BBS Design Build Transform designs, builds and transforms homes across London: house extensions, loft conversions, full refurbishments and new builds under one contract.
Lofts
Extensions
Designs
New Builds
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Welcome to BBS Design Build Transform, a London design and build company where quality craftsmanship and reliable service come together to create lasting results. With years of experience across commercial, renovation and residential projects, we have built a strong reputation for delivering spaces that truly reflect our clients’ vision.
Our team of skilled builders and tradespeople looks after ,at every stage, from planning and design to project completion Whether you want to transform your home, refurbish an office or start a new build, we bring careful planning and close attention to detail to every project.
Choosing the right builder in London can feel overwhelming. A proven track record, clear communication and a commitment to high standards help you move forward with confidence. Let us turn your ideas into reality with construction services that suit your budget and requirements.
Complete homes built from the ground up, from site checks and design to handover.
Strip-out, rewiring, new kitchens and bathrooms, and a fresh finish throughout.
Full bathroom renovations with plumbing, tiling and premium fixtures.
Browse a selection of our recent house extensions, loft conversions, refurbishments and new builds, with photos from completed projects across London.
There are hundreds of building companies in London. Here are four reasons to choose BBS Design Build Transform for your project:
For 15 years, we’ve built extensions, lofts, new builds and full refurbishments across London.
We are committed to delivering quality workmanship and check every detail against a high standard before handover. Our professional team uses carefully chosen materials and proven building techniques to achieve lasting results.
One team takes your project from drawings to handover, so nothing gets lost between designer and builder.
Your written quote sets out the scope, materials and a clear timeline.
BBS Design Build Transform builds across North and West London, with detailed knowledge of the local planning requirements and the character of each neighbourhood. Whether your project is in Harrow, Pinner, Heston and Brentford, Wembley, Edgware or West Drayton, our local expertise helps keep the work smooth and compliant. We combine sound structural engineering with well-considered, functional design that suits the way you live. Each build is tailored to suit its neighbourhood and to add value to your home.
Don’t leave your property investment to chance. Contact BBS Design Build Transform today to arrange a no-obligation site survey and a detailed, fixed-price structural quote.
Builders’ rates in London typically average £300 to £450+ per day. On a major extension or loft conversion, a daily rate can push costs up unpredictably. BBS Design Build Transform provides fixed-price, itemised structural quotes, giving homeowners clear project costs from day one and reducing the risk of unexpected expenses during construction.
A design and build contractor takes responsibility for the whole project, from design to completion. Traditionally, homeowners have to coordinate an architect, a structural engineer and a builder separately. BBS Design Build Transform manages the architectural drawings, planning permission, structural engineering and construction under a single contract, giving you one point of contact throughout.
Before choosing a builder, homeowners should check for:
A standard home extension in London generally costs £2,200–£3,500+ per m², depending on the specification, location, materials and structural complexity. High-end projects can cost more because of additional design features and premium finishes.
A detailed site survey identifies structural requirements early, so homeowners can understand the likely project costs and gain budget certainty before construction begins.
BBS Design Build Transform reduces the risk of unexpected costs through detailed site investigations, clear project planning and transparent, itemised quotations before construction begins.
If unforeseen structural issues are found during the build, we give you a clear explanation of the problem, the proposed solution and a transparent cost breakdown before additional work goes ahead.
This approach helps maintain trust and keeps the project organised from start to finish.
Homeowners planning an extension or loft conversion may need a Party Wall Agreement if the work involves a shared wall, a boundary structure or excavation near a neighbouring property.
BBS Design Build Transform guides homeowners through the Party Wall process, advising on the requirements and helping with the necessary notices to minimise delays during construction.
Still have questions? Speak with our team
