A total of 215 schemes were entered for the London awards, up by 30 from last year.
All the shortlisted schemes will by visited by a jury throughout April, with the winner announced at an awards ceremony at the RIBA, 66 Portland Place, on 22 May.
Regional winners will then be put forward for the RIBA National Awards, with the successful recipients announced in July. Those collecting national awards will then be considered for the RIBA Stirling Prize.