
Mar 09, 2026
Rob Alison and his team built a single story extension to our home. I can recommend them as 100% reputable and reliable. The communication was excellent throughout the build, nothing was too much trouble for them.good people,a classy five star service of the first magnitude.
And a special thank you to Saema who coordinated the project from beginning to end!
And a special thank you to Saema who coordinated the project from beginning to end!
Susan
Jul 16, 2025
Thames Design and Build were a friendly, professional and committed company, working to the highest standards. We had a single storey ground floor extension and new veranda. We were delighted with the results and we would have no hesitation in giving a strong recommendation.
Elizabeth Cannon
May 05, 2025
TDB designed and built a one storey wrap around extension for us and also refurbished two bathrooms. We were very pleased with quality of the work, which was completed in accordance with the contracted budget (although we did ask for a few extras on top, which meant additional cost). It was also completed in accordance with the agreed timescale with only a small overrun for completion of snagging. The site manager Ryan and his team were unfailingly pleasant and helpful and made a number of suggestions as the work progressed to enhance the original plan. Highly recommended.
Stephanie Taylor
May 02, 2025
We had a great experience with TDB! We’re 4 years on and still in love with our extension. Rob and the team were so attentive and organised which was great as I was having my first baby at the time of the build but every detail was thought through and well planned!
Paul Edwards
May 20, 2024
Thames Design and Build did a full remodelling of our ground floor. We are delighted with the work Rob and his team have done. I would be happy to recommend them and would definitely use them again. The whole team were professional and friendly. Most importantly they are always contactable to discuss anything relating to the project (even out of hours) and gave good advice throughout.
T. Fraser
Apr 02, 2024
When we needed to extend our ground floor, redesign the layout of the property, and do a hip-to-gable roof conversion we chose Rob and the team at Thames Design and Build. From the initial architect drawings, to the planning process, costings, project and supplier and specialist management, we were provided with excellent support. Ongoing communications and guidance throughout the project ensured that for our first build we were able to reduce the stress and uncertainty that comes along with such a big life decision. The project was finished on time and to a great spec. We would highly recommend Rob and the team for any home project - big or small.
Robert Griessel
Jan 01, 2020
Great friendly company that always goes the extra mile on jobs, would highly recommend.
Jane Bone
Jul 21, 2019
We were extremely happy with Thames design and Build, wonderful staff, and everyone was extremely helpful and the final result was more than we could have hoped for.
We have no hesitation in recommending this company a rare find thank you very much.
We have no hesitation in recommending this company a rare find thank you very much.
Eliza Sophia
Apr 20, 2019
Excellent, well run family business. In my experience, they are very reliable and trustworthy. I would most definitely recommend if you are considering an extension.
Mel Branson
Mar 12, 2019
Rob Allinson and the project team provided an extremely professional service from the drawing board through to completion of the works. The brief was set to provide a design and build solution for our loft that was in-keeping with the Edwardian house, and Thames Design & Build Ltd delivered the project to our exacting requirements. They managed the relationship and process with building control and were very proficient in transitioning design work into a high quality build. The work was completed on programme and to budget. We would have no hesitation in recommending Rob and the team.