Can I convert my garage into a granny flat?
Jessica Wood
Updated on January 15, 2026
Now, the easiest and most affordable way to convert your garage to a granny flat is to convert the existing structure as it is. That means keeping all the exterior walls intact and not expanding it. With this type of conversion, you can typically expect to spend around $75,000.
Do I need permission to convert my garage?
Planning permission is not usually required to convert your garage into additional living space for your home, providing the work is internal and does not involve enlarging the building.Can I turn my garage into a granny annexe?
If you've got a detached garage, you are very likely to need to apply for a Change of Use to turn it into a granny annexe, whereas attached garages can often be converted under Permitted Development Rules.How much does it cost to convert a garage to livable space?
A garage can be turned into a simple bedroom or living space for as little as $5,000, but if you require plumbing for a bathroom or kitchen, the project can cost closer to $25,000.Do you need council approval for garage conversion in Qld?
Do I Need Council Approval? In short the answer is Yes, for any alterations or additions to your building or property. Gold Coast City Council however only require approval from a building certifier. Many garages have been completed without council approval.What You Need To Know About A Granny Flat Garage Conversion
Is it illegal to live in a garage Qld?
The simple answer is no, because under Australia's national construction code, a garage isn't built as a “habitable” area, but rather to house vehicles.What can I build without council approval Qld?
When you don't need building approval
- a small tool shed (subject to requirements in Schedule 1), stable or similar up to 10m2, other than in a tropical cyclone area.
- a 1m high retaining wall (if no loads are imposed above it, such as a building or driveway)
Do you have to raise the floor in a garage conversion?
Raise the FloorIt's true. So if you're going to convert your garage into a living space, you'll need to raise the floor first. Raising the floors of your garage also allows you to insulate them.
How do you insulate a garage for living?
There are a couple of options when it comes to insulating the garage floor: You can cover the floor with rigid foam insulation or install wood sleepers on the garage floor and install rigid foam panels between the sleepers. Use a vapor barrier. Use six-millimeter polyethylene (plastic sheeting).How do I make my garage a livable space?
How to Make a Garage Conversion a Comfortable Space
- Insulate the Walls. Most garage walls and ceilings are not insulated. ...
- Raise the Floor Height. Garages tend to be built lower than the house. ...
- Install Floor Covering. ...
- Install New Drywall or Finish Existing Drywall. ...
- Replace or Insulate the Garage Door.