Expert Builders in London, Surrey & West Sussex
Decades of Experience
With decades of combined experience, ONEbuild delivers high-quality building and construction services for clients across London, Surrey and Sussex. Our reputation is built on trust, craftsmanship and attention to detail.
Bespoke Construction Services
Whether you’re building from the ground up, reimagining your property, or renovating a cherished space with a loft conversion, extension or garden room, our team of skilled builders and visionary architects are dedicated to turning your ideas into stunning, functional reality. Every project is tailored to your lifestyle and budget.
Local Builders You Can Rely On
Operating from our Surrey branch in Leatherhead and our West Sussex branch in Chichester, we provide a responsive, personal service for homeowners and businesses across the South East. From initial consultation through to completion, we keep communication clear and reliable.
From Concept to Completion
We handle every stage of the process — design, planning, construction and finishing — ensuring every detail is meticulously crafted to meet your exact specifications. Our commitment to quality means we deliver results that stand the test of time.
Creativity Meets Craftsmanship
Discover the perfect blend of creativity and technical expertise with ONEbuild. By combining contemporary design with traditional building know-how, we create spaces that are not only practical but inspiring. Your vision becomes our mission.
Architecture & Building Services
Architecture & Design Services
Creative Thinking & Practical Planning
ONEbuild provide architecture & design services with a range of offerings that encompass architecture, planning, construction, and regulatory compliance.
Our architect works closely with clients from the conceptual stage, developing bespoke designs that align with both functional requirements and aesthetic preference.
From the initial site assessment and pre-application advice we work through designs and drawings to submitting the formal planning application and liaising with local authorities.
Whether you’re undertaking a small renovation or a large-scale development, ONEbuild is a trusted partner that can help you turn your vision into reality, while ensuring compliance with all necessary regulations.
General Building Services
Built with Care, Delivered with Pride
ONEbuild provide a full range of general building services, dedicated to turning your vision into reality with skill and precision.
From new builds that bring fresh structures to life, to creating functional and stylish annexes, garages and outbuildings, every project is carefully planned and delivered with the highest standards of craftsmanship.
Our team combine architectural expertise with hands-on construction knowledge, ensuring results that are both practical and visually impressive. With a commitment to detail and quality, ONEbuild have become the trusted choice for homeowners and businesses across the South East.
Loft Conversions
Add Light, Space and Style
ONEbuild specialise in transforming underused attic spaces into bright, functional rooms with our expert loft conversion services.
Whether you want to add valuable floor space with a dormer conversion, flood your home with daylight using Velux windows, or completely reshape your roofline with a hip-to-gable or mansard design, our skilled team delivers results that are both practical and beautiful.
Every loft conversion is handled with meticulous care and craftsmanship. We make sure the new space blends seamlessly with your existing home, while adding comfort, value and style.
Home Extensions
Add Space, Function and Value
ONEbuild specialise in designing and building extensions that expand living space while enhancing comfort and style.
Our expertise covers every type of extension project — from kitchen transformations that breathe new life into culinary spaces, to garage conversions that repurpose existing structures for added utility.
For larger changes, we deliver two-storey extensions, rear extensions that blend seamlessly with existing layouts, and side extensions that maximise space and improve home dynamics.
Each extension is crafted with care, combining practical design with high-quality workmanship to ensure the new space not only complements your home but also adds long-term value.
Outdoor Living Spaces
Add Comfort and Character
ONEbuild specialise in transforming gardens into functional and inviting extensions of your home.
Our expertise includes beautifully designed patios that provide the perfect backdrop for relaxation and gatherings, as well as garden kitchens that bring the convenience of indoor cooking to the outdoors. We also design and build summer houses that create charming retreats for leisure and enjoyment.
For clients seeking a productive workspace amidst nature, our bespoke garden offices offer a serene environment that blends seamlessly with the landscape.
With a focus on both quality and aesthetics, ONEbuild elevate outdoor living, ensuring every project adds comfort, character and long-term value to your property.
