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 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.
Whether you’re planning a new home or a commercial space, our new build services cover everything from concept to completion. We manage every stage of the build.
If you have an existing property that needs updating, our refurbishment team can give it a new lease of life. We handle projects of all sizes, from single rooms to entire properties.
Plumbing problems can be stressful, which is why BBS Design Build makes them easier to deal with. Our plumbers handle everything from small repairs to full installations.
Need more space in your home? Our loft conversion specialists across London turn unused attic space into bedrooms, home offices and living areas.
Extending your home is a practical way to make room for a growing family or add value to your property. Our house extensions are designed to blend with your existing structure.
A sound roof is essential to protect your property. Our roofing team can repair, replace or install a roof that looks good and gives lasting protection from the weather.
A fresh coat of paint can transform a room. Our skilled painters and decorators bring close attention to detail to every project, for a clean, high-quality finish.
We specialise in high-quality tiling that combines attractive design with practical performance, creating spaces that work as well as they look in homes and offices.
Your bathroom should be comfortable to use and easy to maintain. We offer bathroom design and installation services, using high-quality materials and fixtures.
The kitchen is the heart of the home and deserves careful planning. Our kitchen design and installation services give you a space that is practical for everyday cooking and good for entertaining.
The first impression of your property starts with the driveway. We design and build durable driveways that look good and improve the kerb appeal of your home.
Whether you’re looking for hardwood floors, stylish tiles or practical laminate, we provide professional flooring and tiling that suit your budget and requirements.
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:
We understand that your time matters, so we plan each project to keep disruption to a minimum. Our commitment to deadlines helps keep the work on track from start to finish.
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.
A Trusted Construction Company in London We value honesty and transparency in everything we do. Our quotes are itemised and fixed-price, with no hidden charges. That means you can budget with confidence and stay informed throughout the process.
Customer satisfaction is our top priority. We start by taking the time to understand your needs and preferences. We then provide solutions designed around your project and your budget, and we are available to answer your questions and support you throughout.
At BBS Design Build Transform we have detailed knowledge of the architectural character and the local planning requirements across North and West London. Whether your project is a modern wrap-around kitchen extension in Harrow, a high-end loft conversion in Wembley or a full property refurbishment in Edgware, 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
