Dual Occupancy and Duplex Planning
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Service
Dual Occupancy and Duplex Planning
From the first site check to the SEE and subdivision, we plan duplexes that fit the block and pass the council.
Dual occupancy is the most common small development in NSW and the one with the most traps. Minimum lot size, frontage, the difference between attached and detached, whether Torrens title subdivision is allowed, and whether the site qualifies for complying development under the Low Rise Housing Diversity Code all decide the outcome before a line is drawn.
URBA works with owners, builders and designers on duplex projects from the first site check through to the SEE, the subdivision application and any Clause 4.6 request. Since 1 July 2024 dual occupancies are permissible in R2 zones across most of NSW, but the lot size and DCP controls of each council still shape what is achievable.
Who this is for
- Owners replacing an older house with two dwellings
- Investors buying a block to build and hold or sell
- Builders needing the planning package for a client
- Designers wanting a planner on the team
What the report or service includes
- Site check: zone, minimum lot size for dual occupancy, frontage, constraints
- Pathway advice: DA with council or CDC under the Low Rise Housing Diversity Code
- Statement of Environmental Effects with LEP and DCP compliance tables
- Clause 4.6 request where a standard such as lot size or FSR is varied
- Torrens or strata subdivision application, concurrent or later
- Coordination with survey, stormwater, BASIX and landscape consultants
How it works
Step
Site check
We confirm permissibility and the numbers that matter before you spend on design.
Step
Design review
Concept plans checked against the DCP so the design lands inside the controls.
Step
Reports
SEE and any supporting planning documents, council-ready.
Step
Lodgement and follow-up
Planning Portal submission support and responses to any council request.
Frequently asked questions
What is the minimum lot size for a duplex in NSW?
It varies by council and is set in the LEP, often between 450 and 700 square metres for an attached dual occupancy, with larger minimums for detached forms and different figures again for CDC under the Low Rise Housing Diversity Code. We check the exact figure for your site as the first step.
Can I subdivide a duplex into two titles?
Often, but not always. Some LEPs allow Torrens title subdivision of dual occupancies only where each resulting lot meets a minimum area; others permit strata only. The answer sits in the LEP subdivision clauses and we confirm it in writing.
Is a duplex faster through CDC or DA?
CDC is usually faster if the site and design meet every standard in the code. If any standard is missed, DA is the only route. We assess both before recommending one.
Where we provide this service
Across Sydney, Western Sydney, the Central Coast, the Hunter, the Illawarra and regional NSW. See the areas we service for council-specific notes, including Blacktown, Penrith, The Hills, Liverpool, Camden and the Central Coast.
Related
Services that often go with this one
Reading
Guides related to dual occupancy and duplex
Dual occupancy in R2 zones across NSW: the July 2024 rule change
On 1 July 2024 dual occupancies became permissible in every NSW R2 zone. What changed, what did not, and how Sydney councils assess duplex…
7 min read
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SEE for a dual occupancy: the sections councils read first
Which sections of a dual occupancy Statement of Environmental Effects Sydney council planners read first, and what each must contain to avoid an RFI.
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Next step
Get a fixed fee for dual occupancy and duplex
Send the address and your plans or concept. A URBA planner will confirm the pathway and send a fixed-fee proposal, usually within one business day.