Thames Design & Build
Converting an underused garage is one of the most cost-effective ways to add living space to your home, turning a space that often just stores clutter into a usable room — a home office, gym, playroom, extra bedroom, or even a self-contained annexe.
Thames Design & Build provides garage conversions to properties located across South West London and Surrey, in areas including Kingston, Thames Ditton, Esher, Molesey, Walton-on-Thames, Cobham, Oxshott, Wimbledon, Richmond, Epsom, Leatherhead, Twickenham, Sheen, Kew, Dorking and Guildford.
Thames Design & Build
We handle everything from initial design through to final completion. Your project starts with a site visit where we assess the existing garage, floor levels, wall construction, and how the space connects to the rest of your home. Our design team then creates detailed drawings, and we handle any building regulations approval needed. Once approved, we provide a fixed-price quote covering all aspects of the build.
Two things make a real difference to a garage conversion. The first is the floor: if there’s already a step down from the house into the garage, there’s usually enough depth to install a damp-proof membrane, insulation, and screed over the existing slab. If not, the slab may need to come up, which adds to the cost – we’ll establish this at the survey stage so there are no surprises. The second is the external wall: many garages have only a single skin of brickwork, so we tank the wall internally and build an insulated timber frame behind it to keep the room warm and dry. During construction, your dedicated site manager coordinates all trades and keeps you updated throughout.
Tell us about your plans for your home. Our design and build team will guide you from first ideas through planning, approvals and construction.