The State Environmental Planning Policy (Affordable Rental Housing) 2009, or ARHSEPP, was introduced on 31 July 2009 to increase the supply and diversity of affordable rental and social housing in NSW.

It covers housing types including villas, townhouses and apartments which contain an affordable rental housing component, along with secondary dwellings (also known as granny flats), new generation boarding houses, group homes, social housing and supportive accommodation.