The Market Design and Build

Loft Conversions

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Website | 020 3715 5892
320 High Street Harlington, Harlington, Hayes UB3 5DU, UK

Opening Hours:
Monday: 9:00 AM – 6:00 PM
Tuesday: 9:00 AM – 6:00 PM
Wednesday: 9:00 AM – 6:00 PM
Thursday: 9:00 AM – 6:00 PM
Friday: 9:00 AM – 6:00 PM
Saturday: Closed
Sunday: Closed


Area Served:
Within 4 miles (6.4km) of 320 High Street Harlington, Harlington, Hayes UB3 5DU, UK
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The Market Design & Build is London’s leading home extensions and loft conversions company. Having undertaken hundreds of bespoke projects, including roofing, loft conversions, home extensions and new builds, we have established ourselves as one of the most dedicated and professional Design and Build companies in London and the surrounding areas. Unlike many other firms, we keep everything under one roof and offer a complete end-to-end service including the consultation, planning, design and execution of a project. We are a trusted and much sought-after company with many satisfied and returning clients who have kindly given us over 700+ positive reviews on Checkatrade and a 5-star rating on Google Reviews. Whether you are looking for a brand-new kitchen extension, a loft conversion or even a complete home refurbishment, The Market Design and Build London is here to assist you. Our professional in-house team have a wealth of knowledge and experience which we can use to help you build the property of your dreams.

Google Rating: 4.9 out of 5 stars (183 total ratings)

Tom Manton
5 Star
The market design and build have helped design our single storey wraparound extension,including submitting for planning which was approved on second submission due to living within conservation area. So some key changes had to be made which was not an issue and happened relatively fast .We are self delivering the work and they are more than happy to help over the phone with any queries so far, They pride themselves on quality which is apparent with there drawings produced. Great experience so far, and would definitely recommend
Thursday 11th April 2024
Laura Nelson
5 Star
Excellent job by the team. Chetan arranged the task and was polite and efficient from day 1. The works were carried out with care, consideration and thoroughness. Thank you to all.
Wednesday 1st May 2024
Dil Badhan
5 Star
I reached out to the Market Design & Build team for an initial architectural design and structural package for a renovation of my new kitchen. I had read good reviews online, and I can safely say, working with the Team, I was not disappointed. I was hugely impressed with the way they firstly devised 3D images of my new kitchen which was professionally done by the architects. following a Teams call to discuss the requirements for a new kitchen, the final design was amazing. As my project required structural alterations the team put together a very detailed structural report which outlined everything I needed to know regarding the structural alterations and the appropriate building regulations required. The Teams at MDB kept me constantly updated and guided me through the process, answering all my questions in detail. I would highly recommend using their architectural design and structural services before undertaking a huge building project.
Monday 12th February 2024
Catherine Ayling
5 Star
We chose the The Market Design & Build to draw up our plans and get the architectural drawings through planning at Ealing council as we wanted a wrap around service. I can truly say that this is what we got. There were challenges with this project and communication was essential. All the staff we needed to speak to were available and we had regular meetings often over teams as needed. We have also had the structural drawings undertaken by TMDB and are now waiting on our quote for the building works. I would highly recommend this company and we are now on the journey of having our extension built. I like the fact that there are site visits and James' initial visit brought about some great ideas.
Thursday 18th April 2024
Aneka Lewis
5 Star
Architectural Design and Structural Package We chose TMDB after reading the positive reviews on this site and meeting with James Hughes to discuss our plans for a single storey rear extension. He was very informative and talked my husband and me through the design to build process in stages. Our architects Peter and Daniel have created a thoughtful and comprehensive design that fully meets our requirements. We are very pleased with the service received and would recommend without reservation.
Thursday 8th February 2024