The answer is Baldivis!
Baldivis has been the No.1 First Home Owner Grant suburb for the last 5 years. In the last financial year (2014/15) there were 704 First Home Owner Grants paid to first home buyers who built or bought a home in Baldivis,
Byford came in at No.2 which knocked Ellenbrook down to no.3. ellenbrook has previously held the No.2 spot since 2011/12.