Energy World was a demonstration project of 51 low-energy houses constructed in the Shenley Lodge area of Milton Keynes, United Kingdom. The project was promoted by the Milton Keynes Development Corporation and culminated in a public exhibition in August and October 1986 that attracted international interest. It was a significant landmark in the design and construction of low-energy housing, and in the development of energy efficiency evaluation tools. It has had a long-term impact on Government policy and within the national house-building industry, insofar as the progressive 'tightening up' of the energy section of the Building Regulations has largely been founded on this pioneering work.
The houses were designed to be at least 30% more efficient than the Building Regulations then in force. The architecture and technologies used was very varied, and included designs from Canada (the first R-2000 house in the UK), Denmark, Finland, Germany, and Sweden. Although it was later removed, the exhibition also featured a wind turbine, then an uncommon sight.