Home Postcodes by state QLD 4518 Postcode 4518 4518 is the postcode for Glass House Mountains, QLD. Localities with postcode 4518Glass House MountainsQLD Postcode 4518 State or territory Queensland (QLD) Localities 1 Council area Sunshine Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4517 · Postcode 4519