The Brockholes Wetland and Woodland Nature Reserve is part of the wider £59 million Newlands land regeneration scheme - Britain's largest ever environmental programme.
According to the brief the scheme will have to 'aspire to be a carbon-neutral construction, drawing on local resources where possible'.
Entrants will be judged anonymously in the first stage, then a shortlist of five will be decided and will be invited to present their designs to a jury panel.
For further information on how to enter please telephone the RIBA Competitions Office on 0113 2341335 or visit www.architecture.com/competitions. The submission deadline is Wednesday 19 September 2007.