How Much Does a Garage Conversion Cost on the Gold Coast?
What it actually costs to convert a Gold Coast garage into a usable room in 2026 - the difference between a simple rumpus conversion and a compliant habitable room, and the approval, insulation and floor level items that catch people out.
A Gold Coast garage conversion typically costs $15,000-$28,000 for a basic non-habitable rumpus or storage room, $28,000-$50,000 for a compliant habitable room such as a bedroom or home office, and $50,000-$85,000+ where a bathroom, kitchenette or full slab and drainage work is added.
- Basic rumpus / studio
- $15,000 - $28,000
- Compliant habitable room
- $28,000 - $50,000
- With bathroom or kitchenette
- $50,000 - $85,000+
- Typical duration
- 3 - 8 weeks
Overview
A garage is the cheapest floor area you will ever add to a house, because the slab, walls and roof already exist. That is why conversions are popular across the Gold Coast - a fourth bedroom, a home office or a teenager's retreat for a fraction of the cost of extending. The cost turns on one question: does the room need to be habitable? A non-habitable rumpus or storage room has far lighter requirements. A habitable room - bedroom, office you intend to declare, or anything with a bed in it - has to meet ceiling height, ventilation, natural light, egress, insulation and often fire separation requirements, and that is where the approval and construction costs step up. For the service see garage conversions.
What's included
- Assessment of ceiling height, slab level and existing structure
- Building approval through a private certifier where required
- Removal of the garage door and infill framing
- New window or sliding door for light and ventilation
- Insulation to walls and ceiling, and vapour management
- Wall and ceiling linings, cornice, skirting and architraves
- Levelling or building up the slab where it falls to the driveway
- Electrical - lighting, power, data, and air-conditioning provision
- Flooring, painting and final finishes
- Termite management and weatherproofing at the new external wall
Habitable versus non-habitable is the whole conversation
A non-habitable conversion - a rumpus, gym, workshop or storage room - is largely a lining, insulation and finishing job. A habitable room has to satisfy minimum ceiling height, natural light and ventilation as a proportion of floor area, an egress path, energy efficiency requirements and, in attached garages, fire separation from the rest of the dwelling. Most Gold Coast garages can be made compliant, but not all. Low ceiling heights in 1970s and 1980s brick homes are the most common blocker. We check that first, before you spend money on design.
The slab problem nobody mentions
Garage slabs are poured with a fall toward the door so water runs out. That fall is typically 30-80mm across the space, and it is very obvious once the room has furniture and flooring in it. Fixing it means either a self-levelling screed, a topping slab, or a battened and sheeted timber floor built over the concrete. Each has different cost and ceiling-height implications - a timber floor is often cheapest but eats 70-100mm of head height, which can push a marginal ceiling below the habitable minimum. This is the single most common reason a conversion quote comes in above what a client expected.
Parking, resale and council
Converting the only covered parking space on a property can affect approval in some Gold Coast areas, and it affects resale. Buyers on the Gold Coast expect at least one secure park. Where possible we keep a carport or tandem space, or design the conversion so the garage door opening is retained visually and could be reinstated. We raise this at quote stage rather than after. If the conversion would hurt the property's value more than the extra room adds, that is worth knowing before you commit.
Heat is the other coastal factor
An unconverted garage is a hot box - uninsulated masonry, a west-facing door and no ceiling insulation. Converting it without properly insulating the walls and ceiling produces a room nobody uses between November and March. We treat insulation, ceiling ventilation and a correctly sized split system as core scope, not optional extras. It adds $4,000-$9,000 and it is the difference between a spare room and a usable one.
Garage conversion cost ranges - Gold Coast 2026
Prices below are indicative Gold Coast ranges for 2026, based on the jobs we quote. They are a planning guide only - the written fixed-price quote follows a site inspection, because access, existing structure and the condition behind the linings move the number more than anything else.
| Conversion type | Indicative range | Typical duration |
|---|---|---|
| Basic rumpus / gym, non-habitable | $15,000 - $28,000 | 3 - 4 weeks |
| Home office or studio, insulated and air-conditioned | $22,000 - $38,000 | 4 - 6 weeks |
| Compliant habitable bedroom | $28,000 - $50,000 | 5 - 8 weeks |
| Habitable room plus ensuite or bathroom | $50,000 - $75,000 | 6 - 10 weeks |
| Self-contained studio with kitchenette | $65,000 - $85,000+ | 8 - 12 weeks |
Individual cost items
| Item | Indicative cost | Notes |
|---|---|---|
| Building approval / private certifier | $1,200 - $3,000 | Change of classification for habitable rooms |
| Garage door removal and wall infill | $3,500 - $7,500 | Includes new window or door opening |
| Slab levelling or build-up | $2,000 - $8,000 | Garage slabs usually fall toward the driveway |
| Insulation to walls and ceiling | $1,500 - $4,000 | Essential in the Queensland climate |
| Linings, cornice, skirting | $4,000 - $9,000 | Depends on area and ceiling height |
| Electrical and lighting | $2,000 - $5,000 | More if a subboard is needed |
| Air-conditioning | $2,500 - $5,000 | Supply and install of a split system |
| Flooring | $1,800 - $6,000 | Hybrid, timber, carpet or tile |
| Bathroom or ensuite addition | $18,000 - $30,000 | Drainage, waterproofing, fit-out |
Check these before planning a garage conversion
- Measure the floor-to-ceiling height at the lowest point
- Measure the fall across the slab from the back wall to the door
- Note whether the garage is attached to or detached from the house
- Check where the switchboard, hot water system and meter sit
- Decide whether the room needs to be legally habitable
- Confirm whether you will still have a covered park
- Check for existing dampness at the slab edge or base of walls
Why choose Orange Projects
Licensed and insured
Orange Projects holds QBCC Licence No. 15620733 and carries the insurance needed for our work.
Local experience
We understand Gold Coast homes, coastal conditions and the practical details that affect local building work.
Clear written quotes
You receive an itemised quote after we inspect the site and confirm the scope.
Careful workmanship
Our carpenters and trade partners focus on solid work, clean details and a tidy site.
One point of contact
We coordinate the work and keep you informed from the first visit through to handover.
Straight answers
We explain the work, timing and decisions in plain language.
Suitable materials
We choose materials that suit the job and local weather conditions.
Workmanship support
We stand behind our work and explain the warranties that apply to your project.
Our process
- 1
Site inspection
We attend the property, inspect the actual condition rather than working from photos alone, and talk through what you want the finished result to be. Bring any reports, strata approvals or insurance paperwork you already have.
- 2
Written fixed-price quote
You receive an itemised quote covering labour, materials, rubbish removal and any engineering or certification required. Where the full extent of damage can only be confirmed once linings or decking boards come off, we say so up front and quote the investigative stage separately rather than hiding it in an allowance.
- 3
Approvals and scheduling
Where certification, an engineer's design or body corporate approval is needed, we organise it and book the works into a dated program so you know which days we are on site.
- 4
Carry out the works
Protected floors, dust control, tidy site each afternoon and photo updates as we go. Occupied homes, tenanted properties and trading businesses are all worked around rather than shut down where possible.
- 5
Handover
Final walkthrough, defect check, invoice and any documentation - engineering certificates, Form 16s, product warranties - handed over with the job.
Areas we service on the Gold Coast
Servicing the Gold Coast and Logan, including these Gold Coast areas:
- Robina
- Burleigh Heads
- Mermaid Waters
- Helensvale
- Hope Island
- Coomera
- Southport
- Broadbeach
- Palm Beach
- Miami
- Varsity Lakes
- Ashmore
We also service Logan:
Frequently asked questions
How much does it cost to convert a garage on the Gold Coast?
Most conversions land between $15,000 and $50,000 in 2026. A basic non-habitable rumpus sits at the lower end; a compliant bedroom with insulation, a new window, levelled floor and air-conditioning sits at the upper end.
Do I need council approval to convert my garage?
For a habitable room, almost always - it is a change of use and classification, generally handled through a private certifier. A non-habitable storage or rumpus conversion may not need approval, but it depends on the work. We confirm the path at quote stage.
Can any garage be converted into a bedroom?
No. Ceiling height is the usual limiting factor, along with natural light and ventilation openings and, for attached garages, fire separation. We measure and check compliance before quoting rather than discovering it later.
How long does a garage conversion take?
Three to four weeks for a basic conversion and five to eight weeks for a compliant habitable room, plus two to six weeks beforehand for design and approval.
Will converting the garage hurt my resale value?
It can, if it removes the only secure parking. In most cases an extra usable room adds more than it costs, but on a small block with no alternative parking it is a genuine trade-off. We will give you a straight opinion.
Do you handle the approval?
Yes. We coordinate the certifier, the required documentation and any energy efficiency reporting, and hand over the certificates with the completed job.