Century 21 Advance Realty is Western Australia’s Largest and Award Winning Regional Office. We got this way because we listen – Listen to Sellers. Listen to Buyers. Listen to Investors. We listen to everyone who has a problem with real estate that needs solving.When it comes to real estate for sale in Western Australia our team specialises in properties found in the South West, Commercial Properties, Consulting, Retail properties for sale and Major Special Projects.