Duplex & Triplex Development

What is a duplex?

A duplex is a single residential building with two separate, self-contained homes within it. Each living unit must have its own separate entrance. It must also be utterly self-contained, with its own bathroom, kitchen, bedroom, living area and so on. 
Typically, a duplex contains two residential units, side by side, with a shared wall. Often, their designs are very similar, if not identical. They will likely be of equal status and value and they can be single or double storey.

What is a triplex?

A triplex is similar to a duplex, except it consists of three self-contained units on a single block of land, rather than two. Triplexes are usually arranged side-by-side, although they can also be stacked or positioned front to back. Again, units share a common wall. The same applies to duplexes.

While the benefits of building a duplex or triplex are compelling, there are also some considerations to bear in mind. You will need to research the zoning of your block, any minimum lot size requirements, as well as council regulations.

Minimum lot size requirements

The minimum lot size requirement depends on your block’s R-code, so there is no standard minimum lot size. R-codes dictate the maximum density and form of development allowed on each property.

The higher your R-code, the higher the density of dwelling allowed. You can find your R-code by checking your local council’s website, or contacting their planning department.

The size and shape of your block will also influence the feasibility and design of the development. Corner blocks with two street frontages are often ideal for triplexes.

Market demand and council considerations

While Perth’s property market remains strong, you should research the specific demand for the area your block is in. Some of the older, more established suburbs in Perth are known for their large blocks, so demand might be less in these areas.

You also need to engage a duplex developer who is experienced in working with local councils, so that they can ensure you adhere to all building codes and local regulations.

Is a duplex or a triplex better for my block?

You will need to consider the specifics of your block to help you decide whether a duplex or triplex is the better option. The first thing to look at is the zoning. Your block’s R-code will tell you how many dwellings you can build on it and whether a duplex or triplex is possible.

The next thing to consider is the size and shape of your block, and what would be most practical. Just because your block’s R-code permits a triplex doesn’t mean it will be suitable. A duplex development might be better for your space.

Consider whether the shape allows an attractive configuration for a triplex or if a duplex would be a better property investment for the space.

You should also take cost into account. Triplexes are likely to incur higher site works costs, and higher overall construction costs. It will also cost more to subdivide into three units, rather than two. That said, the potential for profit is also higher.

It’s worth conducting a feasibility study before you begin the building process. At Novus Homes, a feasibility study forms the first part of any partnership with clients, as we work towards creating a profitable development that delivers the outcomes you want.

Novus Projects is a family run property development business with over 30 years of experience. We offer a tailored approach and take the time to understand exactly what you want to achieve from your development.

We then work closely with you to make sure our building's design is perfectly suited to your vision.

Proven construction track record

Our years of experience mean we know how to navigate the industry. We have a team of trusted contractors and are adept at communicating with councils and local government to streamline approvals processes to meet delivery times.

Having dealt with numerous projects, we are adept at problem solving and adapting to any unexpected obstacles to help you achieve a successful outcome.

Building Awards

Novus Projects is one of the most awarded builders in Perth, with over 150 MBA and HIA Awards, including 3 National Awards for building excellence.

These awards recognise our commitment to delivering a superior product, due to our enduring relationships with trades and suppliers, and the experience and expertise of our team.

Build your next duplex or triplex with Novus Projects

At Novus Projects, we're committed to supporting your development needs and would love to work with you on a duplex or triplex development in Perth. We help you with every part of the process, from your duplex design to the development application and the duplex build. We also offer the same comprehensive service for triplex builds.

 Contact us today to discuss how we can help bring your vision to life.