Acoustic and Separation Requirements for Multi-Unit Dwellings (Class 2) in NSW: A 2026 Compliance Guide !DOCTYPE html> Acoustic and Separation Requirements for Multi-Unit Dwellings (Class 2) in NSW: A 2026 Compliance Guide Acoustic and Separation Requirements for Multi-Unit Dwellings (Class 2) in NSW: A... acoustic-separation apartment-design class-2-building design-practitioner multi-residential ncc-2022 nsw-building-compliance Aug 3, 2026