Barclays is set to leave its landmark building in Poole, after 46 years in the town and being one of the town’s biggest employers for decades.
The closure would cause over 700 permanent roles to be impacted.
A large majority of the banks staff are being moved to the Bournemouth Lansdowne area.
A Barclays spokesperson said: “In order to drive greater collaboration between teams, Barclays has announced it plans to exit Barclays House, Wimborne Road, Poole, by the end of the year.
“The announcement will see the majority of colleagues being relocated to new office premises at The Helm, Holdenhurst Road, Bournemouth continuing the bank’s longstanding commitment as a major employer in the region.
“Other roles will be relocated bringing teams closer together helping to drive future collaboration at our UK sites including Glasgow, Greater Manchester and Northampton; where we have invested in new campuses and office space.
“These changes enable us to innovate at pace for the customers and clients we serve.”
They continue: “We will do everything we can to support colleagues impacted by the changes announced, including supporting redeployment where possible and working closely with Unite.
“As yet, no decision has been made with regard to the future or disposal of Barclays House.”
More updates to follow.