This luxury new dwelling comprising generous living spaces including a swimming pool and home cinema in the basement has been designed to allow each level to enjoy the benefits of close links with a private garden. The house was constructed using insulated concrete formwork for the walls and SIPS panels for the roof. This has resulted in a highly insulated building which is fundamental to achieving the sustainability criteria adopted by Harrogate Council for all new-build houses. The windows and glazed doors are either thermally efficient triple-glazed or double-glazed with an insulating transparent film; floors and flat roof areas are heavily insulated such that a continuous envelope of insulation is wrapped around the exposed elements of the building. The house has underfloor heating which is served by air-source heat pumps and there is a combined heat and power unit for the swimming pool which generates electricity as a by-product.