Five contractors are bidding for the £2.75m Gifto Properties scheme on Southall High Street.
The Robinson Francis Partnership designed project has planning permisson, and involves construction of a part four, five and six storey building with two ground floor retail units, and with 24 flats on the upper floors.
The bidders are thought to be Ashe Construction, Bell Projects, ROKBUILD, Ibex Interiors and Kier Partnership.