Two Storey Extensions

Staircase connecting floors of a two storey extension in Surrey

Thames Design & Build

Two storey Extensions in Surrey & South West London

A two storey extension maximises the value of your building work by adding space on both ground and first floors, typically creating kitchen space below and bedroom space above.

Thames Design & Build provides two storey extensions 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 Two Storey Extension Facts

Most cost-effective way to add substantial space (versus two single-storey projects)

Projects typically take 18–24 weeks from groundworks to completion

Usually requires planning permission

Transforms both ground floor living space and upstairs accommodation

Thames Design & Build

Our Process For Two Storey Extensions

We handle everything from initial design through to final completion. Your project starts with a site visit where we discuss your requirements and assess what’s possible. Our design team then creates detailed architectural drawings, which we submit for planning approval and building regulations. 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, electrics, plumbing, glazing, and all finishing trades across both floors. These larger projects require careful planning and coordination to minimise disruption to your home.

Recently completed two storey extensions

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?