Cambridge, Cambridgeshire
Just off the main road in the Cambridge conservation area, close to the River Cam and 20 minutes’ walk from the city centre, is an eco-house hidden in the middle of a marauding garden. The L-shaped, single-storey home is built around protected trees such as the rare liquidambar in the centre of the plot – which is also home to 19 species of butterfly, newts and dragonflies. The three-bedroom property has a storeroom, workshop, separate studio and a green sedum roof that provides further biodiversity and insulation. £2.5m. The Modern House, 020 3795 5920