The nine-storey building in Manchester city centre is almost fully let with Towergate Insurance committing to an additional 8,300 sq ft.
The Towergate deal is on the fifth floor for £33.50/sq ft.
This is in addition to 36,000 sq ft on the third floor for its customer contact centre which Towergate has occupied since 2015.
Royal London Asset Management, which owns the building, has also secured an additional five years from law firm TLT with the removal of a break clause in its rental agreement for 22,000 sq ft on the seventh floor.
With these commitments, 3 Hardman Square is now almost fully let. There is 22,000 sq ft remaining on the fourth floor available at £33.50/sq ft. Other tenants include the General Medical Council and WorldPay.
3 Hardman Square has undergone improvements in recent months, including the introduction of a ground and mezzanine level reception with private booths and amenities. All improvements are due for completion this month.
The deals were jointly brokered by Colliers International and CBRE.
Scott Shufflebottom, associate director of national offices at Colliers in Manchester, said: “Towergate taking new space and TLT committing to extend its occupation at 3 Hardman Square are testament to the appeal and status of 3 Hardman Square and RLAM’s commitment to continuous building improvements.
“Swiftly following the cycle hub, the introduction of the new reception amenity will be a great addition for existing occupiers but also prospective occupiers seeking to acquire the last remaining, newly refurbished floor.”