DEXUS Property Group is believed to have found a buyer for its 343 George Street office building, in the Sydney CBD.

A private investor is understood to be in exclusive due diligence to buy the heritage listed 11-storey building for more than $50 million. The negotiation may explain why a public campaign to sell the ASX building at 20 Bridge Street, has been delayed two weeks. That building was expected to sell for about $170 million.