Inside, we merged kitchen, dining and living into one open-plan space, drawing daylight down through a circular rooflight, and converted the garage into a study. A hip-to-gable conversion adds the loft floor, its ridge raised to line up with the house next door and its new volume clad in profiled tiles. We insulated three elevations externally, switched to internal insulation on the party side to stay within the boundary, replaced every window with triple glazing, and removed the gas boiler for an air source heat pump with mechanical ventilation and heat recovery. The garden stays whole, and the house gained everything it needed within its existing footprint.