Sydney's councils need expert guidance when deciding whether to approve major residential blocks lest they be overrun by proposed architectural monstrosities, Sydney's business lobbies have warned.

David Borger, a long-serving minister for housing and Western Sydney and now president of the Western Sydney Business Chamber, wants the state government to mandate the use of "design excellence panels" to improve the standard of architecture by guiding council decisions.

"Change the development culture": Western Sydney Business Chamber president David Borger. Credit:Geoff Jones

Mr Borger is lobbying the state government to make use of a single panel for the planned massive development of an area around Parramatta Road.

The state government has released plans for adding 40,000 dwellings in the vicinity of the traffic corridor – which traverses 10 Sydney councils.