The works consist of the remodelling of the nine-storey, Grade II-listed building, adjacent to London Bridge to a Category A office standard.
Originally completed in 1924 on the site of the original London Bridge, Adelaide House was London’s first steel frame building, and at the time of construction was the tallest office building in the City.
The design drawn up by Scott Brownrigg will also involve reconfiguration and enhancement works to external areas including the roof and riverside gardens.
Bill Hocking, Chief Executive of Galliford Try, said: “We are delighted to be working with St Martin’s on this landmark building with a prestigious location on the banks of the Thames.
“Our Building team has a proud record of delivering high-quality, sustainable office spaces within the capital.”