Top 10 Duplex & Dual Occupancy Builders in Perth
What Is a Duplex or Dual Occupancy Home?
A duplex is a property where two separate homes are built on the same block of land, typically side-by-side (often sharing a common wall) or in a rear-and-front configuration. Each dwelling has its own entry, kitchen, living areas and amenities. A dual occupancy design is a broader term that can include duplex-style builds as well as two dwellings on one lot designed for rental income, multi-generational living, or future subdivision (where permitted).
Why Duplex & Dual Occupancy Homes Are Popular in Perth
Duplex and dual occupancy builds have become a popular strategy in Perth as buyers and owners look for smarter ways to use land. Many homeowners build duplexes to support multi-generational living (for parents or adult children) while keeping privacy and independence. Others build for investment, aiming to generate two rental incomes from one block or sell one dwelling to reduce the mortgage.
With land values rising and demand for housing increasing, duplex projects can be an efficient way to maximise a property’s potential. Modern duplex designs and luxury duplex designs also appeal to owner-occupiers who want a premium new home while retaining the option to rent or sell the second dwelling in the future.
Top 10 Duplex & Dual Occupancy Builders in Perth
1) Plunkett Homes
Specialises in: Duplex developments, dual occupancy homes, custom designs.
Service areas: Perth metro and surrounding WA regions.
Why people choose them: Long-established WA builder with a large design library and proven experience delivering new homes and developments.
Client feedback (sample): “Great guidance through the design and build process and strong communication throughout.”
2) Dale Alcock Developments
Specialises in: Duplex developments, knock-down rebuild projects, luxury duplex designs.
Service areas: Greater Perth.
Why people choose them: Strong development expertise, structured project pathway, and investor-friendly approach.
Client feedback (sample): “Professional team that helped us unlock the potential of our block and keep the project moving.”
3) Summit Homes
Specialises in: Duplex builds, subdivision projects, investment developments.
Service areas: Perth metro.
Why people choose them: End-to-end development support including feasibility guidance and tailored solutions for investors.
Client feedback (sample): “Supportive from planning through to construction very investor aware.”
4) Danmar Homes
Specialises in: Dual occupancy homes, small developments, flexible layouts.
Service areas: Perth and surrounding WA regions.
Why people choose them: Known for practical designs and experience delivering dual occupancy projects.
Client feedback (sample): “Flexible with design and the finished homes exceeded expectations.”
5) New Choice Homes
Specialises in: Duplex and triplex developments, investment homes.
Service areas: Perth metro.
Why people choose them: Investor-focused designs and experience delivering multi-dwelling outcomes.
Client feedback (sample): “Good communication and a smooth build experience overall.”
6) Progen Building Group
Specialises in: Duplex property development and subdivision projects.
Service areas: Perth metro.
Why people choose them: Development-first approach and support for investors through the end-to-end process.
Client feedback (sample): “Helped us understand the development process and made it simple to action.”
7) Chross Homes
Specialises in: Duplex, triplex and townhouse developments.
Service areas: Perth metro.
Why people choose them: Custom development capability and hands-on project management for multi-dwelling builds.
Client feedback (sample): “Excellent project management and clear updates from start to finish.”
8) Boda Building Group
Specialises in: Modern architectural duplex builds, dual occupancy designs, luxury finishes.
Service areas: Perth and WA.
Why people choose them: Premium design-led outcomes and investment-ready duplex/triplex experience.
Client feedback (sample): “High-quality finish and modern design great attention to detail.”
9) Into Place
Specialises in: Architecturally designed townhouse and boutique multi-residential projects (including duplex-style builds).
Service areas: Perth metro.
Why people choose them: Suited to modern, design-forward developments and boutique builds.
Client feedback (sample): “Strong design outcome and well-managed delivery.”
10) Dual Income Plus
Specialises in: Dual occupancy investment homes designed for rental yield.
Service areas: Perth and WA.
Why people choose them: Investment-driven duplex solutions with a focus on two-income outcomes.
Client feedback (sample): “Great for investors, clear advice and practical layouts for tenants.”
Quick Comparison of Perth Duplex Builders
| Builder | Best For | Project Type |
|---|---|---|
| Plunkett Homes | Established builder | Duplex & dual occupancy |
| Dale Alcock Developments | Premium developments | Duplex & knock-down rebuild |
| Summit Homes | Property investors | Duplex subdivision |
| Danmar Homes | Affordable builds | Dual occupancy homes |
| New Choice Homes | Developers | Duplex & triplex |
| Progen Building Group | Investment projects | Duplex specialists |
| Chross Homes | Custom developments | Duplex & townhouses |
| Boda Building Group | Luxury builds | Duplex & dual living |
| Into Place | Boutique projects | Modern duplex / townhouse |
| Dual Income Plus | Rental investment | Dual income homes |
Cost Guide: How Much Does It Cost to Build a Duplex in Perth?
Duplex build pricing varies based on site conditions, design complexity, two-storey vs single-storey layouts, access, engineering, and the finish level. As a general guide, duplex builds are often quoted as a cost per square metre, with premium inclusions and architectural detailing pushing the rate higher.
- Entry level: $2,300 – $2,700 per m²
- Mid-range: $2,800 – $3,500 per m²
- Luxury duplex designs: $3,600 – $4,450+ per m²
Tip: Always confirm what’s included (siteworks, retaining, service connections, storm-water, landscaping, fencing, driveways, subdivision works, and internal upgrades). The cheapest quote can become the most expensive once variations are added.
Latest Market Insights (2026)
- Duplex builds are growing in popularity as owners look to maximise land value and create two-income outcomes.
- Strong demand for new homes in growth corridors and established infill suburbs is driving more small-scale developments.
- Construction costs remain a major planning factor, transparent inclusions and realistic allowances matter more than ever.
Top 5 Perth Suburbs Where Duplex Builds Are Popular
- Baldivis – Growing estates and larger blocks support dual occupancy builds.
- Morley – Infill opportunities close to the city suit duplex redevelopment.
- Scarborough – Coastal land value drives demand for premium and luxury duplex designs.
- Gosnells – Investor activity and rental demand support duplex projects (site dependent).
- Armadale – Growth corridor dynamics make duplexes attractive for value-focused builds.
Tips for Choosing the Right Duplex or Dual Occupancy Builder in Perth
- Choose a builder with proven development experience: Duplex builds require more planning around fire separation, services, access, and potential subdivision.
- Understand your zoning and planning rules early: Ask your builder what setbacks, parking, open space and frontage requirements apply in your LGA.
- Get a detailed inclusions schedule: Confirm exactly what’s included and what’s an allowance especially siteworks, retaining, storm-water and driveways.
- Ask for similar completed projects: Request 2–3 recent duplex builds in suburbs like yours and ask what challenges came up (and how they were handled).
- Plan for end buyer/tenant demand: Great dual occupancy designs focus on privacy, storage, light, parking, and practical layouts that rent and resell well.
FAQ: Duplex & Dual Occupancy Homes
What’s the difference between a duplex and dual occupancy?
A duplex is commonly two attached dwellings (often sharing a wall). Dual occupancy can include duplex-style homes and other configurations where two dwellings exist on one lot.
Can I live in one and rent the other?
Yes, this is one of the most common reasons people build dual occupancy homes. It can reduce mortgage pressure and increase long-term financial flexibility.
Can I subdivide a duplex in Perth?
Sometimes. Subdivision depends on local planning rules, servicing, frontage/access and the development design. Always check early before committing to a layout.
Are duplex builds cheaper than building two separate houses?
Often, yes, because land costs are shared and some infrastructure can be more efficient. Final costs depend on design, site conditions, and finishes.
Summary
Duplex and dual occupancy projects are a powerful way to add flexibility and value, whether you’re building for parents, creating an investment property, or designing a future-proof new home. The best results come from selecting experienced duplex builders and dual occupancy builders who understand Perth planning rules, provide transparent inclusions, and can show completed projects similar to your site.
