Zaha Hadid’s Evelyn Grace Academy in London has won the 2011 Stirling Prize.

The winner of the £20,000 prize was announced at a ceremony at the Magna Science and Adventure Centre in Rotherham, Sheffield, which will be broadcast on BBC2’s The Culture Show.

Hadid beat five other nominated entries, including the Velodrome by Hopkins Architects and the Folkwang Museum by David Chipperfield, but was not present to collect the award which was picked up by her business partner Patrik Schumacher.

It is the second year in a row that Hadid has won the prize, having triumphed last year with the MAXXI Museum in Rome, and it is the first time that a school building has been awarded the Stirling.

The Lubetkin Prize was awarded to WOHA, the Singaporean practice founded by Wong Mun Summ & Richard Hassell, for the Met residential skyscraper in Bangkok, Thailand.

The Stephen Lawrence prize was awarded to the St. Patrick’s School Library and Music Room in north-west London by Coffey Architects.

This year’s judges were Angela Brady, RIBA President (chair); Sir Peter Cook, architect and academic, formerly of Royal Gold Medal winning Achigram; Hanif Kara,  engineer, Adams Kara Taylor; Dan Pearson, landscape designer and RIBA Honorary Fellow; and architect Alison Brooks.

Speaking at the ceremony Brady said: “The Evelyn Grace Academy is an exceptional example of what can be achieved when we invest carefully in a well-designed new school building. The result - a highly imaginative, exciting Academy that shows the students, staff and local residents that they are valued - is what every school should and could be.”