Sharrow School, with its living roof designed by the University of Sheffield's Nigel Dunnett, and Hackfall Woods have been shortlisted in the Royal Institute of British Architects (RIBA) Yorkshire White Rose Awards.
The winning project is to be announced this evening (Friday) at Leeds Town Hall.
The restoration of Hackfall Woods was carried out by RHS Gardens' master-planning firm The Landscape Agency.
The six-year project to restore the Grade I-registered woodland gardens to their former glory was completed in the spring following work from conservation architects, landscape historians, hydrologists and ecologists.
The entry for Sharrow Primary School was submitted by Sheffield City Council's design and project management team, which worked on the scheme that included a 2,000sq m green roof.
The new landscape architecture award has been launched by RIBA Yorkshire and the Landscape Institute Yorkshire and Humber branch, and will be given to the scheme that best demonstrates excellent design principles.