Duplex vs Triplex vs Multi-Unit Development in Perth: Which Fits Your Block?

A duplex puts two homes on one lot, a triplex puts three homes on one block, and a multi-unit development puts two or more dwellings on one block, from twin homes to townhouses, villas and small apartments. Which one fits depends on your zoning, lot size and frontage, and a feasibility study confirms it before you commit.

What is a duplex development?

A duplex development is two separate homes on a single lot, each with its own entrance and living space. It suits investors who want dual rental income and families who want multigenerational living on one property.

What is a triplex development?

A triplex development is three separate homes on one block. It spreads shared construction costs across three dwellings, which lowers the cost per dwelling, and it suits owners who want higher rental yield, more resale potential or a larger property portfolio.

What is a multi-unit development?

A multi-unit development is any project with two or more dwellings on a single block. It can include duplex or twin homes, triplex housing, townhouses and villas, or small multi-dwelling complexes. It suits investors seeking higher rental yields and developers maximising land value.

How do you decide which fits your block?

• Zoning: we assess your zoning (R20 to R60), lot size and frontage first.
• Feasibility: a feasibility report covers costs, timeline and expected returns.
• Approvals: development applications and building approvals must comply with the R-Codes.
• Goal: decide whether you plan to sell, rent or live in the finished homes.

What happens after you choose?

Every BD Living development follows the same stages: consultation and site assessment, feasibility, design and approvals, construction and project management, then handover. For duplexes, handover includes strata titling and inspections.

If you own a large block and want to compare other options, such as a granny flat or a second home at the rear, read our guide to ways to use your block. When you are ready, book a free consultation.

Explore Multi-Dwelling Development