The champion teams of the NBL1 West, formerly the State Basketball League (SBL), are determined annually by a grand final weekend hosted by Basketball Western Australia. All grand finals have been played in a one-game championship decider, except in 1995 when a best-of-three series was used. In 2010, the WA Basketball Centre hosted the grand finals for the first time. In 2024, the grand final host venue shifted to Perth Arena.