Knowle House is set on a beautiful sloped site in Cranham, between Stroud and Gloucester. A glass extension provides a new living and dining space attached to the Grade-II Listed property. The extension has large contemporary glazed doors which slide back to connect the living space to the garden patio. A green roof finishes the flat roof and a projecting cantilevered canopy provides shading to control solar gain. Rainwater is captured firstly in the green roof, which then passes playfully down a ‘rain chain’ into the flower bed. A narrow slot rooflight fills the extension with natural daylight, washing across the original Cotswold stone wall, now incorporated within the extension to provide a feature wall. The ‘Horizon window’ is a key feature of the extension, framing views to Buckholt Wood. The window is carefully designed to ensure privacy while providing stunning uninterrupted views to the woodland on the horizon. An Outbuilding was also remodelled and extended to provide a home office, gym, workshop and storage rooms. The Outbuilding has Solar PV slates, providing electricity to the property whilst seamlessly blending in with the historic natural slate roof.