Home Extensions in Melbourne — From Ground Floor to Second Storey
Konntey Home & Renovations delivers professional home extensions across Melbourne — from single-room additions to full second storey builds and knockdown rebuilds. BPC registered, council approvals handled, and fixed-price contracts on every project. Serving Tarneit, Point Cook, Werribee, Hoppers Crossing, Dandenong & beyond.
How much does a home extension cost in Melbourne?
Home extension costs in Melbourne vary from $1,800 to $4,500+ per square metre depending on the type of extension, structural complexity, and finishes. A standard ground floor extension typically starts around $150,000–$250,000 for 50–80sqm. Second storey additions run higher due to structural engineering requirements. All our quotes are fixed-price — no cost blowouts.
Extension Types
Ground Floor Extension
Expand your living space outward — open-plan living, extra bedrooms, or larger kitchen areas
Second Storey Addition
Build up when you can't build out. Full second storey additions with minimal disruption
Granny Flat / DPU
Dependent person's unit or rental income — fully self-contained, council-approved builds
Knockdown Rebuild
Start fresh on your existing block with a brand new custom-designed home
Garage Conversion
Transform an underused garage into a functional living space, home office, or studio
Our Build Process
Free consultation
Site visit, discuss your vision, assess feasibility
Design & permits
Architectural plans, council submissions, and fixed-price quote
Site preparation
Demolition if needed, excavation, and foundation work
Structural frame
Timber or steel frame erected, roofing installed
Lock-up stage
External cladding, windows, doors — weather-tight
Internal fit-out
Plumbing, electrical, plastering, flooring, painting
Finishing & fixtures
Kitchen, bathroom, cabinetry, and final touches
Handover & warranty
Final inspection, compliance certificate, full walkthrough
Pricing Guide
Prices vary based on site conditions, structural requirements, material selections, and council overlay zones. All quotes are fixed-price with transparent line-item breakdowns.
What Our Clients Say
“Konntey added a second storey to our Tarneit home. They handled all the council approvals and the build was completed on schedule. Our home feels brand new.”
“We needed more space for our growing family. Konntey extended our ground floor with a new master suite and open-plan living. Couldn't be happier.”
“Built a granny flat in our backyard in Werribee. The team managed everything from permits to final handover. Professional and fair pricing.”
Frequently Asked Questions
Ready to extend your home?
Get a free, fixed-price quote from Melbourne's BPC registered extension builders.