The clients approached LSD Architects in connection with the renovation of their family house in the Maida Vale Conservation Area in West London. Their brief consisted of three elements - a full width single storey rear extension to replace an existing extension, internal refurbishment of their three storey detached house, and a single storey garden outbuilding. Our design added a new mechanical ventilation system with heat recovery, heat pump and solar panels, and upgrades to the fabric of the building - new windows, insulated plaster, underfloor heating and high thermal mass elements. Planning permission was granted by Westminster City Council in 2023.