Loft Conversions

Loft extension from the outside

Thames Design & Build

Loft Conversions in Surrey & South West London

A loft conversion is one of the most cost-effective ways to add a bedroom, home office, or extra living space without extending your property’s footprint.

Thames Design & Build provides loft 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. 

Key Loft Conversion Facts

Typical size: 25–50m² depending on roof structure

Most projects take 8–12 weeks from start to completion

Often carried out under Permitted Development

Adds significant value while utilising existing unused space

Modern Bathroom with free standing bath that forms part of a loft extension at a home in Thames Ditton

Thames Design & Build

Our Process For Loft Conversions

We handle everything from initial design through to final completion. Your project starts with a site visit where we discuss your requirements and assess the existing roof structure. Our design team then creates detailed architectural drawings, which we submit for planning approval or building regulations as needed. Once approved, we provide a fixed-price quote covering all aspects of the build.

During construction, your dedicated site manager coordinates all trades and keeps you updated throughout. We handle structural work, stairs, electrics, plumbing, windows, and all finishing trades. Most loft conversions cause minimal disruption to daily life as the majority of work is contained within the roof space.

Ready to Transform Your Home?

Tell us about your plans for your home in Kingston, Wimbledon, Richmond, Esher, Cobham, Guildford and the surrounding areas. Our design and build team will guide you from first ideas through planning, approvals and construction.

Ready to Transform Your Home?

Tell us about your plans for your home. Our design and build team will guide you from first ideas through planning, approvals and construction.

How did you find us?