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McAlpine and Mace among contractors behind RIBA Stirling Prize shortlist

The six projects shortlisted for the RIBA Stirling Prize 2025 (clockwise, left to right): Appleby Blue Almshouse (© Philip Vile); London College of Fashion (© Simon Menges); Elizabeth Tower; Hastings House (© Rory Gaylor); Niwa House (© Anton Gorlenko); The Discovery Centre (DISC) (© Hufton+Crow)
The six projects shortlisted for the RIBA Stirling Prize 2025 (clockwise from top left): Appleby Blue Almshouse (© Philip Vile); London College of Fashion (© Simon Menges); Elizabeth Tower; Hastings House (© Rory Gaylor); Niwa House (© Anton Gorlenko); The Discovery Centre (DISC) (© Hufton+Crow)

Sir Robert McAlpine and Mace are two of the contractors that built three projects shortlisted in this year’s Royal Institute of British Architects (RIBA) Stirling Prize.

The six projects in the running for the UK’s highest accolade in architecture include Big Ben’s restoration, the new home for the London College of Fashion, and pharma giant AstraZeneca’s new global research and development facility.

The full shortlist is:

Elizabeth Tower by Purcell

Client: Strategic Estates/UK Parliament
Contractor: Sir Robert McAlpine
Architect, lead designer, principal designer: Purcell

Appleby Blue Almshouse by Witherford Watson Mann Architects

Client: United St Saviour’s Charity
Contractor JTRE London

Hastings House by Hugh Strange Architects

Client: Private
Structural engineer: Price & Myers
Environmental/M&E engineer: Ritchie and Daffin

London College of Fashion by Allies and Morrison

Client: University of the Arts London and London Legacy Development Corporation
Contractor: Mace

Niwa House by Takero Shimazaki Architects

Client: Private
Contractor: New Wave London

The Discovery Centre (DISC) by Herzog and de Meuron / BDP

Client: AstraZeneca
Contractor: Mace

RIBA president, Chris Williamson, said: “These projects demonstrate architecture’s unique ability to address some of the most urgent challenges of our time, responding with creativity, adaptability and care.

“Together, these projects offer a hopeful vision for the future, one where architecture strengthens communities and helps shape a more sustainable and inclusive built environment.”

The winning project will be announced at London’s Roundhouse on 16 October.

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