greenwoods-valley postcode wa Home ›› Postcode Finder ›› WA ›› Greenwoods-Valley Greenwoods Valley local listingsThe suburb of Greenwoods Valley is located in WA and has a postcode of 6405. Free greenwoods valley business listing! Get the first free listing in greenwoods valley! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.