Duplex & Dual Occupancy Design
Duplex Design & Planning in Sydney & Western Sydney
A well-designed duplex maximises site potential, rental yield and resale value. Trinity Design & Planning specialises in duplex design for clients across Fairfield West, Smithfield, Wetherill Park, Bossley Park, Liverpool and surrounding areas.
Our duplex designs are tailored to both your goals and NSW planning requirements, ensuring approvals run smoothly and construction remains efficient.
Why Duplexes Are Popular in Western Sydney
Strong rental demand
Multi-generational living
Ability to sell one and keep the other
Efficient use of medium-sized blocks
CDC suitability in many suburbs
Our Duplex Design Services Include:
Site Feasibility & Yield Assessment
We assess minimum lot widths, setbacks, parking, private open space, building envelopes and stormwater constraints.
Concept Duplex Layouts
We explore different arrangements such as mirror layouts or front/back configurations.
Full Architectural Drawings
Floor plans
Elevations
Sections
Roof plan
Driveway and parking layout
Private open space design
DA or CDC Preparation
We determine the best approval pathway for your site.
CDC is often possible in suburbs like: Fairfield West, Blacktown, Smithfield, Wetherill Park
(depending on zoning and lot size).
BASIX, SEE, Shadow Diagrams & More
All supporting documentation is available in-house.
Designed for Practical Construction
Duplex projects must be cost-efficient. Our plans emphasise:
Straight load-bearing walls
Logical plumbing runs
Minimised structural complexity
Buildability for Western Sydney builders
This reduces unexpected costs during construction.
Local Council Knowledge Gives You an Advantage
We regularly prepare duplex designs for:
Fairfield Council
Liverpool Council
Cumberland Council
Blacktown City Council
We understand parking requirements, private open space ratios, maximum wall heights, articulation zones, and other duplex-specific rules.
Start Your Duplex Project Today
We help investors, homeowners and developers unlock their site’s full potential.