Custom buildings across greater Melbourne typically range from $3,000 to $6,000+ per square metre in 2026. Two projects both called “custom” can sit at opposite ends of that range.

Why Melbourne Costs More Than Regional Areas

Metropolitan Melbourne land values sit well above regional Victoria, and every site-specific cost scales with that premium – geotechnical testing, service connections, and planning permit fees all cost more on a Camberwell or Malvern block than on a comparable block in Bendigo or Ballarat.

Trade rates in inner and middle-ring Melbourne also run higher than in regional areas. Specialist trades like premium joinery, structural steel, and architectural glazing are concentrated around the city.

What Pushes Cost Past $4,000/m²

• Site slope and access, which add engineering and excavation work
• Heritage or neighbourhood character overlays
• 7-star energy compliance, including double glazing and heat pump systems
• Custom structural work such as cantilevers, basements, or long spans

These figures reflect Melbourne, not a national average. A generic calculator built around Perth or Adelaide pricing won’t reflect what it costs to build in Boroondara or Stonnington.

Two projects of the same size can differ by $1,000/m² once you factor in slope, overlays, and finish level. This calculator explains that gap, not just estimates it.

How Arch10’s Calculator Works

The Process

The calculator moves through the same questions a project manager asks on-site, in the order that actually shapes a quote:

• Project type: a single custom home, or a townhouse/multi-residential development
• For multi-dwelling projects, the number of dwellings and their arrangement – side by side, fully detached, or combined
• Architectural or conventional finish
• Total floor size
• Suburb or council area

Why This Isn’t a Generic Calculator

Many online calculators use one national rate and adjust for size alone. Ours doesn’t.

It accounts for the fact that a permit in Boroondara moves through a different process than one in Kingston, that a sloping block in Whitehorse costs more to build on than a flat block in Monash, and that finish expectations shift from suburb to suburb across Arch10’s service area.

Each answer refines the estimate before the next, so the final figure reflects your project rather than a single Melbourne-wide rate.

Melbourne Custom Build Costs by Finish Level

Standard Custom ($3,000–$3,500/m²)

Quality finishes and a semi-bespoke design – a floor plan tailored to your block and brief, built with solid mid-range materials and fittings. Custom in layout, not in every detail.

Premium Custom ($3,500–$4,500/m²)

High-quality finishes, bespoke joinery, and premium materials throughout – stone benchtops, feature tiling, upgraded window systems, and cabinetry built to your specification rather than pulled from a catalogue.

Luxury/Architectural ($4,500–$6,000+/m²)

Bespoke design from the ground up: architect-led floor plans, premium materials, integrated home technology, and specialist features such as pools, cellars, or home theatres built into the structure.

Finish level is one of the biggest single swings in the final figure – often larger than floor size or even suburb.

Hypothetical Example: 250m² in Boroondara

Take a 250m² premium custom home in Boroondara, where heritage overlays and established streetscapes are common. At $3,500–$4,500/m², build cost lands between $875,000 and $1,125,000, before land, permits, and professional fees. Move into luxury/architectural territory on the same floor plan, and that range climbs past $1.1 million.

Hidden Costs Nobody Talks About in Melbourne

A build quote rarely covers everything you’ll actually pay:

• Council permits and fees: $10,000–$25,000 depending on council area, covering your planning permit, the building permit levy, and inspections
• Demolition, site prep, and retaining walls: Costs rise fast on steep inner-suburb blocks
• Professional fees: Architects typically charge in the order of 8–12% of build cost, on top of separate engineer, land surveyor, and building surveyor fees
• Contingency: Budget 10–20% of build cost, in line with Victoria’s building regulator’s own guidance, to absorb design changes and price movements
• Energy compliance: Since 1 May 2024, every new Victorian home must meet a 7-star NatHERS rating, adding double glazing, extra insulation, and often solar

Inner Melbourne suburbs cost more to build in for structural reasons, not just prestige. Blocks run smaller, streets are narrower for site access, and overlays such as the heritage controls across Boroondara add both time and design constraints that most outer blocks don’t face.

None of these costs is optional or additional. Building them into your budget from day one, rather than adding them mid-project, is what keeps a fixed-price contract genuinely fixed.

Dual Occupancy: The Melbourne Investment Opportunity

Melbourne’s dual occupancy market draws two types of buyers: investors chasing rental yield on established land, and owner-occupiers building a knock-down-rebuild that keeps a parent or adult child on the same block.

Cost Per Unit

Building two dwellings costs more per square metre than one – typically $3,200–$5,500/m² per unit. Each home still needs its own kitchen, bathrooms, services, and compliance sign-off, even where a shared wall or driveway reduces some cost. Fire separation between dwellings, acoustic treatment at shared walls, and staged construction sequencing add complexity a single custom home doesn’t carry.

The Numbers on One Block

This is a modelled comparison based on the rates above, not any existing project:

• One architectural custom home at 300m², built at $4,500/m²: roughly $1.35 million, one title
• Two 220m² dwellings on the same 600m² block, at $4,500/m² per unit: a combined build cost near $1.98 million, across two titles

The outcome on your block depends on its size, zoning, and overlay controls. Two titles at completion, rather than one, is the core of the dual occupancy case for investors and owners alike.

Council Approval and Local Demand

Every dual occupancy needs a planning permit assessed under Clause 55 (ResCode). Councils have a 60-day statutory timeframe to decide, though heritage-heavy councils fielding more objections often take longer.

Boroondara, Stonnington, and Kingston see the strongest dual occupancy demand in Arch10’s service area – established suburbs with large blocks, strong resale values, and land prices high enough that splitting a block makes financial sense.

Land price is the reason those three councils lead demand. Where a single block already carries a high price tag, splitting it across two titles spreads that cost over two eventual sale or rental outcomes rather than one.

Arch10 has delivered dual occupancy and multi-residential projects across Melbourne for more than 15 years, managing the permit and construction sequencing that both side-by-side and detached builds demand.

Suburb-Specific Cost Variations (Inner Melbourne Premium)

Where you build inside Arch10’s service area changes your per-square-metre rate as much as your finish level does.

Kingston, Boroondara, and Stonnington: $3,500–$6,000+/m²

The premium tier, reflecting high land values, heritage overlays, and the bespoke expectations attached to suburbs like Toorak, Camberwell, and Beaumaris.

Glen Waverley, Box Hill, and Manningham: $3,200–$5,000/m²

Solid value – established suburbs with good transport links and strong resale value, without the heritage overlay density of the inner-eastern suburbs.

Outer Pockets of the Service Area: $3,000–$4,200/m²

You can save a lot here, offset by distance from the CBD and a lower streetscape premium built into the land price.

Council approval complexity, site access and slope, material delivery distance, and local trade availability all shift with the postcode. That’s why this calculator asks for your council area rather than applying one Melbourne-wide rate.

At the same floor size and finish level, the suburb tiers above can move total build cost by several hundred thousand dollars.

How Accurate Is This Calculator?

This calculator gives you an estimate, not a quantity surveyor’s report.

For a standard build on a straightforward block, expect the estimate to sit within ±10–15% of a later, detailed quote. For the factors the calculator can measure – floor size, finish level, and location – the numbers stay consistent. It narrows further, or widens, once we assess your specific site.

What This Tool Can’t See

• Your specific site conditions
• Whether a heritage overlay applies
• How steep your block runs
• Whether trees need removal permits
• What a neighbour’s existing wall or easement might restrict

When You Need a Formal Estimate

Use this tool to set a budget range early. Then bring your result to Arch10 for a formal, site-specific estimate before committing to a design brief.