Quick Answer
Building a garage in Melbourne costs $18,000–$60,000+ in 2026 depending on size, materials, and finish. A single garage (3m×6m) costs $18,000–$35,000 supplied + built. A double garage (6m×6m) runs $28,000–$55,000. A triple garage (9m×6m) $45,000–$75,000. Adding a granny flat / studio above roughly doubles the cost ($85,000–$160,000 total). A council building permit is required for any garage over 10m² in Victoria. Most builds take 6–12 weeks from permit issue to lock-up.
Complete Cost Breakdown
Cost by Garage Size and Type
| Garage Type + Size | Supplied + Built | Typical Inclusions |
|---|---|---|
| Single garage (3m×6m) — Colorbond kit | $18,000–$25,000 | Slab + frame + roller door + 1 personal door |
| Single garage (3m×6m) — brick veneer | $26,000–$35,000 | Slab + brick walls + tile roof + 2 doors |
| Double garage (6m×6m) — Colorbond | $28,000–$42,000 | Slab + frame + 2 roller doors + window |
| Double garage (6m×6m) — brick veneer | $38,000–$55,000 | Brick + Colorbond roof + 2 sectional doors |
| Triple garage (9m×6m) — Colorbond | $42,000–$58,000 | Larger slab + 3 roller doors + ventilation |
| Triple garage (9m×6m) — brick veneer | $55,000–$75,000 | Full bricks + Colorbond/tile + 3 sectional |
| Garage with apartment / studio above | $85,000–$160,000 | Add 1-bedroom dwelling, plumbing, electrical, council DA |
| Detached workshop garage (6m×9m) | $45,000–$70,000 | Higher ceiling, 3-phase power, concrete pad |
Cost Breakdown by Component
| Component | Cost | Notes |
|---|---|---|
| Site preparation / excavation | $1,500–$5,500 | Depends on slope, soil type |
| Concrete slab (per m²) | $120–$220 | Includes reinforcement, formwork |
| Frame (timber or steel) | $3,500–$8,500 | Steel slightly more, longer span possible |
| Brick or block walls | $220–$380 per m² | Bricks + labour for veneer construction |
| Colorbond cladding | $60–$110 per m² | Wall sheets + flashings + fixings |
| Roof (Colorbond) | $80–$140 per m² | Sheets + trusses + insulation |
| Roof (concrete tile) | $110–$180 per m² | Heavier; needs stronger trusses |
| Roller door (single) | $1,200–$2,400 | Manual or motorised |
| Sectional door (single) | $1,800–$3,800 | Quieter, better insulation |
| Personal door + frame | $450–$900 | Side access door |
| Window (1.2m×0.9m) | $280–$650 | Aluminium frame standard |
| Electrical rough-in + 4 outlets | $1,800–$3,500 | Licensed electrician + permit |
| Plumbing (if including sink/toilet) | $3,500–$8,000 | Licensed plumber + Council |
| Council building permit | $450–$1,200 | Permit fee + assessment |
| Planning permit (if needed) | $1,500–$4,500 | Required if outside DCP standards |
| Engineering certification | $650–$1,500 | Required for slab + frame |
| Insurance (during build) | $300–$650 | Domestic Building Insurance |
Permit Costs and Requirements (Victoria 2026)
| Garage Size / Type | Permit Required? | Cost |
|---|---|---|
| Under 10m² (small shed) | No permit needed | — |
| 10–40m² single garage | Building permit only | $450–$900 |
| 40–60m² double garage | Building permit + may need planning | $650–$2,500 |
| Over 60m² or two-storey | Building + planning permit | $2,000–$5,500 |
| Garage in heritage overlay area | Heritage permit + building permit | $2,500–$6,500 |
| Garage near or over easement | Building permit + utility approval | $1,200–$3,500 |
What Affects Garage Build Cost
1. Wall Material (Brick vs Colorbond)
Colorbond / steel garages are the cheapest option ($18,000–$30,000 for single, $28,000–$45,000 for double). Brick veneer adds $8,000–$15,000 to a single, $12,000–$20,000 to a double, but matches existing weatherboard or brick homes and adds 5–10% more to property value.
2. Roof Type
Colorbond roof is standard at $80–$140/m². Concrete tile roof matches existing tile homes but adds $30–$50/m² plus stronger trusses. Don’t underestimate roof load — tile garages need engineering-certified frames.
3. Door Type
Standard roller doors are cheapest ($1,200–$2,400 single). Sectional doors look better, insulate better, and run quieter but cost 50–80% more. Tilt doors are between, manual or motorised. For a double garage, two single doors offer flexibility but two sectionals look more modern.
4. Slab Size and Site Conditions
A flat block with no rock takes a slab in 1 day. A sloping block needs cut-and-fill, retaining, or stepped foundations — add $3,000–$8,000. Rock requires excavation rates of $200–$450 per cubic metre.
5. Electrical and Plumbing
Basic electrical (5 outlets, lighting) is $1,800–$3,500. Adding sink + toilet for workshop / studio use needs licensed plumbing ($3,500–$8,000) plus Council connection fees. 3-phase power for workshop equipment adds $1,500–$3,500.
6. Insulation and Finishes
Unlined Colorbond walls/roof are cheapest but condensation-prone. R2.0 wall insulation + R3.5 roof insulation adds $1,500–$3,500. Plastered linings for habitable workshop add $4,500–$9,000. Painted internal walls add $1,200–$2,500.
7. Council Permit Path
Most metropolitan Melbourne councils accept ResCode-compliant garages with building permit only (faster, $450–$900). Garages exceeding boundary setbacks, lot coverage, or visual amenity provisions need planning permit (4–12 weeks longer + $1,500–$4,500).
8. Add-Ons (Apartment / Studio / Workshop Above)
Garage with a studio/granny flat above (legally a “Dependent Person’s Unit” under Victorian planning rules) roughly doubles the cost. Expect $85,000–$160,000 total — full bathroom, kitchen, separate entry, additional planning permits, sewer connection, fire separation. Often more cost-effective than separate granny flat.
Double Garage Cost Melbourne — Dedicated Breakdown
A standard double garage (6m×6m / 36m²) is the most common new build size in Melbourne in 2026 — large enough for two cars plus a workshop bench or storage. Here’s the dedicated breakdown for double-garage builds.
Double Garage Cost by Build Type
| Build Type (6m × 6m / 36m²) | Total Supplied + Built | What’s Included |
|---|---|---|
| Basic Colorbond kit, DIY-assist | $18,000–$26,000 | Slab + frame + Colorbond cladding + standard roller door + permit. No insulation or lining. |
| Standard Colorbond, turnkey | $28,000–$42,000 | Above + sectional door + 1 PA door + power + lights + 1 window |
| Brick veneer to match house | $42,000–$58,000 | Brick walls + Colorbond or tile roof + matching trim + sectional door + power |
| Premium with insulation + lining | $48,000–$68,000 | Above + R3.5 insulation + plasterboard lining + epoxy floor + remote sectional door |
| Heritage-area build (Carlton, Fitzroy) | $55,000–$85,000 | Above + heritage facade compliance + slate or terracotta roof |
Double Garage Cost by Component
| Component (for 6m×6m) | Cost | Notes |
|---|---|---|
| Concrete slab (36m², reinforced) | $6,500–$11,500 | $180–$320/m² including excavation, reo, pump |
| Wall frames (steel) | $4,500–$7,500 | Steel portal frame, more durable than timber |
| Wall frames (timber) | $3,500–$5,500 | Pine treated, cheaper but more maintenance |
| Colorbond wall cladding | $2,800–$4,500 | Standard colours, includes flashings |
| Brick veneer cladding | $8,500–$14,500 | To match house, includes bricklayer labour |
| Colorbond roof (with sarking) | $3,200–$5,500 | Includes sarking, ridge, gutters, downpipes |
| Sectional roller door (standard, manual) | $1,800–$2,800 | 5m wide x 2.1m tall, single skin steel |
| Sectional roller door (insulated, remote) | $2,800–$4,500 | Insulated, remote opener, sectional panels |
| Tilt panel or premium door (panel-lift) | $3,500–$6,500 | Cedar look, contemporary styling |
| PA (personal access) door | $650–$1,200 | Single hinged door, lockable |
| Window (1.2m x 0.9m) | $450–$850 | Aluminium-framed, fixed or sliding |
| Power (2 x double GPO + 1 light circuit) | $1,200–$2,200 | Includes RCD, conduit, sub-board if needed |
| LED battens (4 x 1.2m) | $280–$550 | Standard workshop lighting |
| Insulation + lining (R3.5 walls + ceiling) | $3,500–$5,500 | Plasterboard lined, painted |
| Epoxy floor coating | $1,800–$3,200 | $50–$90/m² for solvent-based |
| Council permit + drawings | $1,500–$3,500 | Higher in heritage overlays |
| Driveway extension | $2,500–$6,500 | If existing crossover insufficient |
Double Garage vs Single Garage — Is It Worth the Upgrade?
Going from single (3m×6m / 18m²) to double (6m×6m / 36m²) typically adds $8,000–$15,000 to the build cost — but it doubles the usable floor area. Cost per square metre actually drops because slab, permit, roof, and labour costs don’t double linearly.
| Garage size | Floor area | Typical build cost | $/m² |
|---|---|---|---|
| Single (3m×6m) | 18m² | $18,000–$35,000 | $1,000–$1,950 |
| Double (6m×6m) | 36m² | $28,000–$55,000 | $780–$1,530 |
| Triple (9m×6m) | 54m² | $45,000–$75,000 | $830–$1,390 |
The double is the sweet spot — best $/m² for most Melbourne suburban lots, and aligns with what buyers expect to find when selling. Single garages are often a resale negative in family suburbs (Berwick, Pakenham, Officer, Cranbourne); doubles are neutral-to-positive.
Double Garage Timeline
- Weeks 1–3: Designer/draftsperson preps plans, energy report, soil test
- Weeks 4–8: Council permit (longer in heritage overlay areas)
- Week 9: Site prep, slab pour, 7-day cure
- Week 10: Frame, roof, cladding
- Week 11: Door, electrical, finishing
- Week 12: Final inspection, certificate of occupancy
Total: 10–14 weeks from signed contract to keys, weather permitting.
Hidden Costs Specific to Double Garages
- Driveway widening — an existing single-car crossover usually needs widening to fit the double. Council crossover application costs $750–$1,800, civil works $2,500–$6,500.
- Stormwater easement — larger roof means larger downpipes, may need new stormwater connection. $850–$2,200.
- Energy efficiency report — any habitable lining or window over 1.5m² triggers Section J energy compliance. $250–$650.
- Two-car turning circle — if the lot is tight, you may need additional paving for swing-in turning. $1,500–$4,500.
Build Timeline (Typical Melbourne Project)
| Phase | Duration | What Happens |
|---|---|---|
| Design + plans | 2–4 weeks | Drafter or builder produces plans + engineering |
| Permits | 4–12 weeks | Council building permit (planning permit adds weeks) |
| Site prep + slab | 1–2 weeks | Excavation, formwork, pour, cure |
| Frame + roof | 1–2 weeks | Walls up, roof on (lock-up) |
| Cladding + doors | 1 week | External finishes, doors installed |
| Electrical + plumbing rough-in | 3–5 days | Conduit, wiring, pipework before linings |
| Internal linings + paint | 1–2 weeks | If habitable / workshop fit-out |
| Final inspections + occupancy | 1–2 weeks | Building surveyor + Council sign-off |
| Total (basic Colorbond) | 6–10 weeks | From plans to keys |
| Total (brick + studio above) | 16–24 weeks | From plans to occupancy |
DIY vs Hire a Builder
Garage construction in Victoria is regulated — structural framing, electrical work, plumbing all require licensed trades under the Building Act 1993. DIY scope is limited to:
- Site prep + landscaping work (no excavation under 1m depth)
- Concrete slab IF you’re a registered builder OR you engage one for sign-off
- External painting + minor finishes after handover
- Internal fit-out (shelving, workbench, organisation)
Engaging a registered builder for the whole project is the standard approach and what insurers/conveyancers expect. Owner-builder permits are legal but require 6-day course, OB-WHS plan, additional insurance, and shift liability to you.
Top 10 Tips and Gotchas
- Always get 3 quotes from registered builders. Variance is 30–60% for the same brief. Check Victorian Building Authority licence numbers.
- Get the building permit BEFORE pouring the slab. Retrospective permits cost more, take longer, and may not be granted.
- Check boundary setbacks. Most Melbourne councils require 1m side + 3m rear setback for non-attached garages. Some allow 0m with neighbour consent.
- Plan for power BEFORE the slab. Conduit must be in the slab or under it — retrofit is expensive.
- Don’t skip Domestic Building Insurance. Required by law for jobs over $16,000 — protects you if builder fails.
- Verify width for car door clearance. Standard single garage is 3m wide; allow 3.2m minimum for comfortable door opening. Double garage 6m is tight — 6.4m better.
- Specify the door type carefully. Sectional doors look modern + insulate better; roller doors cheaper. Both motorised options add $400–$800.
- Plan for natural light. One window per garage bay halves daytime electrical use. Whirlybird vent + skylight prevents heat buildup.
- Check the soil type. Reactive clay (common in SE Melbourne suburbs) needs deeper footings or piers — adds $1,500–$4,000.
- Plan storage from day one. Built-in shelving designed during framing costs 60% less than retrofitted after lock-up.
Local Melbourne Resources
- Victorian Building Authority — check builder/contractor licence + insurance
- Victorian Planning — ResCode + planning scheme
- City of Casey — Berwick, Cranbourne, Narre Warren planning info
- Cardinia Shire — Pakenham, Officer planning info
- Frankston City — permits + setback rules
- Bunnings — Colorbond kit garages, roller doors, fixings
- BlueScope Steel — Colorbond cladding colour ranges
- Master Builders Victoria — find registered builders
FAQ
How much does it cost to build a single garage in Melbourne?
A single garage (3m×6m) in Melbourne costs $18,000–$25,000 for a Colorbond steel kit garage supplied + built, or $26,000–$35,000 for a brick veneer match to your existing home. Add $1,200–$2,400 for a motorised roller door, $1,800–$3,500 for basic electrical, and $450–$900 for the council building permit.
How much does a double garage cost to build?
A standard double garage (6m×6m, 36m²) costs $28,000–$42,000 in Colorbond steel or $38,000–$55,000 in brick veneer in 2026 Melbourne. Add $1,500–$3,500 for electrical, $450–$1,200 for permits, and $300–$650 for builder’s insurance. Total typically lands at $32,000–$48,000 for steel or $45,000–$65,000 for brick.
Do I need a council permit for a garage in Melbourne?
Yes, for any garage over 10m² under Victorian Building Regulations. A building permit ($450–$1,200) is required. A planning permit ($1,500–$4,500 extra) is needed if the garage exceeds ResCode standards (setbacks, lot coverage, visual amenity). Heritage overlay areas always need additional approval.
How long does it take to build a garage in Melbourne?
From design to keys: 6–10 weeks for a basic Colorbond garage, 10–16 weeks for brick veneer, 16–24 weeks for garage with studio/granny flat above. Permits often consume 4–12 weeks of that — budget extra time if your block needs a planning permit.
Is it cheaper to build a garage or convert an existing structure?
Building new is usually cheaper than converting unless the existing structure already has slab, walls, and roof at suitable spec. Converting a carport to enclosed garage adds $8,000–$18,000 (walls, doors, electrical). Converting a shed adds $15,000–$30,000 (engineering, foundations, doors, council compliance). Building fresh is faster and predictable.
Can I add an apartment or studio above my garage?
Yes — legally classified as a Dependent Person’s Unit under Victorian planning rules. Typical cost is $85,000–$160,000 for the garage + 1-bedroom studio combined, requiring building + planning permits, sewer connection, fire separation, and engineering certification. Many councils accept this as an alternative to separate granny flats with similar approval times.
What’s the cheapest way to build a garage in Melbourne?
A Colorbond steel kit garage (single 3m×6m) at $18,000–$22,000 supplied + erected is the cheapest legal option. Kit garages from Bunnings or specialised suppliers include all frames, sheets, doors, and fixings — only slab + electrical + permits are extra. Total minimum spend: ~$22,000–$27,000 all-in.
Final Thoughts
Building a garage is one of the higher-ROI additions to a Melbourne home — it adds 5–10% to property value, protects vehicles from sun/storm damage, and creates flexible storage/workshop space.
Here’s the bottom line:
- Single Colorbond garage: $18,000–$25,000 supplied + built
- Double Colorbond garage: $28,000–$42,000
- Triple Colorbond garage: $42,000–$58,000
- Garage + studio above: $85,000–$160,000
- Always get 3 quotes from VBA-registered builders
- Pull the building permit BEFORE pouring slab — retrospective permits cost 3×
- Plan for power, lighting, and storage during the design phase — retrofit is expensive
Pair this work with: carport vs garage comparison, driveway cost guide, and EV charger installation — build them together to save on combined trades and permits.
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