NSW Labor leader Michael Daley will direct the Greater Sydney Commission to revise "unfair" housing supply targets across the city if he's elected premier.

Labor claims Western Sydney is bearing the brunt of "rampant" residential development while blue ribbon suburbs are favoured with lenient development

"It's not fair to exempt some areas from taking on their fair share while allowing other communities to get clobbered," Mr Daley said in a release on Saturday.