Consultation opened into the St George development at Dickens Yard, Ealing, yesterday.
The developer plans to transform the land behind the Town Hall in Ealing Broadway into a residential and shopping complex.
The developer wants permission to knock down the old Town Hall annex and replace it with seven new buildings, including a 15-storey tower, providing 697 housing units, plus 9,040 square metres of shopping space.
The consultation is scheduled to finish on Friday, June 27.