Dual Occupancy vs Duplex in NSW 2026: Which Development Pathway is Right for Your Block? Dual Occupancy vs Duplex in NSW 2026: Which Development Pathway is Right for Your Block? Author: Franz Phan, Senior Planning Consultant, giantA Pty Ltd Published: July 17, 2026 Reading time: 12 minute... DA approval Development Application NSW Planning NSW building regulations Residential Projects Secondary Dwelling cdc-approval da-application da-approval duplex greater-sydney multi-residential nsw-building-compliance nsw-planning residential-projects sydney western-sydney Jul 16, 2026