Green Building Store (GBS) offers products and support for energy efficient homes and buildings. Founded in 1995, GBS has been at the at the forefront of sustainable, low energy building, offering product innovations and services to helping to support the uptake of Passivhaus in the UK. GBS offers a wide range of products and services, including triple glazed timber and alu-clad windows and doors, advanced MVHR heat recovery ventilation, specialist airtightness and insulation products, as well as consultancy and building services. A strong proponent of Passivhaus design, GBS offers a comprehensive range of Passivhaus products and services for the UK, and its in-house building team have constructed numerous Passivhaus buildings including the pioneering Denby Dale Passivhaus, Golcar Passivhaus and Stirley Farm EnerPHit projects. It has offices in Huddersfield and Gillingham. Green Building Store is an Efficient Building Solutions (EBS) business. EBS acquired GBS in 2020.