Garage Conversion Granny Flats Melbourne
Convert your existing solid garage structure into a comfortable, fully compliant living space.
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Overview
If you have a large, structurally sound brick or solid timber garage that is currently just gathering dust or storing junk, a garage conversion is a brilliant way to create a granny flat without sacrificing any of your open backyard space. Melbourne Granny Flats specializes in transforming cold, concrete garages into warm, fully compliant, and beautifully finished living spaces. This is an incredibly efficient way to add a secondary dwelling, utilizing the existing footprint of your property to create high-value living accommodation.
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Speak with our Melbourne team today to see what's possible on your block.
Get a Free Granny Flat QuoteWhat This Service Includes
A garage conversion is a comprehensive renovation process. The service includes assessing the existing structure for compliance, managing the building permits required to change the building's classification to a habitable dwelling, and executing the build. The construction involves raising or sealing the concrete floor to prevent moisture, installing extensive wall and ceiling insulation, cutting new openings in brickwork for windows and doors, framing internal walls, running all new plumbing and electrical lines, and completing the internal fit-out with a new kitchen, bathroom, and living area.
Best Suited For
This service is ideal for homeowners with large existing garages, sheds, or outbuildings who want to add living space without reducing their garden size. It is perfect for creating a teenager's retreat, a home office, a studio for a home business, or a compact rental unit. It is also a great option for those looking for a potentially faster build process by utilizing an existing structural shell rather than building from the ground up.
Design Considerations
Converting a garage isn't as simple as throwing down some carpet and painting the walls. We must design clever layouts to work within the existing fixed footprint, which is often long and narrow. We focus heavily on bringing in natural light by cutting large window openings or installing skylights, as garages are typically dark. The removal of the main garage roller door presents an opportunity to install a large glass sliding door or a feature wall with expansive windows, completely transforming the facade.
Need help with the design?
Our architectural team handles everything from concept to council approval.
Book a Free Site AssessmentSite & Property Considerations
The existing structure MUST be legally approved by council and structurally sound. We will assess the concrete slab to ensure it has a proper moisture barrier (often lacking in old garages). Crucially, we must check the ceiling height—habitable rooms in Victoria require a minimum ceiling height of 2.4 metres. If the roof is too low, we may need to alter the roof structure, which significantly increases costs. We also assess how easily we can run plumbing from the garage to your main sewer line.
Key Benefits
- Preserves your existing open backyard space and garden
- Often faster than a brand new ground-up build
- Environmentally friendly by repurposing an existing structure
- A highly effective way to utilize an oversized, empty garage
- Can blend seamlessly with the existing house architecture
- Adds significant habitable square meterage to your property value
Cost Factors
While you save money on building a new frame and roof, garage conversions require significant work to make them legally habitable. Costs include raising or waterproofing the slab, installing extensive thermal insulation, cutting structural brickwork for windows, and the complex task of running new plumbing lines through or under existing concrete. If the roof needs to be raised to meet the 2.4m height rule, the costs will approach that of a new build.
Our Simple Process
Enquiry
Initial chat about your goals.
Property Review
Desktop check of zoning.
Site Check
Physical backyard assessment.
Design Consultation
Custom floor plan creation.
Quote
Fixed-price contract provided.
Approvals
We manage council permits.
Construction
Build by licensed trades.
Handover
Keys and compliance certificates.
Other Services
Melbourne Wide Service
We build across the western, northern, eastern, and south-eastern suburbs.
View Areas We Serve →Frequently Asked Questions
Common questions about this service.
Is it always cheaper to convert a garage than to build new?
It is often slightly cheaper, but not always. If the garage requires major structural reinforcement, a completely new slab due to moisture issues, or raising the roof to meet the 2.4m height rule, building a new detached flat might actually be more cost-effective.
Do I need council approval to live in my converted garage?
Yes, absolutely. You must obtain a building permit to legally change the 'Class' of the building from a non-habitable outbuilding (Class 10a) to a habitable dwelling (Class 1a). Living in an unapproved garage is illegal and voids insurance.
My garage is solid double brick. Can you put windows in?
Yes, our trades can safely cut openings in existing solid brickwork and install structural steel lintels to support the load above the new windows and doors, bringing in much-needed natural light.
What happens to the large garage roller door?
We typically remove the roller door entirely and replace it with a timber-framed wall featuring a large window, a glass sliding door, or French doors, clad on the outside to match the rest of the building.
How do you handle plumbing in an existing concrete slab?
We usually cut channels into the existing concrete to run the new sewer and water lines for the kitchen and bathroom, then re-concrete over them. Alternatively, we can build an elevated timber floor over the slab to run services underneath.
Can I convert half the garage and keep the rest for parking a car?
Yes, if the garage is large enough. We can build a structurally sound, fire-rated dividing wall, creating a comfortable living space on one side and retaining a functional parking or storage space on the other.
Will a conversion feel cold and damp like a normal garage?
No. We install extensive thermal insulation in the walls and ceiling, and ensure the floor is properly sealed and covered, making it as warm, dry, and comfortable as any modern home.
Speak With a Melbourne Granny Flat Specialist
Contact us today to arrange a free site assessment and discover what's possible in your backyard.