With a site constrained by established trees, geothermal boreholes were carefully located to avoid root protection areas and link to a ground source heat pump providing heating and cooling to the building. A new basement was formed to accommodate the equipment, with duct routes carefully routed invisibly through the building’s fabric. Photovoltaic panels capture solar energy to help reduce emissions and batteries provide storage for vehicle charging and night time use. We were conscious to maintain a balance between building performance and architectural rigour and experience. Spaces are dynamic, flexible and controllable. A bespoke lighting design was developed with the client’s desire to be able to sit outside at all times of the year enabled through the architecture of a large, cantilevered overhang positioned to capture the last rays of the day.