Bruntwood is close to buying 69,000 sq ft of the Edward Pavilion at Liverpool's Albert Dock for £12m in a sale and leaseback from insurer Swiss Re.
The deal would be the third acquisition in Liverpool by Bruntwood this year following Number 1 Dale Street and Cotton Exchange and Cotton House.
The Edward Pavilion, part of the famous Grade I-listed former warehouse complex designed by Victorian engineer-architect Jesse Hartley, would be Bruntwood's tenth property in Liverpool and Merseyside.
The Merseyside portfolio, dominated by The Plaza on Old Hall Street, would total 950,000 sq ft if the deal is completed.
The Albert Dock freehold is owned by Arrowcroft and Swiss Re held the Edward Pavilion on long leasehold for 150 years. The offices are over basement, ground floor reception and five upper floors.
Keppie Massie is acting for Swiss Re. Bruntwood advises itself. All parties declined to comment.