Built in the 1960s, this remarkable single-storey house lies in a leafy plot on the fringes of Welwyn, Hertfordshire. It was designed by the architect Ralph Baldwin as his own home and has been sympathetically updated by subsequent owners. Configured in an open-plan layout, the house is characterised by its wealth of preserved mid-century features, including boarded ceilings, floating walls and a liberal use of glazing. Inside is seamlessly integrated with a private, half-acre garden; there is also a garage/workshop and a self-contained one-bedroom annexe.