Smarter Duplex Developments.
Backed by Data. Built for Returns.
At Symbion Property, we help growth-focused investors unlock faster returns through expertly managed duplex developments, designed to outperform, built to last.
Why Invest In Duplex Developments?
Because one property at a time won’t cut it anymore.
In today’s market, savvy investors are shifting from “buy and wait” to “build and accelerate.”
A Duplex gives you:
DOUBLE THE RENTAL INCOME
Two properties,
one construction
Faster equity growth
Better depreciation benefits
Financial security with dual tenancies
This is a high-performance, low-hassle strategy to scale your portfolio right now.
“Making the shift from traditional buy-and-hold investing into property development has been the most empowering decision of our investment journey. For years we relied on rental income and long-term growth, watching the market move around us and feeling like we had little control. Now, instead of waiting for capital growth, we create it.
The financial rewards are stronger, the timelines are faster and the maintenance less.
We only wish we had started with Joanne sooner.”
Sharon and David (Central Coast)
How can we help you?
We show you exactly how we turn one block of land into two high-performing homes with dual income potential, instant equity, and long-term growth.
From sourcing the perfect block to handing over two income-generating homes, we take care of the full development journey, saving you time, stress, and costly missteps.
With hands-on experience, a track record of results, and a sharp eye for strategy, I know what it takes to turn a block of land into a high-performing asset.
My journey started working for a property developer. After doubling my cash on my first property in just six weeks, I was hooked. Years, and many investment strategies later, I kept coming back to one thing: duplex developments. Why? Because they simply deliver better results.
Today, I help investors build smarter portfolios through expertly managed, high-return duplex projects.
Hi, I’m Joanne…
the Founder and Strategic Lead at Symbion Property
Why Work With Symbion
We’re your strategic partner in growing long-term wealth.
Led by a HIA award judge with deep industry insight
Boutique service—you’re never just a number
Expert advice tailored to your goals and the market
Proven client results
($150K–$400K returns per project and counting)
Client wins…
Sharon & David (Central Coast):
24% return on their first duplex
Ratko (Sydney):
$400,000 on project #1, now on his second
John (Northern Beaches):
$263K on project #1 another in DA and another in construction
Mads (Perth):
$116K on project #1, 2 more under construction
Testimonials
"As a long-term property investor, I’ve worked on many projects, but my experience with Joanne on a recent duplex build truly stands out. The project was a huge success, delivering strong profits and a high-quality outcome.
Her creativity, can-do attitude, and tenacity made constructing during a challenging time so much easier. She was easy to work with, always focused on achieving the best result. We have now started construction on our second project together.
Joanne’s ability to navigate challenges and deliver exceptional results makes her an invaluable partner, and I look forward to future collaborations"
Ratko Milosavljevic
“I cannot speak highly enough of Joanne and the incredible service she provided throughout our small development project with Symbion Property. From the very first consultation, Joanne was not only professional but also genuinely attentive to our needs. She brought an impressive level of expertise, knowledge and organisation to the table. She connected us to her team of hand picked professionals, which was invaluable. Making the whole process stress-free.
We made a great profit on our first project and are doing 2 more now!”
Mads and Nicole
“I was overwhelmed by the idea of building a home for myself and my child with multiple disabilities. Joanne immediately put me at ease with her knowledge, patience, and understanding of the complex council requirements.
Thanks to her guidance, we now have a safe, comfortable home that truly meets my child’s needs. Joanne made a daunting process manageable, and I can’t recommend her and her team highly enough.”
Jodie Welch
"Jo has been an invaluable part of our journey at Symbion Property. She has expertly managed the construction of four houses for us and is currently overseeing the completion of another two. Her attention to detail, problem-solving skills, and ability to keep projects on track have made the entire process seamless. Jo’s expertise, proactive communication, and dedication to delivering high-quality houses have given us complete confidence in every build. We highly recommend her to anyone looking for a reliable and experienced property development manager."
Vanessa Newtown