The RIBA has announced the shortlist for its most prestigious accolade, the Stirling Prize. Six projects are battling it out for the crown of 2013's best new building - announced in September.

Among them are: Shefield's Park Hill (Phase 1) redesign by Hawkins\Brown with Studio Egret West; the Newhall Be housing development in Essex by Alison Brooks Architects; a new holiday home by Witherford Watson Mann Architects, created from the ruins of the 12th century Astley Castle; the Bishop Edward King Chapel by Niall McLaughlin Architects; the monumental Giant's Causeway Visitor Centre in Northern Ireland by Heneghan Peng Architects; and the University of Limerick Medical School and student housing by Grafton Architects.

With a shortlist made of practices mostly new to the award - five out of six have been nominated for the first time - and with buildings noticeably varied in size and program, touching on themes of housing, reuse, conservation and craftsmanship, the competition is set to be fierce. Previous winners have included the Sainsbury Laboratory by Stanton Williams (2012) and the Evelyn Grace Academy by Zaha Hadid (2011).

The winning design, judged by architects Stephen Hodder, Sheila O'Donnell and Paul Williams, philanthropist and Chair of the Clore Duffield Foundation Dame Vivien Duffield and journalist Tom Dyckhoff, will be selected for its design excellence and architectural significance. The announcement will be made on the evening of 26 September. 

TAGS: RIBA, ARCHITECTURE AWARDS AND PRIZES