The revised design plans for St John's Wood Barracks in north London received approval by the local council.
The plans have been reworked by John McAslan & Partners and are being delivered for Westminster City Council.
The site, currently housing the King's Troop, will be turned into 133 homes and the Grade II-listed riding school building will be converted into a private leisure centre.
The previous plan by the practice was rejected by the council after it received opposition, according to bdonline.co.uk.
Conservation practice Russell Taylor Architects was asked to rework the proposals, which included reducing the number of homes and height of buildings on the site.