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Dreaming of a premium custom Duplex Unique to your style?

Our Duplex Designs Help You Maximise Space and Drive ROI

Typically, a duplex home features two homes with a common wall but on separate land titles. More than a creative use of space, building a duplex in Western Sydney doubles the equity of your property without doubling the investment cost.

The result?

Strong returns with relatively lower risk.

Maybe you want to build an investment property and take advantage of Western Sydney’s growing reputation as a highly liveable area. You might be thinking about dual income as you rent one or both of your duplex homes. Or, you could be looking to supplement your mortgage by renting out one side of your new duplex.

As your partner from the design phase to handing over the keys, we’re committed to helping you enjoy the best possible investment return.

  • High-yield
  • High-growth
  • Positive cash flow
  • Reduced building costs

With 20+ years of experience, the Kobo Projects team aims to maximise your property’s potential by combining meticulous planning and expert craftsmanship to build a dual-occupancy home with the highest ROI possible.

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Interested in Building a Duplex But Unsure Where, When or How to Get Started?

Zoning laws. Confusing market value. Complicated subdivision rules. Unclear construction costs.

If you’re excited about a duplex’s versatility and ROI but feeling overwhelmed by the duplex building process, we don’t blame you (and you’re not alone).

It’s easy to get swept up in the excitement of a duplex construction when thinking about extra rental income or selling down the track. But, if you’re like the ambitious clients we work with throughout Western Sydney’s suburbs, you might have questions about the challenges of building a dual-living home.

When it comes to your duplex building journey, have you faced any of the following challenges?

You’re looking for the best duplex designs to meet your needs…

But you can’t find a local builder who can bring your vision to life the way you imagine.

You have a strict budget for your build…

And every duplex building quote threatens to blow your budget out of the water.

You’re unsure if your land is suitable for duplex construction…

And you want honest and transparent feedback on whether your land can even be used.

You’re juggling a busy life, family and job while trying to build your home…

And you have no idea where, when or how to find a duplex builder to support you.

If you resonate with ANY of the above or if you’re just looking to speak with a local custom builder who understands your vision, we can help. At Kobo Projects, our team prides itself on delivering expert-level work every step of the way.

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Throughout the construction process, communication was seamless. Kobo projects kept us informed at every stage, providing updates and addressing any questions or concerns promptly. Their transparency and reliability made the entire journey stress-free.


Working with Koboprojects was a fantastic experience. The attention to detail and commitment to quality in our new build exceeded our expectations. The communication throughout the process was excellent, making the entire journey smooth and stress-free. We now have our dream home, thanks to Koboprojects.


The level of professionalism and attention to detail displayed by the entire team was exceptional. They took the time to understand our vision and requirements, and their expertise and creativity truly brought our dream project to life.


We are thrilled with the craftsmanship and professionalism displayed by Koboprojects during the construction of our new home. Joe’s expertise, dedication, and adherence to timelines made the entire project a pleasure. Our sincere thanks for turning our vision into reality!"


It was a pleasure working with Kobo Projects, and I have no hesitation in recommending their services to anyone in need of a construction partner they can trust. Thank you for making our vision a reality, and we look forward to collaborating with you again in the future.


We couldn't be happier with the outcome of our new build, all thanks to koboprojects. The meticulous attention to detail and the ability to bring our ideas to life were remarkable. If you're looking for a reliable and skilled builder, koboprojects is the one to trust.


We’re Western Sydney’s Experts in Dual Occupancy Design and Living

‘Multi-residential development’ might sound like a buzzword you’d find in a builder’s brochure. It just means you get your home, your way.

At Kobo Projects, we understand that every Western Sydney family and potential homeowner is unique. Our dual occupancy homes are fully tailored to your lifestyle or investment goals.

We know you’ve got better things to do than jump through council hoops. That’s why we also take care of everything - from feasibility and approvals, subdivision and permits, to design and construction - all with project management support from start to finish.

We’ve built modern duplex designs for narrow blocks of land, larger properties, and two and even three-story homes. Our layout is tailored to your needs whether finding the right window placement to bring in natural light or enhancing your privacy.

Leverage our extensive experience and track record of excellence to maximise the use of your land, whatever that looks like to you.

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20 yrs experience
60+ projects

What Makes a Duplex Such a Popular Construction Choice?

Maximise equity in your property
Perfect for high-demand suburbs
No strata fees to worry about
Potential for rental income
Keep family members close
Prefect for Airbnb rental listings
Starting point for first time investors
Higher potential rental yield
Why choose us as your builders
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Why Build a Duplex with Us?

Building a duplex can have almost double the value of a single home… but only if you partner with the right construction team.

At Kobo Projects, we understand the importance of choosing the right builder for your investment. Our decades of experience across multi-residential construction allows us to design, develop and build duplexes to your specific customisation.

Duplexes are a proven way to build value into your property from day one, rather than waiting years to see it. With growing demand for housing in Western Sydney,  duplex construction offers exciting value - especially near public transport, schools and other amenities.

Maybe you want to drive dual income and instant cash flow for the cost of a single piece of land. Or, perhaps you’re interested in taking equity out of your new duplex to support further property investment.

Whatever your long-term property goals, we’re here to support you. We work out all the little details to bring your creative input to life at every project stage. Our experienced team is there to answer any of your questions to ensure you feel confident during the entire process and wake up to a multi-dwelling home you love.

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Your Family Matters to You. So They Matter to Us.

The Western Sydney property market is a significant challenge to navigate - with no obvious end in sight.

Whether you’re looking to support adult children in entering the property market, looking for a close and safe space for elderly relatives, or simply want the advantages of intergenerational living, a duplex approach provides lasting solutions.

Imagine having babysitters next door you can trust. Giving Mum and Dad a place to live with their own space and independence. Or, simply knowing your family has a foot in the door of Western Sydney’s real estate market.

Dual occupancy is a proven strategy to drive high rental yields and high ROI when it comes time to sell. But when there’s life to live, and a family to support, a duplex becomes so much more.

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Over 60 Families Have Trusted Us to Build Their Homes – Here’s Why

We Bring 20+ years of Experience

With over two decades working in Western Sydney, our extensive experience in project management, including budgets and timelines, helps deliver premium results without cutting costs or corners.

We’re Actually Custom Builders  

Plenty of “custom duplex home builders” talk a big game then ask you to choose from a brochure. With our industry-leading architectural designers, you can customise every aspect of your design for a one-of-a-kind duplex.

We Keep Costs (and Stress) Down

Our proven process helps keep your duplex building costs down while effectively delivering two homes for the price of one. From project inception to completion, our exceptional project management skills ensure we stay on time and budget.

We Deliver an Unmatched Service

We’re big enough to provide exceptional work, but small enough to care and give you the attention you need. Deliberately staying small means one-on-one service which allows you to  craft your vision into reality.

When Two is Better Than One

IS a duplex right for you?

From knock-down rebuilds to side-by-side duplex homes, to townhouses and even triplexes, our multi-residential home builders are here to build for maximum space and incredible value for money.

Building a duplex
Building a Home
Cheaper Building Costs*
Dual Living Capability
Passive Income Potential
Build Equity Fast
Flexible Living Options

Looking to learn more about our duplex designs and prices? Chat with a member of the Kobo Projects team to understand how easy it can be to maximise the value of your land, make the best use of space, and create a highly appealing home for tenants or future buyers.

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The Kobo duplex building process

Step 1

Reach out about your vision

Please don't hesitate to contact us via our "Contact Us" section, or if you prefer a friendly conversation, don't hesitate to give us a call. We genuinely enjoy getting to know you and learning about your ideas and vision. If it appears that we're a good fit, we'll schedule an in-person meeting at your location.

Step 2

Face to face meeting

During our face-to-face meeting, we'll discuss your plans, whether they're still in your thoughts or already documented on paper, and begin conversations about timelines, necessary documentation, and how everything will come together. Do some homework and come prepared with inspiration ideas, photos, preferred styles, required functionalities, or any other elements that will aid our design team in crafting the ideal design for you.

Step 3

Design & Quote

We'll then offer a design proposal and a cost estimate (not the final quote). If you wish to proceed, we'll send a preliminary agreement, beginning the design process. Following approval for floor plans & elevations, we'll provide a final cost estimate. We'll refine the quote until it's ready for the construction phase, bearing in mind possible adjustments based on consultant documents like geotechnical reports, structural designs, & BASIX requirements.

Step 4


Upon acceptance of the quote, we'll proceed with construction plans, BASIX certificate, structural design, and more for CDC or DA submission. Our building designer will handle plan submission and obtain the necessary construction certificate to initiate the building process!

Step 5

Contracts Signed & Commencement

Once all documentation is in hand, we'll complete the quote, sign contracts, and begin the project! We'll mutually agree on a start date, and once construction begins, we'll schedule regular site visits to ensure your satisfaction, provide updates, and accommodate any inclusion changes if desired.

Step 6

Construction Begins

This is where the magic happens! Our expert team begins construction of your stunning new residential or commercial project on the agreed upon date. We make sure to keep you in the loop the entire build and aim to build with minimal disruptions. Our expert team gets to work to make your dream happen.

Step 7

Handover & Aftercare

The long-awaited day has come! We'll hand over the keys to your new home and conduct a walkthrough to ensure everything is in order. Over time, it's natural to come across minor issues, and we'll always be available to address any concerns or defects you may encounter, ensuring you are happy with everything in your build.

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Other Info

About Western Sydney, NSW

Nestled in the vibrant heart of Australia, Western Sydney is a dynamic and culturally diverse region that seamlessly blends urban excitement with natural beauty. Boasting a tapestry of communities, this area is a melting pot of cultures, creating a unique and enriching experience for residents and visitors alike.

Prominent landmarks punctuate the skyline, with the iconic Sydney Olympic Park standing as a testament to the city's global presence. This sprawling complex hosts world-class events and offers a green oasis for recreational activities. For those seeking a dose of history, the Old Government House in Parramatta stands proud, narrating tales of colonial Australia.

As day turns to night, Western Sydney's culinary scene comes alive. Wander through the vibrant streets of Parramatta and discover a plethora of dining options, from trendy cafes to fine dining establishments. Don't miss the renowned El-Phoenician, serving exquisite Lebanese cuisine, or Husk & Vine Kitchen and Bar, a local favourite for modern Australian fare.

With scenic parks, historic sites, and a diverse culinary landscape, Western Sydney invites exploration and promises an unforgettable journey through the heart of Australia's cultural tapestry.

Things to do in Western Sydney

Whether you're visiting or local to SUBURB, here are some of the most popular things to do in the area:

Bankstown Hotel

Bankstown RSL Club

Bankstown Central

Take Advantage of an Obligation-Free Chat with Western Sydney’s Custom Home Experts

At Kobo Projects, we understand your peace of mind is priceless - so we don’t charge you for it. Claim a zero-pressure consultation with a local duplex builder and discover why we’re trusted throughout Western Sydney.
Building? Get in touch with kobo today
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