The article discusses how using 3D laser scanning to create accurate models of existing water facilities can save time and money, and improve performance and asset management. By capturing the real conditions of buildings, the shift from 'as-designed' to 'as-constructed' BIM models can be beneficial for facility operations. The study at a water treatment plant in Australia shows that scan-to-BIM can help stakeholders manage assets effectively. Different levels of detail and information in BIM models can impact their usefulness for specific projects. The paper provides a framework for water asset owners to get value from investing in scan-to-BIM for existing facilities.