How Much Does a 60sqm Granny Flat Cost in Melbourne? (2026 Breakdown)

Sixty square metres is the sweet spot. It’s the maximum size allowed under Victoria’s VC253 regulations without triggering a planning permit, and it’s large enough for a proper 2-bedroom layout with kitchen, bathroom, and living area. Most Melbourne homeowners researching granny flats land on 60sqm as their target — so here’s what it actually costs to build one in 2026.

The Short Answer

A turnkey 60sqm granny flat in Melbourne costs between 210,000 and 250,000+GST, depending on the model and finish level. At Backyard Oasis, our three 60sqm models are priced as follows:

Every one of those prices includes everything: design, engineering, building permit, foundation, construction, electrical, plumbing, kitchen, bathroom, flooring, painting, cladding, insulation, windows, doors, and external steps. The number we quote is the number you pay.

What Makes Up That 210K-250K?

People want to know where the money goes. Fair enough — this is a six-figure decision. Here’s a rough breakdown of how a 60sqm build cost distributes:

Design and permits (roughly 8–10% of total cost)

Architectural drawings, structural engineering, energy efficiency report, building permit application, building surveyor fees, inspections. Some builders charge this separately — 8,000-15,000 as a “pre-construction” fee. We include it in the quote.

Foundation (roughly 10–12%)

Our SureFooting pier-based system is designed for Melbourne’s reactive clay soils. It comes with a 25-year warranty. Concrete slab foundations (used by other builders) cost similarly but don’t adapt as well to site movement over time. Foundation cost varies with soil class and slope — flat blocks on stable ground are cheaper than sloping sites on reactive clay.

Structure and frame (roughly 25–30%)

Steel frame, wall panels, roof structure, external cladding, Colorbond roofing, gutters, downpipes. This is the biggest single component. Our prefab construction process means the frame and panels are manufactured in our Carrum Downs factory under controlled conditions, which reduces waste and improves quality consistency.

Electrical and plumbing (roughly 12–15%)

Switchboard, wiring, GPOs, lighting, TV points. Hot water system. Kitchen plumbing, bathroom plumbing, sewer and stormwater connections to mains. This is where some builders catch you — advertising a base price that excludes connections. Connecting to mains sewer alone can cost 5,000-12,000 if your builder treats it as an extra.

Kitchen and bathroom (roughly 15–18%)

Cabinetry, benchtops (laminate on the Lumina, stone on the Verde), sink, cooktop, rangehood. Bathroom tiling, shower screen, toilet, vanity, tapware. The gap between a budget fit-out and a premium one is roughly 7,000-12,000. The Verde’s gourmet kitchen with stone benchtops and 900mm cooktop is why it’s priced $20K above the Lumina.

Internal finishes (roughly 8–10%)

Plaster, paint, architraves, skirting, flooring (laminate or hybrid throughout, carpet to bedrooms). Double-glazed aluminium windows and doors with fly screens. Insulation to achieve the minimum 6-star energy rating.

External and site works (roughly 5–8%)

Steps and landing, external painting, site reinstatement, basic landscaping. On some sites, this also includes access works (crane hire if side access is tight) or retaining walls on sloping blocks.

Why Advertised Prices from Other Builders Can Be Misleading

We regularly see Melbourne granny flat builders advertising 140,000-180,000 for a 60sqm build. Then the extras appear:

• Sewer connection: 5,000-12,000
• Electrical connection to mains: 3,000-6,000
• Hot water system: 2,500-4,000
• Site survey and soil testing: 2,000-4,000
• Council fees and permits: 2,000-5,000
• Landscaping and reinstatement: 3,000-8,000
• Concrete pathways: 1,500-3,000
• Crane hire: 3,000-8,000

Add those up. A 150K advertised price becomes 180K–210K+ once the real scope is revealed. At that point, you’re paying a similar amount for a lower-quality build.

If you’re comparing quotes, ask every builder: “Is this the total I will pay on handover day, with no additional invoices?” If they hesitate, you have your answer.

For a full comparison of what Backyard Oasis includes versus what others charge extra, see our complete granny flat cost Melbourne guide.

Is a 60sqm Granny Flat Worth the Extra Over a Smaller Build?

A 1-bedroom Lumina 32 starts at 165,000. A 60sqm Lumina starts at 210,000. That’s a $45,000 difference. Is it worth it?

The rental data says yes, in most cases. A 60sqm 2-bedroom granny flat in Melbourne’s south-east rents for 400-520/week. A 32sqm studio rents for 280-350/week. That’s 120-170/week more in rent — roughly 6,200-8,800 per year. The $45K premium pays for itself in additional rental income within 5–7 years. After that, it’s pure upside.

Two bedrooms also attract a wider tenant pool (couples, small families, sharers) and have lower vacancy rates than studios. If you’re building for investment, 60sqm is almost always the better financial decision.

If you’re building for a single parent or retired family member who values a compact space, a 45sqm Lumina at $185K might be the right fit. But if the granny flat will ever be rented — even years from now — go to 60sqm.

What About Ongoing Costs?

Once the granny flat is built, the ongoing costs are modest:

• Insurance: Add the granny flat to your existing home and contents policy. Typically 300-600/year extra.
• Maintenance: Steel-framed, Colorbond-roofed, Weathertex-clad buildings require minimal maintenance. Budget 500-1,000/year for minor repairs and repainting every 10–15 years.
• Council rates: Your property rates may increase slightly to reflect the added dwelling. Varies by council — typically 200-500/year.
• Utilities: If separately metered (recommended for rentals), the tenant pays their own electricity and water. If shared with the main house, budget accordingly.

Frequently Asked Questions

How much does a 60sqm granny flat cost in Melbourne in 2026?

210,000-250,000+GST for a turnkey build. Backyard Oasis offers three 60sqm models: Lumina 60 from 210K, Serene 60 from 220K, Verde 60 from $230K. All prices are all-inclusive.

What’s included in a 60sqm granny flat price?

At Backyard Oasis: everything. Design, engineering, building permit, foundation, construction, electrical, plumbing, kitchen, bathroom, flooring, painting, cladding, insulation, windows, doors, and steps. No extras.

Is 60sqm big enough for 2 bedrooms?

Yes. Our Verde, Serene, and Lumina 60 models all fit two bedrooms with built-in robes, an open-plan living/kitchen area, and a full bathroom. The layout is comparable to a compact 2-bedroom apartment.

Can I build a 60sqm granny flat without a planning permit?

In most cases, yes. Under Victoria’s VC253 amendment, properties over 300sqm can build a Small Second Dwelling of 60sqm or less without a planning permit. You still need a building permit, which we handle.

Get an exact price for a 60sqm granny flat on your block. Tell us your address, and we’ll send you a fixed-price, no-variation quote within 48 hours.