Ashden, the national green energy charity, is seeking entries for its 2014 Awards.
Now in their 14th year, the Ashden Awards identify the most exciting green building pioneers from across the UK.
Entry to the Awards is free and winners will receive an award worth up to £20,000 at a prestigious ceremony at the Royal Geographical Society in London on 22 May 2014.
Ashden is particularly interested in businesses, housing associations and public sector organisations that are helping to retrofit existing housing stock, designing energy efficient buildings, changing residents' behaviour and developing skills in installing renewable energy and energy efficiency technologies.
In addition to prize money, Ashden offers winners a package of benefits and tailored support designed to help them scale up; a platform to promote their work through events and media coverage; short films about their work and introductions to potential funders and investors.
The deadline for entries is 5 November.