How Long Does It Take to Build a Custom Home in Melbourne?

A high-end, architect-led custom home in Melbourne’s eastern suburbs typically takes 18 to 22 months from first design to handover: about 6 to 8 months for design and permits, then 12 to 14 months of construction. That is well beyond the state average of about nine months, which counts construction only and is driven by volume builds.

Master Builders Victoria put the 2024–25 average build time for a detached house in Victoria at about 39 weeks. That figure is dominated by project homes on greenfield lots with standard specifications. A one-off home designed by an architect, on an established block in Boroondara, has more stages and more decisions in it.

What Are the Stages, from First Sketch to Handover?

1. 1Design and documentation — concept, design development, engineering, energy rating, and a full documentation set the builder can price from.
2. 2Planning permit (if needed) — required when a planning overlay, a heritage overlay or a planning scheme provision applies to the site.
3. 3Building permit — issued by a registered building surveyor once documentation, engineering and home warranty insurance are in place.
4. 4Demolition (knockdown rebuild) — disconnection of services, demolition permit and site clearing.
5. 5Construction — base, frame, lock-up, fixing, completion.
6. 6Handover and defects period.

Only stage 5 is what most “how long does it take to build” answers are talking about.

How Long Do Design and Permits Take?

We allow 6 to 8 months for design and permits on a custom home: documentation, engineering, energy rating, any planning permit, and the building permit. Sites with a heritage overlay or objections from neighbours sit at the longer end, or beyond it.

How Long Does a Planning Permit Take in Victoria?

Councils have 60 statutory days to decide a planning permit application, but statutory days are not calendar days. If the council asks for further information (it can do so within 28 days of lodgement), the count goes back to zero once you respond. If the application has to be advertised to neighbours, the clock stops until the last notice is public.

In practice the 60-day figure is a floor, not a forecast. Objections, a request for further information or an amended plan each add time. Heritage overlay sites — common in Kew, Canterbury, Hawthorn and parts of Camberwell — usually involve more back-and-forth on the design.

How Long Is a Permit Valid Once You Have It?

Building work must start within one year of the building permit being issued, or within two years of the planning permit. Extensions are possible but must be applied for before the permit expires — miss the date and you reapply and pay again.

How Long Does Construction Take for a Custom Home?

For a high-end two-storey custom home, we program 12 to 14 months of construction. The longest single stretch is base to lock-up, at around 7 to 8 months — that is where the structure, roof, windows and external cladding all have to come together before the house is weathertight. Fixing and completion take most of the remaining time.

The construction period depends less on floor area than on decisions and long-lead items: structural steel, custom windows and glazing, stone, joinery and imported fittings. A volume builder orders from a fixed catalogue; a custom build orders things made for that house. Every one of those items not selected and confirmed before the frame goes up is a potential delay at lock-up or fixing.

What Does the Contract Have to Say About Time?

In Victoria, a major domestic building contract must state:

• a start date, or how the start date will be worked out (for example, a number of days after the building permit is issued) — and if it is not known, a statement that the builder will do everything reasonably possible to start as soon as possible
• a finish date, or the number of days needed to finish once work starts
• the number of days allowed for each type of foreseeable delay, including inclement weather

Read those numbers carefully. A contract with a short construction period and generous delay allowances can describe the same build as one with a longer period and tight allowances.

What Can an Owner Do If the Build Runs Very Late?

Under section 41 of the Domestic Building Contracts Act 1995, an owner can end a major domestic building contract if the work is not completed within one and a half times the construction period stated in the contract, where the cause was something the builder could not have foreseen when the contract was signed. The owner must give signed written notice with reasons, and is entitled to a refund of money paid less reasonable costs for work already done. Delays caused solely by the builder, and within the builder’s control, may instead be a breach of contract.

Disputes go first to Domestic Building Dispute Resolution Victoria (free conciliation), then to VCAT.

Which Delays Can an Owner Actually Prevent?

• Finish selections locked before construction, not during it. A late tile or tapware change can hold up a whole trade sequence.
• Long-lead items ordered early — steel, windows, stone and imported fittings.
• A builder involved during design, so the documentation is buildable and priced before the permit is issued. See When Should a Builder Be Involved in the Design Stage of a Custom Home?
• Variations kept to a minimum. Each one needs to be documented, priced and approved before work proceeds.