A four-story addition using similar materials was added to the north of the original building in 1962.

Public Works undertook extensive interior renovations to convert the building to general office use, which included the installation of a glass atrium over the former light court of the 4th-7th floors to create more contiguous space.

These included complete removal, cleaning, and restoration of the sandstone exterior and repairs to the underlying steel frame.

The tower restoration also included the installation of a new copper dome similar to the original.

Notable heritage features include the stone structure, the large stone seahorses at the roof level and in the main lobby, the remaining brass postal wickets and the lobby's marble floors and dedication to Edward VIII.