Kit Supply
Materials and plans supplied for owner-builder or builder assembly — from $30,000 to $80,000 for the kit package.
Kit supply is a materials-only service — a supplier provides the structural components, cladding, roofing, windows, doors and plans for a granny flat, and you arrange construction separately. As of Q1 2026, kit supply packages cost between $30,000 and $80,000 depending on size and specification.
This is the most affordable entry point for a granny flat, but the kit is only a fraction of the total cost. You still need a concrete slab, licensed tradespeople for plumbing and electrical, council approval, inspections and internal finishing. Total project cost with a kit is typically $70,000 to $150,000.
Kit supply suits owner-builders who want maximum control over trade selection and project timing, or buyers working with a licensed builder who prefer to source materials independently from labour.
Granny flat builders in Australia
Browse profiles, compare service areas, and check reviews.
Garden Studios
★ 5.0 (63 reviews)
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Perway Ecopods
★ 5.0 (43 reviews)
Perth-based home renovation and construction company offering custom builds with transparent service.
View profile →
Out-Back Portable Buildings
★ 5.0 (25 reviews)
Custom-made, pre-fabricated transportable homes including granny flats, offices, and portable buildings.
View profile →
Adams Cabins
★ 5.0 (20 reviews)
Family-owned cabin builders specializing in log cabins, granny flats, and tiny homes in SE Queensland.
View profile →
ATN Constructions
★ 5.0 (18 reviews)
View profile →
Dare Constructions
★ 5.0 (16 reviews)
Steel frame construction specialist including granny flats, carports, sheds across Newcastle, Hunter Valley, and Sydney.
View profile →
GrannyFlatGuide is a comparison platform. Companies shown are filtered by relevance to this page. Listing does not imply endorsement. GrannyFlatGuide may receive a referral fee when you request quotes.
Kit supply vs kit build
Kit supply means materials only — the supplier delivers the package and you handle everything else. Kit build means the supplier also provides assembly, either through their own crew or a nominated builder.
The price difference between supply-only and supply-plus-assembly is significant. A 1-bedroom kit supply package might cost $40,000, while the same kit with builder assembly runs $80,000 to $100,000. The gap covers labour, project management and the builder's margin.
What is in a typical kit
A standard kit supply package includes pre-cut or pre-nailed structural timber frames, external cladding (fibre cement, weatherboard or metal), Colorbond roofing and fascia, windows and external doors, internal wall and ceiling lining, fixing hardware and fasteners, and architectural plans suitable for council submission.
Some suppliers offer tiered packages — a base kit with standard materials and an upgraded kit with premium cladding, better windows and insulation upgrades.
What you need to arrange separately
The kit covers the shell. Everything else is your responsibility.
Site preparation: concrete slab or strip footings ($8,000 to $15,000 depending on site). Plumbing: rough-in, fit-off, hot water and sewer connection ($6,000 to $12,000). Electrical: wiring, switchboard, meter and connection ($5,000 to $10,000). Council approval: CDC or DA fees ($3,000 to $8,000). Internal finishing: tiling, cabinetry, painting, flooring ($5,000 to $15,000).
Total additional costs typically range from $40,000 to $70,000 on top of the kit price.
Owner-builder requirements
If you are managing the build yourself, you need an owner-builder permit in most states. In NSW, this requires completing an owner-builder course (around $400) for projects over $10,000. In VIC, the threshold is $16,000.
Owner-builders carry the same legal obligations as licensed builders — including responsibility for building code compliance, workplace safety and insurance. You must also disclose owner-builder work when selling the property. NSW has a 5-year disclosure and insurance requirement, VIC has 6.5 years.
Kit supply cost ranges
Kit supply prices cover the materials package only. Total project costs including slab, trades and council fees are shown separately. All figures as of Q1 2026.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Basic kit package (1-bed) | $30,000–$45,000 | Standard materials, basic window and door package. Plans included. |
| Standard kit (1-bed) | $40,000–$55,000 | Better windows, upgraded cladding, insulation included. Plans and engineering included. |
| Premium kit (2-bed) | $55,000–$80,000 | Two-bedroom package with upgraded fixtures, double-glazed windows, premium cladding. |
| Additional costs (slab + trades + fees) | $40,000–$70,000 | Concrete slab, plumbing, electrical, council approval, internal finishing. Varies by site and location. |
Kit prices compiled from published pricing by Australian kit granny flat suppliers. Additional costs based on verified trade quotes across NSW, VIC and QLD metro areas.
Last checked: 1 April 2026
See if your property qualifies
Your property’s zoning and overlays determine what you can build. Check yours for free.
What can you build on your property?
Enter your address and we'll check your zoning, overlays, and what's possible on your block.
We use your address to check council zoning and planning rules — not stored until you choose to continue.
Kit supply is a materials-only service — a supplier provides the structural components, cladding, roofing, windows, doors and plans for a granny flat, and you arrange construction separately. As of Q1 2026, kit supply packages cost between $30,000 and $80,000 depending on size and specification.
This is the most affordable entry point for a granny flat, but the kit is only a fraction of the total cost. You still need a concrete slab, licensed tradespeople for plumbing and electrical, council approval, inspections and internal finishing. Total project cost with a kit is typically $70,000 to $150,000.
Kit supply suits owner-builders who want maximum control over trade selection and project timing, or buyers working with a licensed builder who prefer to source materials independently from labour.
Granny flat builders in Australia
Browse profiles, compare service areas, and check reviews.
Garden Studios
★ 5.0 (63 reviews)
View profile →
Perway Ecopods
★ 5.0 (43 reviews)
Perth-based home renovation and construction company offering custom builds with transparent service.
View profile →
Out-Back Portable Buildings
★ 5.0 (25 reviews)
Custom-made, pre-fabricated transportable homes including granny flats, offices, and portable buildings.
View profile →
Adams Cabins
★ 5.0 (20 reviews)
Family-owned cabin builders specializing in log cabins, granny flats, and tiny homes in SE Queensland.
View profile →
ATN Constructions
★ 5.0 (18 reviews)
View profile →
Dare Constructions
★ 5.0 (16 reviews)
Steel frame construction specialist including granny flats, carports, sheds across Newcastle, Hunter Valley, and Sydney.
View profile →
GrannyFlatGuide is a comparison platform. Companies shown are filtered by relevance to this page. Listing does not imply endorsement. GrannyFlatGuide may receive a referral fee when you request quotes.
Kit supply vs kit build
Kit supply means materials only — the supplier delivers the package and you handle everything else. Kit build means the supplier also provides assembly, either through their own crew or a nominated builder.
The price difference between supply-only and supply-plus-assembly is significant. A 1-bedroom kit supply package might cost $40,000, while the same kit with builder assembly runs $80,000 to $100,000. The gap covers labour, project management and the builder's margin.
What is in a typical kit
A standard kit supply package includes pre-cut or pre-nailed structural timber frames, external cladding (fibre cement, weatherboard or metal), Colorbond roofing and fascia, windows and external doors, internal wall and ceiling lining, fixing hardware and fasteners, and architectural plans suitable for council submission.
Some suppliers offer tiered packages — a base kit with standard materials and an upgraded kit with premium cladding, better windows and insulation upgrades.
What you need to arrange separately
The kit covers the shell. Everything else is your responsibility.
Site preparation: concrete slab or strip footings ($8,000 to $15,000 depending on site). Plumbing: rough-in, fit-off, hot water and sewer connection ($6,000 to $12,000). Electrical: wiring, switchboard, meter and connection ($5,000 to $10,000). Council approval: CDC or DA fees ($3,000 to $8,000). Internal finishing: tiling, cabinetry, painting, flooring ($5,000 to $15,000).
Total additional costs typically range from $40,000 to $70,000 on top of the kit price.
Owner-builder requirements
If you are managing the build yourself, you need an owner-builder permit in most states. In NSW, this requires completing an owner-builder course (around $400) for projects over $10,000. In VIC, the threshold is $16,000.
Owner-builders carry the same legal obligations as licensed builders — including responsibility for building code compliance, workplace safety and insurance. You must also disclose owner-builder work when selling the property. NSW has a 5-year disclosure and insurance requirement, VIC has 6.5 years.
Kit supply cost ranges
Kit supply prices cover the materials package only. Total project costs including slab, trades and council fees are shown separately. All figures as of Q1 2026.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Basic kit package (1-bed) | $30,000–$45,000 | Standard materials, basic window and door package. Plans included. |
| Standard kit (1-bed) | $40,000–$55,000 | Better windows, upgraded cladding, insulation included. Plans and engineering included. |
| Premium kit (2-bed) | $55,000–$80,000 | Two-bedroom package with upgraded fixtures, double-glazed windows, premium cladding. |
| Additional costs (slab + trades + fees) | $40,000–$70,000 | Concrete slab, plumbing, electrical, council approval, internal finishing. Varies by site and location. |
Kit prices compiled from published pricing by Australian kit granny flat suppliers. Additional costs based on verified trade quotes across NSW, VIC and QLD metro areas.
Last checked: 1 April 2026
See if your property qualifies
Your property’s zoning and overlays determine what you can build. Check yours for free.
What can you build on your property?
Enter your address and we'll check your zoning, overlays, and what's possible on your block.
We use your address to check council zoning and planning rules — not stored until you choose to continue.
Kit supply at a glance
Kit cost
$30,000 to $80,000 for the materials package. This is 30 to 40 percent of total project cost — not the finished price.
What you still need
Concrete slab ($8,000–$15,000), plumbing ($6,000–$12,000), electrical ($5,000–$10,000), council fees ($3,000–$8,000), plus tiling, painting and finishing.
Key advantage
Lowest upfront cost. You choose your own trades and can stage the build over time to manage cash flow.
Key risk
You carry the coordination risk. If trades are delayed, quality is inconsistent or council requirements are missed, there is no single party responsible.
Related guides
Guide
Granny Flat Rules Victoria 2026 — Planning & Building Guide
Victoria's granny flat rules explained — planning permits, 60sqm cap, building requirements, DPU changes, and how the 2023-2026 reforms affect your build.
Guide
Granny Flat Rules NSW — CDC, Setbacks & Approvals (2026)
NSW granny flat rules explained — lot size minimums, CDC vs DA pathways, setback distances and BASIX requirements under SEPP (Housing) 2021.
Cost guide
2 Bedroom Granny Flat Cost — Pricing by Build Type (2026)
A 2-bedroom granny flat costs $114,000–$237,000 GST-inclusive in Australia. See pricing by build type (kit, prefab, custom), state, and finish level.
Cost guide
Granny Flat Prices in Australia — Real Builder Pricing Compared (2026)
Compare real granny flat prices across budget prefab, mid-range custom, and premium turnkey tiers. See what the 'from' price includes and what you'll actually pay in 2026.
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