Duplex & Multi-Unit Builders in Perth metro
Duplex and multi-unit building covers everything from a straightforward side-by-side duplex on a subdivided block to triplexes, villa developments and small apartment blocks. It's a different job to a standard single-home build: the builder needs to manage shared walls, party wall agreements, staged handovers, strata or survey-strata titling, and often a tighter build program to keep holding costs down. Many of the 56 builders in this Perth metro category work across both owner-occupier duplexes and investor-driven multi-unit projects, so their experience with council approvals, R-Codes compliance and subdivision timing varies quite a bit from one to the next.
Before you commit, look at a builder's track record with projects similar in scale to yours, not just their display homes. Ask to see completed duplexes or unit sites, check how they handle fixed-price contracts versus cost-plus arrangements, and get clarity on who manages the titling and subdivision process. Confirm their registration, insurance (including home indemnity insurance), and whether they use their own site supervisors or subcontract the whole job out.
Our scoring weighs verified reviews, licensing and complaint history, years operating in this category, and consistency across multiple projects, so you can compare builders on more than just a glossy brochure. For a ranked shortlist, see our best home builders guide, and read our methodology to see exactly how we score and verify each business.
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All duplex & multi-unit builders, ranked by score and relevance
56 businesses. The order weighs each business's overall score by how much of its reviewed work is duplex & multi-unit builders, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
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Common questions about duplex & multi-unit builders
- How much does a duplex build cost in Perth?
- Costs vary widely with land, finishes and site conditions, but most Perth duplex builds run from a few hundred thousand dollars for a basic side-by-side project up to well over a million for larger or higher-spec multi-unit developments. Get itemised quotes from at least two or three builders before comparing, since inclusions differ a lot between fixed-price contracts.
- How long does a duplex or multi-unit build take?
- A typical duplex takes roughly 8 to 14 months from slab to handover, depending on approvals and weather delays. Larger multi-unit sites with more dwellings or basement parking can take well over a year once subdivision and titling are factored in.
- What should I expect during the subdivision and titling process?
- You'll usually need council approval for the subdivision alongside your building approval, and titles (whether green title or survey-strata) are often only issued after the build is substantially complete. A good builder or their consultant will walk you through this timeline upfront so you're not caught out by delays in settlement or selling one side before titles are separate.
- How do I judge the quality of a multi-unit builder before signing a contract?
- Visit completed projects in person, talk to past clients if you can, and check the builder's registration and any complaint history with Building and Energy WA. Look closely at how defects were handled after handover, since that says more about quality than the display home does.