Duplex Builders in Sydney

Townhouse and Duplex Builders Sydney

We build architecturally designed homes that reflect your lifestyle, values, and vision.

1

Quality Workmanship

We treat every home like it’s our own, using trusted trades, quality materials, and thorough internal quality control checks at each stage. Your home will meet all codes, match the approved plans, and be built to last.

2

Transparent Process, No Surprises

There are no hidden costs or unexpected surprises. We provide clear pricing, detailed proposals, and a step-by-step process, you’ll always know what to expect.

3

Post-Construction Guarantee

Our support doesn’t end at handover. We follow up at 3, 6, and 12 months to make sure everything is performing as it should. If it’s not, we’ll take care of it. That’s our commitment to long-term quality and peace of mind.

Arncliffe Duplex Custom Builder And Basement
Arncliffe Duplex Builder
Bexley Duplex Builder

Duplexes Are Being Built for Modern Living In Sydney

From Practical to Luxury Living
In Sydney’s competitive property market, duplex and townhouse developments are a smart way to maximise the potential of your land. Whether you’re looking to create two luxury residences to sell, live in one and rent the other, or design a home that supports multi-generational living, Phase Projects delivers high-end builds that combine practicality with architectural appeal.
From complex narrow block builds to statement luxury inclusions, our duplex and townhouse projects are designed to stand out, inside and out.

Duplex & Townhouse Building Services We Deliver:

  • Custom duplex design for narrow or sloping blocks
  • Full project management from concept to completion
  • Basement integration for parking, storage, or lifestyle spaces
  • Luxury lifestyle features: pools, rooftop terraces, and outdoor kitchens
  • Multi-generational floor plans for flexible living arrangements
  • Private garages with car turntables for tight-access sites
  • Energy-efficient design and smart home technology integration
  • Design solutions to ensure privacy and reduce noise transfer between homes
  • Construction tailored for resale, rental return, or personal use

With Sydney land prices at a premium, homeowners and developers are turning to duplex builds for their ability to double returns from a single site. Benefits include:

A Custom Designed Townhouse Or Duplex

Working With Homeowners & Investors
We collaborate with both private homeowners and property investors to deliver the right outcome for each project. Whether the goal is a cost-effective build that maximises rental yield, or a luxury residence that commands a premium sale price, we tailor every design and construction decision to suit your objectives.
We also take care to design with privacy and comfort in mind, incorporating acoustic insulation, thoughtful floor plan layouts, and noise-buffering materials so each home feels peaceful and self-contained.

Why Sydney Duplex Builds Are on the Rise

  • Two homes from one land purchase
  • Flexible living arrangements: live in one, rent or sell the other
  • Multi-generational housing solutions without sacrificing privacy
  • Increased resale value with high-end design and finishes
  • Optimised use of narrow or challenging blocks
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Designed for Real Life

Duplex Living With Beautiful Finishes

We blend spatial logic with refined detailing — ensuring your home not only looks exceptional but lives effortlessly.

We Would Love To Be Your Sydney Duplex Build Partners

We’ve delivered duplex and townhouse projects that combine engineering precision with refined finishes, including:

  • Arncliffe Duplexes: Custom-built with fully excavated basements, private garages, and car turntables for effortless parking in a tight urban setting. Each residence features a swimming pool, outdoor living area, and warm, textural finishes.
  • Bexley Duplex Townhouses: A contemporary design with curved façade elements, resort-style pools, and private alfresco areas, striking the perfect balance between lifestyle and investment.
  • Revesby Duplexes: Designed for lifestyle and rental return, with open-plan living, modern kitchens, and carefully selected finishes to create comfortable, low-maintenance homes.

We build duplexes or townhouses that maximise the potential of your land. Whether it’s creating investment opportunities, additional income or creating a multi generational family home.

Arncliffe Duplex Custom Builder And Basement

Ready For A Quote & Consultation?

Begin your project with a complimentary quote and consultation that gives you clarity, confidence, and expert guidance. Whether you build with us or not, you’ll get a clear plan for your project. We will:

  • Answer your questions, including the ones you may not know to ask, so you can avoid costly mistakes.
  • Help refine your vision for your custom home or renovation and outline the best options to bring it to life.
  • Provide a realistic overview of building and renovation costs, showing where to prioritise investment for maximum value.
  • Explain how Phase Projects delivers custom homes and high-end renovations on time, on budget, and to the highest standard.

Your consult is with Mohamed, owner of Phase Projects, who brings over 20 years of experience delivering architecturally designed homes and renovations across Sydney’s Inner West, Eastern Suburbs and Southern Suburbs.

Get A Complimentary Quote

Receive a tailored, no-obligation quote from Mohamed within 24 hours. Prefer email? Contact us at info@phaseprojects.com.au.

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What Sets Us Apart

It’s not fast-tracked. It’s not left to chance. It’s designed to remove doubt, elevate quality, and deliver an experience as considered as the home itself.

No Surprises, No Stress

Far too often, homeowners are surprised and disappointed when their finished home is missing the features they discussed with their builder. With Phase Projects, we ensure that every detail is captured and included.

Deal Directly with the Us

At Phase Projects, you deal directly with Mohamed, the business owner. You’ll have his personal mobile number, receive immediate responses to your questions, and always be kept informed about your Project.

Highly Qualified tradespeople

Mohamed and his team bring hands-on expertise to every project. This hands-on background means that every aspect of your build is overseen by someone who understands the craft and pays attention to every detail.

Experience You Can Trust

With over 20 years of experience, Phase Projects has earned a reputation for reliability and quality. Our proven process, combined with a team of skilled tradespeople, ensures that you receive a first-class custom home.

Get Answers You Need—100% Free

Navigating the world of custom homes can be overwhelming. The quickest way to get answers and clarity on your custom home journey is to contact us.

No-Obligation Session

This session will be with Mohamed, the owner of Phase Projects, who will share over 20 years of experience in building custom homes across Sydney.

Client Testimonials

What Our Clients Have To Say

Our Projects

Explore Our Latest Luxury Home Builds

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Townhouse and Duplex Build FAQ’s

Got another question? Please reach out to us!
After 20 years of building homes in Sydney, we have built all sorts of homes and dealt with all planning, design and approval scenarios!

They allow you to create two residences on one block of land, increasing potential returns and offering flexibility for living, renting, or selling.

Timelines vary based on design complexity and council approvals, but most duplex projects take 10–14 months from design to completion.

Yes. We specialise in overcoming challenging site conditions to deliver functional, high-quality homes without compromise.

Yes. All duplex projects require Development Application (DA) approval, and we manage the process from start to finish.

Absolutely. We work with both, tailoring each build for either a practical, cost-effective result or a luxury finish that commands higher sale prices.

Yes. We’ve built duplexes with fully excavated basements for parking, storage, and lifestyle spaces, even adding car turntables for narrow blocks.

We use thoughtful floor plans, acoustic insulation, and noise-buffering materials to ensure each home feels private and self-contained.

Yes. We create layouts that allow shared living while maintaining privacy and independence for all occupants.

Yes. We often include pools, rooftop terraces, high-end joinery, and custom façades to elevate the look and lifestyle.

This is one of the first things potential clients ask!
They know that building a duplex ticks many boxes when it comes to property investment.
But it depends on your site, design, finishes, and goals for the project. We provide a tailored, detailed proposal after assessing your land and requirements.

Ready to Build Your Custom Home?

0423 652 812