grandchester postcode qld Home ›› Postcode Finder ›› QLD ›› Grandchester Grandchester local listingsThe suburb of Grandchester is located in QLD and has a postcode of 4340. Free grandchester business listing! 1Grandchester State SchoolSchool Rd 07 546552612Spicers Hidden Vale617 Grandchester Mount Mort Rd 1300 179 340 View more business listings in grandchester Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.