If you are looking for a Passivhaus builder or eco house builder in London and the South East, Path-50 builds bespoke, high-performance homes in London, Surrey, Berkshire, Buckinghamshire, Hertfordshire and Oxfordshire. Our fabric-first approach treats the house as a complete system, with insulation, airtightness, thermal bridging, ventilation and building services planned together. We manage and coordinate the design, engineering and construction process, so one team looks after the whole project.