Double the Homes. Double the Returns
Build Two Cashflow-Positive Homes on the Right Block with Right Strategy, Done for You.
At Symbion Property, we help investors with high-performing duplex developments…
done for you, backed by data, and positioned for real results.
Slower returns from single builds?
Sitting on equity but not sure what to do next?
A portfolio that’s growing… just not fast enough?
Are You Seeing This?
You’re not alone. Most of our clients came to us after years of buy-and-hold—waiting, hoping, and riding the market.
But here’s the thing: you don’t have to wait.
You can build equity faster, boost cashflow, and grow your portfolio smarter.
We help investors do just that through strategic duplex developments—handled end-to-end, with none of the overwhelm or risk of doing it solo.
Why Duplex Developments?
Accelerated Equity Growth
Build two homes, boost your returns faster without waiting on the market.
Dual Income Potential
Two rental incomes from one block = more cashflow, more security.
Smarter Use of Land
Maximise your block’s potential and development upside.
Better Tax Benefits
Higher depreciation = stronger deductions and better end-of-year outcomes.
Flexibility & Resilience
Live in one, rent the other. Rent both. Sell one. You’ve got options.
"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
What Sets Us Apart
We don’t just build two homes. We build high-performing assets on the right block, with the right team, designed for real results.
Expert Market Intel
We go deeper than most and that’s where the profits are.
We identify the exact street and lot with the best growth and rental potential
We tailor builds to what the market actually wants (and will pay top dollar for)
We avoid the costly mistakes like building the wrong layout, in the wrong area
We assess every risk: flood zones, flight paths, future zoning, you name it
Strategic, High-Impact Design
We custom-create for value, appeal, and performance.
Floorplans designed to maximise livability and equity
Smart layouts tailored to your end goal, rent, hold, or sell
Cost-efficient builds that still deliver that high-end “wow” factor
A-Team Execution
We’ve already built the dream team so you don’t have to.
Draftspeople who get development (not just design)
Builders we trust with both your money and your timeline
Interior decorator to keep your property sharp, stylish, and in demand
End-to-End Project Management
We take the whole project off your plate but keep you in control.
DA approvals, council paperwork, and red tape, handled
On-site construction oversight and proactive problem solving
Real estate liaison to secure strong rental returns from day one
Optional sales support if you're ready to sell and scale up again
Not only that, but we can save you money…
We’ve secured exclusive discounted rates with trusted consultants, builders, and suppliers, rates the average investor simply doesn’t have access to. We pass those savings directly on to you, giving you a better-quality build at a sharper price. That means more value, more equity, and more money in your pocket long term.
Our Proven Process
"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
Backed by Industry Expertise—and Real Results
Symbion is led by a HIA award judge with deep industry insight, a network of vetted professionals, and a proven track record of delivering duplex projects that actually perform.
Strategic site selection backed by micro-level research
Expert design and build management with zero fluff
A boutique, high-touch service where you’re never just a number
$150K–$400K+ returns delivered for real clients across NSW
We’ve done this before. Many times. With results to prove it.
Let’s Build Something Smarter
You’ve done the groundwork. You know the game.
Now it’s time to scale it—strategically.
Let’s talk about your goals and see if a duplex development is your next smart move.