How much does a garage conversion cost?

Price guide

$6,000 - $40,000







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How much does a garage conversion cost?

If you need more space in your home, converting your garage into a new room is an economical choice. After all, you get to skip the hassle and expense of building a house extension or buying a new home.

Various things can be done in garages. It can be converted into a new bedroom, an additional kitchen or bathroom, or an entertainment area. On average, garage conversion costs around $6,000 to $15,000. This could go as high as $40,000 depending on the type of garage, the type of room it will be converted into, and many other factors.

If you want to know more about the average cost of garage conversion and the top things you need to consider before starting a project, we have created a comprehensive price guide. This will help you save time browsing through tons of pages while helping you understand the whys behind each service. Read on to learn more about garage conversion costs in Australia.

Factors that affect garage conversion costs

Numerous factors affect how much a garage conversion costs. The final costs can double depending on the type of room your garage will be converted into and the adjustments, installation, and labour needed to complete the job. To help you understand these further, we discussed each of these points below.

Type of room to be converted into

The costs of converting your garage differ according to the type of room you want to transform it into. Costs can quickly escalate and reach around $25,000 when converting a space to a kitchen or bathroom since these types of rooms need additional plumbing to get clean, flowing water in.

Don’t be fooled, though. Bedroom and living room costs could also go higher depending on the design, style, and finishing, especially if you hire a floor planner or designer. Keep these in mind while finalising your budget.

Type of room


Simple bedroom

$5,000 to $10,000

Living room

$5,000 to $10,000

Kitchen conversion

$6,000 to $25,000

Granny flat

$5,000 to $25,000


Starts at $6,000

Home office

Starts at $5,000

Depending on your needs, you are free to choose whatever type of room your garage will be converted into. Just make sure that the new space follows building regulations and other safety measures.

Building and structure costs

The cost to convert a garage would also depend on the complexity of the project. This means checking the current state of your existing garage and taking note of the alterations and installations needed in the doors and windows, flooring, ceiling, lighting and plumbing, to name a few. To give you more idea on the estimated costs per each element, see below:

Garage conversion elements



$1,000 to $1,500


$1 per square foot of wall and floor or $650 for a 60 square metre space

Interior walls

$1,700 to $2,000

Flooring (luxury vinyl, carpet, laminate, or cement)

$1,500 to $4,500


$1,000 for a basic window

*Egress window costs around $3,500


$40 to $70 per hour

Storage cabinets

Starts at $1,000

Heating and cooling

$500 to $2,000

Electrical wiring

$50 to $100 an hour


$300 to $1,800

Phone or internet connection

$300 to $500

Additionally, if you plan to get professional design advice, the design fees of architects typically range from $2,000 to $11,000.

Benefits of garage conversion

Now that you’re familiar with the factors that affect costs, let’s discuss the benefits of garage conversion. Converting your garage creates more liveable space in your home while saving up on house extension costs. It also frees up space inside your home to avoid overcrowding while making more use of a’ junk room’. Lastly, it increases property value and can also help add more utilities to your home (entertainment room or mini office).

DIY vs hiring a professional

If you want to save up on costs and DIY some parts of your garage conversion project, prepare to do lots of heavy lifting, measuring, and planning. Each detail should be exact so as not to waste the resources needed. In some states, you will also need to apply for various permits such as a Construction Certificate and an Owner-Builder Licence.

However, if you don’t have the luxury of time and energy and want to seek the help of professionals, there are numerous benefits to hiring them.

First, they know various high-risk installations such as electrical wiring, plumbing, and heating mechanisms. Second, they have years of training in house remodelling and installation and can guarantee a quality output that can last decades of wear and tear. They are used to doing heavy lifting, materials sourcing, and waste disposal. Lastly, they are experts on the fire, safety, and building regulations that need to be followed, permits to be applied, and permissions required per area.

If you are ready to move forward with your garden conversion and remodelling project, then skip looking for garage conversion cost calculators online. Put up a task on our Airtasker and get personalised quotes from a host of tradesmen near your area. Your newly remodelled space is now within reach!


How much does a garage conversion to a granny flat or studio cost?

Garage conversion to a granny flat costs around $5,000 to $25,000 but can go higher or lower depending on the size of the space, location, and complexity of the project. Garage to studio conversion cost is similar to granny flats since these both fall into garage to loft remodelling. Other factors that affect the cost of a granny flat conversion include permits ($1,000), insulation and drywall ($2,000), air conditioning ($2,000), and electricity ($300). But before getting anything started, the granny flat must follow the National Construction Codes – Building Code of Australia (NCC BCA) and comply with the Residential Development Local Planning Policy requirements. The guidelines include: minimum floor to ceiling height of 2.4m, proper waterproofing and plumbing done by a plumber or drainage expert, proper power, lighting, air conditioning, stove, and phone installation done by a licensed electrician, having an adequate flow of natural light and ventilation, smoke detectors installed in all rooms, and existing power metre box moved to an external wall. Following these guidelines makes sure your project runs smoothly and seamlessly.

Do I need to hire an architect for my garage conversion project?

Having an architect to design your space will beautify it and increase its monetary value if you plan to put the house up on the market. They can also help you in navigating through building permits and planning permissions if needed. However, this is not compulsory and will depend on your needs and goals for your home space.

Do I need a building permit or planning permission to remodel my garage?

A building permit is needed in conversion projects since you will be changing the usage of your home space. Applying for a permit ensures that the new space complies with building regulations and that the safety of inhabitants and the surrounding area is preserved. The application starts with submitting plans to your city’s Zoning Department. An architect or a building designer can help you navigate through the overall process. The cost of the permit ranges from $1,000 to $5,000, depending on the state. It’s best to consult with your local authority regarding practices and fees to make sure you know the rules governing your area.

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