The first bricks are set to be laid in a neighbourhood built entirely for first home buyers.
The Australia-first initiative will see 400 new homes allocated to a pocket in Adelaide's north specifically for those buying their first home.
South Australian Premier Peter Malinauskas said the state had the fastest-growing economy and fastest housing growth in the nation.
"In this week's state budget, we'll be allocating an additional $50 million to accelerate delivery of 400 extra new homes that will be exclusively available to first home buyers only," Mr Malinauskas told reporters on Sunday.
"This will be the nation's first-ever first home buyer neighbourhood."
The pre-budget announcement comes ahead of the state Labor government unveiling its fiscal blueprint on Thursday, its first since being returned to power in a landslide result in March.
