Skip to main content

Triplex Property Development – turn one block into three!

As Perth local councils and other state government authorities look to increase the density of homes in suburbs across the Perth metropolitan area, opportunities to subdivide blocks into triplex property developments are more likely to be possible.

A triplex development is the creation of 3 dwellings on 1 block of land. The appeal for property investors is the increased potential returns that can be realised by building 3 properties whether they are for sale or for renting.

Triplex developments can be single storey units or 2 storey town houses. The most common accommodation configurations are either 4 bedrooms with 2 bathrooms or 3 bedrooms with 2 bathrooms. These offer the best return on investment and will appeal to Perth renters and buyers alike.

Further information

Understanding what can and cannot be built within the residential planning codes, or R-Codes as they are commonly referred to, is the first step that any successful property developer will undertake.

While there are a number of factors to consider, you can usually undertake a triplex subdivision with R20 to R40 zoning, depending on the size of your block, using the formula’s below:

Triplex Development Requirements

Zoning Required Land Area
R20 1350m2
R25 1050m2
R30 900m2
R40 660m2


We are a design and construct builder and can provide a complete in-house design solution for your triplex development.

A triplex subdivision does bring with it some design and development constraints. Consideration must be given to setbacks, streetscape, car parking and vehicle access to name just a few.

For your triplex project to be a success we highly recommend you speak with a professional early to ensure the initial plans you have drawn up for your unit or townhouse development align with R-Codes and local shire requirements.

As part of the process for your triplex development we provide preliminary designs including elevations, finished floor levels, total house area, plot ratios, site coverage, retaining walls and setbacks. Also consideration should be given to provisions for connection to sewer, water, power, gas, data and phone lines

It is important when comparing builders on price that you are comparing apples with apples. It is for this reason that we pride ourselves on offering a completely transparent quoting process and will provide a fixed price quotation upfront for your triplex development project.

We will provide you with a confirmed letter of quotation, with itemised costs including preliminary site costs and specification.

Ready to get started? Get in touch and we can help by providing you with:

  • A feasibility & risk assessment
  • Block yield calculations
  • Buyer demand analysis

Need Some Advice for Your Property Development?

Whether you're a first timer or an experienced developer, we're here to offer our support, advice and expertise.

Get in touch and we can help get started with:

  • A feasibility & risk assessment
  • Block yield calculations
  • Buyer demand analysis

  CALL 08 9240 6020