Home Addition Price Estimates By Room Type

Common Addition Types

One Room Extension

-Bedroom / study (standard): $25,000 – $80,000
-With ensuite: $45,000 – $120,000
-Best for: quick space gain, working from home, growing family

Rear Home Extension

-Typical size: 20–50 m²
-Cost: $80,000 – $250,000+
-Includes open-plan kitchen/living/dining
-Most popular option in Melbourne suburbs

Side Return Extension

-Cost: $60,000 – $180,000
-Uses unused side setbacks (common for terrace houses)
-Great for widening narrow homes

Second Storey / Over Garage

-Over garage / partial second level: $120,000 – $300,000
-Full second storey: $250,000 – $600,000+
-Ideal when land size is limited

Basement Extension

-Cost: $300,000 – $800,000+
-Very site-dependent (soil, drainage)
-Increase level of engineering required
-High-end/luxury solution in inner Melbourne

Loft Extension

-Cost: $80,000 – $200,000
-Often used for bedrooms, studios, kids retreat

Car Spaces

-Attached brick garage: $40,000 – $80,000
-Carport: $15,000 – $30,000

Granny Flat / Bungalow

-Semi-detached granny flat: $100,000 – $300,000
-Bungalow (basic backyard studio): $70,000 – $150,000

Tailored Extensions for Growing Families

Parents Retreat

-Bedroom + luxury ensuite + WIR
-Cost: $80,000 – $200,000

 Kids Retreat

-2–3 bedrooms + lounge/study
-Cost: $150,000 – $400,000

Extra Bedrooms

-Cost: $30,000 – $100,000 per room

Home Office / Studio

-Cost: $20,000 – $80,000

Melbourne Extension Cost Guide per Square Meter

Every project is unique, but here’s what you can expect:

Small Extensions (10–25 m²)

-$30,000 – $125,000
-Bedroom, study, sunroom

Medium Extensions (25–60 m²)

-$62,5000 – $300,000
-Rear living, 1–2 rooms

Large / Luxury Extensions (60 m²+)

-$150,000 – $800,000+
-Full home transformation
-High-end finishes, architectural design

We provide transparent quotes and tailored solutions to match your budget.

Build Options to Suit Your Budget

Custom Designed & Built Extensions

Fully tailored home additions with premium finishes and architectural design.

Modular Extensions (Budget-Friendly)

Faster build times and lower costs—ideal for studios, granny flats, and simple additions.

Why Choose Us?

-Boutique Melbourne builder with personalised service
-Custom designs tailored to your lifestyle
-High-quality craftsmanship and finishes
-Transparent pricing
-End-to-end service from design to completion

Servicing Melbourne & Surrounding Suburbs

We work across Melbourne, delivering high-quality custom home extensions that blend seamlessly with your existing home.