Barclays has agreed the contract with Interior Services Group to install its new 30,000 sq ft office in Allied London's central Manchester scheme at a price of £2.4m.
ISG will carry out a fast track fit-out of the ground and first floor of 3 Hardman Street, delivering a high specification cellular office layout.
Barclays is consolidating five business units from different sites around the city.
ISG will create a trading room and corporate reception area, as well as a range of meeting rooms, glazed partition offices and break out areas.
The project is due to commence by mid-August, with completion scheduled for the end of November this year.