This contemporary single-storey rear extension and refurbishment transforms an existing home in Surrey through a carefully considered programme of retrofit and modernisation. The design enhances the relationship between the house and garden, creating a light-filled open-plan living space while improving the overall functionality of the home. Alongside the new extension, the existing property was comprehensively refurbished to improve its performance, longevity and day-to-day usability. Sensitive material choices and carefully detailed interventions ensure the new and existing elements sit comfortably together, delivering a cohesive family home that balances contemporary design with the character of the original building.