If you’ve been thinking about building a duplex or semi-detached home in Sydney, recent changes to the State Environmental Planning Policy (Housing) 2021 have made the process significantly easier.
On February 28, 2025, the NSW Government removed Chapter 6, Part 2, effectively allowing dual occupancies in R2 Low-Density Residential Zones across the state. This means more flexibility for homeowners and investors looking to build in well-established suburbs.
Key Changes in the Policy
The new policy introduces standardised requirements for dual occupancy developments, reducing red tape and uncertainty for builders and developers. Here’s a breakdown:
✅ Dual occupancies & semi-detached dwellings are now permitted in R2 zones
📏 Minimum lot size: 450m² with a 12m frontage
🚗 Minimum parking: At least 1 car space per dwelling
📐 Subdivision rules:
Minimum 225m² per lot
Minimum 6m frontage per lot
No battle-axe subdivisions
🌳 Landscaping requirements: Must comply with the Tree Canopy Guide for Low & Mid-Rise Housing
Why this is good news if you’re considering building a Duplex?
These changes make Sydney’s growing suburbs more accessible for those looking to build or invest in well-located housing. The new rules hope to achieve:
🔹 Make duplex approvals easier – clear guidelines mean fewer delays
🔹 Create more housing supply – increasing availability in key growth areas
🔹 Offer new investment opportunities – a great way to maximise your land’s potential
Is a Duplex Right for You?
A duplex offers:
🏡 Flexible living – live in one, rent the other
💰 Stronger returns – increased rental yield & resale value
📍 Prime locations – build in well-connected suburbs near transport & amenities
At King Homes NSW, we specialise in custom duplex designs that fit Sydney’s new planning rules. Whether you’re looking for a dual occupancy investment or a modern family home, we can guide you through the process.
