AHMM’s revised plans to upgrade Denys Lasdun’s IBM building on London’s South Bank have been approved by Lambeth council.

The practice’s original proposals for the office complex, completed in 1983, were floated early last year and envisaged the creation of an extra 20,000sq m of space through the addition of two new storeys.

But the scheme for Wolfe Commercial Properties Southbank – owned by the United Arab Emirates-based Easa Saleh Al Gurg Group – was drawn up before the building was given a grade II listing last year, in part for its “architectural concordance” with the neighbouring National Theatre, also designed by Lasdun.

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