A planning application has been submitted for a 270,000 sq ft office in Quay Street, Manchester, opposite Allied London's No 1 Spinningfields tower.
The scheme from West Midlands Pension Fund, advised by CBRE Global Investors, would see the demolition of Astley House and Byrom House, two 1960s interlinked offices next to St John's Gardens.
Designed by Stride Treglown, the block would range from 14 storeys next to Lower Byrom Street, to six storeys closer to Byrom Street.
The plans were first announced in September 2013, when WMPF began a consultation process and entered into pre-planning application talks with the council.
Opposite Astley House and Byrom House, Allied London is developing a 340,000 sq ft office designed by SimpsonHaugh & Partners on the site of Quay House. Demolition works are currently underway and the building is due to be completed in 2016.
CBRE Global Investors is advised by Colliers International.