Hong Kong-based property developer Chinese Estates Holdings Ltd. is seeking redevelopment proposals for the London headquarters of Goldman Sachs Group Inc., which is slated to move out of the property in 2019, Bloomberg News reported, citing sources with knowledge of the plan.

Some developers have proposed a roughly 15% extension of the 430,000-square-foot River Court building in the City of London financial district.

The City of London Corp.'s planning department would prefer River Court to continue to operate as an office, the news outlet said, citing the sources, adding that a wholesale redevelopment for a much taller building would be impossible as the property is within the protected viewing corridor for St. Paul's Cathedral.

Chinese Estates was not immediately available for comment, while representatives of Cushman & Wakefield PLC and Savills PLC, who are advising on the project, declined to comment, the news outlet added.