WA’s Planning and Lands Minister John Carey has announced sweeping proposed reforms to the Residential Design Codes (R-Codes) — the…
If you’re weighing up a subdivision project, the first question you’re almost certainly asking is: what does it actually cost? The cost of subdividing land in Perth varies block by block, but with the right numbers in front of you, it’s possible to budget with real confidence before you commit.
This guide walks through current Perth subdivision costs, the full subdivision process in WA, the R-Codes that determine what you can build, and everything else you need to understand the subdivision of land in Western Australia.
Before we begin, it’s worth noting that while you’ll find a lot of what you need to know online, there’s no substitute for talking to a professional who can guide you through the process. At Summit Developments, we’ve helped 1000’s of WA families and individuals become successful property developers. Reach out to our experienced developments team for a free, no-obligation consultation.
Page Contents
1.0 What is Subdivision
1.1 The Subdivision Process in WA
1.2 Is Subdividing Land the Right Development Pathway for Your Property?
1.3 Is Your Block Suitable for a Strata or Green Title Subdivision?
2.0 How Much Does It Cost to Subdivide Land in Perth?
2.1 What Does it Cost to Build on Your New Lot?
3.0 Understanding Zoning and R Codes
3.1 What is the Minimum Land Size for Subdivision in WA?
3.2 How Do You Check the Zoning of Your Property in WA?
3.3 Different Ways to Subdivide Your Land
4.0 Ready to Start a Subdivision Project?
4.1 Further Resources
1.0 What is a Subdivision?
If the term “subdivision” is new to you, put simply: subdivision is the legal process of creating separate land titles from a property that originally accommodated a single residence, opening the potential for multiple properties on that block. The subdivision of land is one of the most accessible forms of property development in Perth, because in many cases you’re working with land you already own.
1.1 The Subdivision Process in Western Australia
Subdividing land can be highly profitable, and the whole process can take under a year. Without any construction of dwellings included, you could complete a subdivision in around 12 months for your property in WA. If you want to include construction, you’re looking at a total timeline of 18+ months.
In Western Australia, the process comes down to six key steps:
- Initial Consultation and Research (1-3 months) Familiarise yourself with the Western Australian Planning Commission’s (WAPC) guidelines and requirements. The WAPC is the primary statutory body overseeing subdivision in WA, and every subdivision application must be submitted to it for review and approval. Engaging a subdivision consultant or town planner early gives you expert advice on local regulations and best practice.
- Site Planning and Demarcation (2-4 months) Work with a licensed land surveyor to develop a detailed survey plan specifying dimensions and boundaries, and clearly demarcate the new lot boundaries for each subdivided lot.
- Application Submission (3 months) Prepare and lodge your application with the WAPC via the Planning Online portal, then obtain conditional approval, noting any requirements set by the WAPC or your local council.
- Addressing Specific Conditions and Seeking Clearances (6–9 months) Ensure compliance with all conditions stipulated by the WAPC, including street access for each new lot and any implications for a retained dwelling. This stage includes having services installed, including the Western Power connection (dome). Dome installation timing is the item most likely to affect your overall project schedule, and it’s worth planning for upfront rather than being caught out partway through — get your application in as early as possible in the process.
- Title Formalities (2-4 months) Secure separate land titles for each subdivided plot through Landgate, ensuring individual ownership rights once all conditions and planning requirements have been met.
- Construction Phase (12-24 months, if applicable) Begin dwelling construction, turning the new plots into habitable spaces.
1.2 Is Subdividing Land the Right Development Pathway for Your Property?
Before choosing to subdivide, it’s vital to run a feasibility study and ask the right questions. Is there genuine demand for housing in the local area? What kind of housing resonates with future residents?
Subdividing where you currently live can be a smart move if the existing house sits in an established area that’s attractive to future homeowners. However, a subdivided block isn’t always going to sell well in areas with an abundance of vacant land already available.
Summit Developments offers innovative designs tailored for backyard subdivisions, giving you the option to lease or live in the newly constructed home — especially attractive if you’re not interested in maintaining a large backyard.
1.3 Is Your Block Suitable for a Strata or Green Title Subdivision?
Not every block is eligible for subdivision. Suitability for strata or green title subdivision depends on factors including land zoning, block dimensions, infrastructure, accessibility, economic feasibility, and local council policy.
2.0 How Much Does It Cost to Subdivide Land in Perth?
This is the question every prospective developer asks first, and for good reason — the cost of subdividing land is the number that decides whether a project stacks up. Total subdivision cost in WA is shaped by the number of new titles you’re creating, which is dependant your block’s R-Code, whether an existing dwelling is retained or demolished, site access and slope, and which utility connections are already available.
That said, for a standard two-lot Perth subdivision, most projects land somewhere in the $50,000 to $80,000 range, with straightforward sites sometimes coming in lower and more complex sites — steep blocks, overhead power that needs undergrounding, or extensive demolition — pushing beyond $100,000. Larger multi-lot subdivisions scale up significantly from there, with civil works and infrastructure on bigger sites often running into the hundreds of thousands of dollars.
Here’s a rough breakdown of where the money goes on a typical two-lot survey-strata subdivision in Perth (Please note these figures are indicative and only cover the cost of subdividing your land):
| Cost Item | Typical Range (2-lot subdivision) |
| Licensed surveyor & subdivision application/lodgement fees | ~$12,500 |
| WAPC subdivision application fee | Roughly $3,546 + $79 per lot, plus a final clearance fee (indexed annually — check current WAPC fees before budgeting) |
| Water Corporation headworks contribution | ~$7,000-$8,000 per additional lot |
| Western Power connection/contribution | ~$3,000 – $10,000, plus an application fee plus an application fee (varies significantly depending on existing connections in the street, whether a neighbouring dome can be upgraded rather than installed new, and dome placement on the lot) |
| New title application (Landgate) | ~$1,000 per lot (inc. GST) |
| NBN developer’s contribution | ~$600 per new lot, plus an application fee |
| Engineering reports | $2,000-$5,000 |
| Civil and Site works (sewer connection per lot, site main switchboard, power conduit runs) | ~$10,000 – $20,000 |
| Environmental assessments (where required) | $3,000-$10,000 |
| House demolition (if applicable) | ~$18,000-$20,000 (inc. GST and service disconnections) |
| Advertising the new lot(s) for sale | $1,000-$5,000 |
A few notes on these figures:
- WAPC fees increase periodically — including a scheduled increase from 1 July 2026 — so always confirm the current fee schedule directly with the WAPC or your subdivision consultant rather than relying on a fixed figure from any blog, including this one.
- Western Power and Water Corporation contributions vary significantly by site. Underground power, distance to the existing network, and whether reticulated sewer is already connected can all shift these subdivision costs meaningfully.
- Retaining the existing dwelling generally reduces costs (no demolition), while demolishing and starting fresh adds to the budget but can open up better lot configurations.
- If you’re doing a front-and-rear (battle-axe) subdivision rather than side-by-side, factor in additional costs for the common driveway — some local governments require it to be paved or concreted as a condition of approval — plus stormwater drainage to the common driveway.
- Green-titled subdivisions typically involve additional costs compared to survey-strata and should be budgeted separately with your consultant.
- These figures cover subdivision costs only — they don’t include the cost of building a new dwelling on the vacant lot, which is a separate budget line entirely.
Because so much of the total cost of subdividing land in WA depends on your specific block, the single most valuable step you can take before committing to a project is a proper feasibility assessment. Summit Developments offers a free, no-obligation consultation where we walk through your site-specific numbers rather than generic estimates.
2.1 What Does It Cost to Build on Your New Lot?
Subdividing gets you a new title — but for most Summit Developments clients, the real question is the combined cost of subdividing and building.
Build costs in Perth vary enormously depending on design, finish level, and site conditions, just like subdivision costs, there’s no single figure that applies to every project.
A few things that move the needle on your build cost:
- Site conditions: Reactive clay soils common in Perth’s southern and eastern suburbs can require upgraded engineered slabs and extensive site costs. Sandy soils (common in the northern corridor) are typically cheaper to build on.
- Storeys and footprint: Narrow or rear-lot subdivisions (like a battle-axe block) often suit a double-storey or narrow-lot design, which typically costs more per sqm than a single-storey build on a standard lot.
- What’s not included: Build quotes typically exclude landscaping, fencing, and utility connections — budget an additional $20,000-$100,000+ depending on scope. We include these in our costs
Putting it together: for a typical two-lot Perth subdivision, budgeting $50,000-$80,000 for the subdivision itself plus $400,000-$500,000+ for a mid-range build on the new lot gives a realistic total project range — though the only way to know your actual numbers is a site-specific assessment.
Because Summit Developments manages both the subdivision and the build, we can give you one accurate, combined budget from day one — rather than juggling a subdivision consultant and a separate builder’s quote. Get in touch for a free, no-obligation consultation covering your full subdivide-and-build cost.
3.0 Understanding Zoning and R-Codes
Zoning controls housing density, ensuring there’s enough higher-density housing closer to the city where demand is greatest. If you’re looking to buy land to subdivide, or subdivide a property you already own, your plans need to comply with WA’s Residential Design Codes (R-Codes). Land closer to the Perth CBD is commonly zoned R30 or R40 (higher density, smaller minimum block sizes), while land further from Perth is often R20, with a correspondingly larger minimum block size — all of which feeds directly into your likely subdivision cost, since more lots on smaller blocks typically means higher utility and civil works costs overall, even as the cost per lot falls.
The primary R-Code zonings you’ll encounter are R10, R12.5, R15, R20, R25, R30, R35, R40, R50, R60, R80, R100 and R160. Here are the most relevant ones for typical Perth subdivisions:
- R20: Low density, typically large-lot residential. Subject to change with the proposed changes to R20 requirements.
- R30: Medium density, suited to a mix of single houses, duplex, and grouped dwellings.
- R40: Medium-to-higher density, suitable for single houses, duplex, and small-scale multiple dwellings.
- R60: Higher density, catering to multi-unit dwellings like apartments and townhouses.
- R80: Higher density again, typically seen close to major amenities and public transport.
- R100: Very high density, usually reserved for inner-city locations or sites close to major transit hubs.
3.1 What is the Minimum Land Size for Subdivision in WA?
The minimum land size for a subdivision is the defined site area required per lot as defined under the specific R-Code.
R-20 Zoning Each subdivided block requires an average site area of 450sqm (with a minimum of 350sqm) To subdivide into two roughly equal blocks, you’d typically need a starting block of at least 900sqm. Subject to change with proposed amendments to the R Codes
R-30 Zoning Each subdivided block requires an average site area of 300sqm (minimum lot size 260sqm). A two-lot subdivision typically needs a starting block of at least 600sqm.
R-40 Zoning Each subdivided block requires an average site area of 220sqm (minimum lot size 180sqm). A two-lot subdivision typically needs a starting block of at least 440sqm.
Keep in mind local planning policies can vary these figures slightly, and a minor variation (often around 5%) on minimum or average lot size can sometimes be negotiated with your local council.
3.2 How Do You Check the Zoning of Your Property in WA?
Council zoning across Perth evolves over time, so R-Codes can change. There are two reliable ways to check your land’s current zoning:
- Use the Department of Planning’s Land Enquiry Tool The fastest way to find your land’s R-Code is via the WA Department of Planning’s land enquiry mapping tool. Click your property on the map to see everything relevant to its subdivision potential.
- Talk to a Professional Land Developer Whether you’re eyeing a backyard subdivision or a new block to subdivide, knowing what’s possible from the outset is vital. Engaging strata builders and home builders early helps you maximise your development — something as simple as a sewer connection can carry costly complications if it’s not identified early. At Summit Developments, our Development Consultants can advise on local council zoning and help determine what’s feasible for your subdivision.
3.3 Different Ways to Subdivide Your Land
There are several common approaches to subdivision in Perth: rear strata, duplex development, triplex development, narrow lot townhouses, grouped housing, and multi-unit or apartment developments.
Rear Strata (or Rear Lot): A new lot is created behind an existing property, typically accessed via a common driveway. The rear property is separately titled from the front property, allowing independent ownership. A classic example is the battle-axe block — named for its shape from above, with the driveway forming the “handle” and the larger portion of land at the rear forming the “blade.”
Duplex Development: A single property divided into two separate residences, either side-by-side or front-and-back.
Triplex Development: A single property subdivided into three individual residences, each with its own distinct entrance.
Narrow Lot Townhouses: Townhouses designed for narrower plots of land, maximising space by being elongated and typically multi-storey. Each townhouse is individually titled.
Multi Units: A building or complex housing multiple separate residential units, which may share common hallways, lifts, and amenities. Each unit is individually owned or rented.
Grouped Housing: Multiple dwellings — potentially a mix of houses, townhouses, or units — constructed on a single lot, each able to be sold separately.
4.0 Ready to Start a Subdivision Project?
4.1 Further Resources
Want to do some more reading of your own? These resources are useful if you’re planning a subdivision in WA:
- Department of Planning, Lands and Heritage: Responsible for approving subdivision applications and certain strata, lease, licence and related applications on freehold land in WA, and for local government guidelines on subdivisional development.
- Western Australian Planning Commission (WAPC): Receives, processes, and centrally administers subdivision (land development) applications state-wide.
- Local Government Guidelines for Subdivisional Development: Aimed at developers, planners, engineers, technical consultants and contractors involved in subdivisional design and construction.
- Subdivision forms, fees, guides and general information: The WAPC’s resource hub for lodging applications and checking current fees.
One of the best property development tips you’ll ever receive is to partner with an experienced land developer for every step of the process. Summit Developments has one of Perth’s most experienced development teams, ready to help you maximise your returns. To start your property development journey, call our developments team or visit our property development page to request your obligation-free consultation.
