RIBA Stirling Prize is a annual industry award recognizing excellence in Real-Estate. Organized by Royal Institute of British Architects (RIBA), it covers the Europe region. Established in 1996.
The RIBA Stirling Prize is the Royal Institute of British Architects' award for the UK's best new building, presented since 1996 and named after architect James Stirling. It sits at the top of the RIBA Awards pyramid: practices enter the RIBA UK Awards (or RIAS Awards in Scotland), winners progress to RIBA National Awards, and the Stirling shortlist of six is drawn from those National Award winners. Judging is unusually rigorous — no RIBA award is given unless the project has been visited in person by a jury of award-winning architects and lay assessors, and the final Stirling jury is chaired by the RIBA President.
The ladder of recognition — RIBA Regional Award, RIBA National Award, Stirling shortlist, Stirling winner — means even mid-tier success carries real professional weight in the UK market. The winner is announced live each October (the 2026 winner at London's Old Billingsgate on 15 October), with heavy national press coverage; shortlisting alone is among the most CV-worthy distinctions available to a UK practice, and shortlisted buildings are assessed on design vision, innovation, sustainability, accessibility and client satisfaction.
To enter, the project director must be a current RIBA, RSAW, RIAS or RSUA Chartered Member or RIBA International Fellow, and the project must be located in the UK, completed and occupied within the eligibility window, with the client's permission. Entry fees for the 2026 cycle ranged from £99 to £909 (excl. VAT), banded by construction cost, with discounted or free entry available for practices without the resources. Entries open mid-October and close in early December (the 2027 cycle opens 16 October 2026). Budget time for the now-mandatory sustainability data — actual energy use, water usage and embodied carbon, with whole-life carbon required for Stirling consideration — so gather post-occupancy figures well before the deadline.