The firm was set-up two years ago by former Barratt London regional chairman Adam Lawrence.
It bought the site at 113 Upper Richmond Road as part of ambitious plans to reach a target of building over 600 new homes annually within the next five years.
Lawrence, chief executive of London Square, said: “London Square Putney is an outstanding new scheme. We now have a total of nine prime sites underway across the capital.”
Architect Allford Hall Monaghan Morris has designed a 12-storey brick-clad building which has just received full planning permission.
The development will be fuelled by a CHP plant and its residential units will achieve the Code for Sustainable Homes level 4 rating, whilst the commercial spaces have been designed to obtain BREEAM Excellent certification.