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
Lifestyle & Living Space Additions
Open Plan Living Extension
-Cost: $120,000 – $350,000+
-Kitchen + dining + living/rumpus
-Most value-adding upgrade
Sunroom / Conservatory
-Sunroom: $35,000 – $70,000
-Conservatory (glass): $50,000 – $120,000
Alfresco / Outdoor Entertaining
-Cost: $15,000 – $80,000
-With outdoor kitchen: $40,000 – $150,000
Pool House
-Cost: $80,000 – $250,000+
Front Porch / Verandah
-Cost: $15,000 – $50,000
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
Budget-Friendly Option: Modular Extensions
Why clients choose modular:
-Built off-site
-Faster build time
-Lower labour costs
-Less disruption
Typical cost:
-$50,000 – $200,000 depending on size & finish
Best for:
-Granny flats
-Studios
-Extra bedrooms
-Home offices
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.
Additional Costs to Factor In
-Design & drafting: $5,000 – $25,000
-Planning permits (if required): $2,000 – $10,000
-Engineering: $3,000 – $15,000
-Site costs (demolition, excavation): highly variable
Designed for Growing Families
We tailor every extension to suit your needs:
-Parents retreat with luxury ensuite & walk-in robe
-Kids retreat with bedrooms and study space
-Open-plan kitchen, dining & living areas
-Extra bedrooms for a growing household
-Home office or creative studio
-Pool houses and outdoor entertaining zones
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.