Sustainabilty WA 6 Star Energy Rating Specialist Home ›› Local Listings ›› WA ›› Perth ›› Sustainabilty WA 6 Star Energy Rating Specialist WA Real Estate Perth, WA 6173 Nathan(08) 9537 2000https://www.sustainabilitywa.com.au Sustainabilty WA in Perth Western Australia is Australia's leading energy efficiency assessors and energy report consultants. A 6 Star energy rating specialist providing cost effective energy ratings and energy reports based on the deemed to satisfy and verification or star method reporting.