The Richard Rogers Partnership (RRP) is refusing to confirm that Rogers has settled out of court with Marco Goldschmied over the future of the practice's Riverside premises in Hammersmith.
It has been reported that the row, in which Goldschmied was suing the practice, has been brought to an end, a move that will avoid an embarrassing High Court battle.
But officials at RRP have refused to comment on whether a deal has been formally agreed.
The row was over the value of the land occupied by the Rogers head office on the Thames.
The owner of the land is the RRP Pension Fund, to which the practice pays rent. Goldschmied, who is one of three recipients of the RRP pension fund, is understood to have argued that the rent should be a lot higher.
Rogers and Goldschied fell out over leadership of the practice in 2004 and Goldschmied walked away from the firm that he had co-led for over 30 years.
Goldschmied was also unavailable to confirm details of any deal. by Ed Dorrell