Turnkey Build
One builder handles everything — design, approval, construction and handover. Turnkey granny flat builds from $100,000 to $350,000.
A turnkey granny flat build is a single-contract arrangement where one builder or company handles the entire project from design through to handover. As of Q1 2026, turnkey prices range from $100,000 to $350,000 depending on size, finish level and site complexity.
This is the most common way Australians build granny flats. You deal with one company, sign one contract, and receive a completed dwelling with an occupation certificate. The builder manages design, council approval, construction, trade coordination and final inspections.
The word turnkey means you receive the keys to a finished, liveable dwelling. In practice, what counts as turnkey varies between builders — some include landscaping and driveways, others do not. Understanding exactly what is and is not included in a turnkey quote is the single most important step in comparing builders.
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.
What is typically included in a turnkey quote
A genuine turnkey quote covers design and architectural plans, council approval (CDC or DA), concrete slab or foundations, structural frame and external cladding, roofing, internal fit-out (kitchen, bathroom, flooring, painting), plumbing and electrical rough-in and fit-off, and final certification including the occupation certificate.
Some builders also include standard site works (up to a specified site condition) and basic landscaping around the granny flat.
What is often excluded
Site clearing and excavation beyond the standard allowance. Retaining walls for sloping sites. Extended service connections — if your sewer, water or power connections are more than a specified distance from the build (often 10 to 15 metres). Driveway or pathway construction. Landscaping and fencing. Council contribution levies (Section 7.12 contributions in NSW). Demolition of existing structures.
These exclusions can add $15,000 to $50,000 to the project cost. Always ask builders for a list of included and excluded items before comparing quotes.
How to compare turnkey quotes
Do not compare on headline price alone. Two builders quoting $160,000 and $175,000 may deliver very different outcomes if one excludes site works and the other includes them.
Ask every builder for a line-item breakdown showing what is included. Check whether the price includes or excludes GST. Confirm the allowances for fixtures, fittings and finishes — a low-cost kitchen allowance means you pay the difference for anything better than the base specification.
Get at least three quotes from builders who have inspected your site. Phone quotes or online estimates without a site visit are not reliable.
Specialist granny flat company vs general builder
Specialist granny flat companies typically offer faster timelines (12 to 16 weeks build), streamlined council approval and established supply chains. They work from a library of proven designs that they have built repeatedly.
General builders offer more design flexibility and may be cheaper for simple builds, but timelines are often longer (16 to 24 weeks) and they may have less experience with the specific approval requirements for secondary dwellings. Council liaison may not be included.
Turnkey granny flat cost ranges
These ranges cover genuine turnkey builds including design, approval, construction and handover on standard flat sites. All figures as of Q1 2026.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Studio turnkey (under 36 sqm) | $120,000–$160,000 | Open-plan studio with kitchenette and bathroom. Fastest and most affordable turnkey option. |
| 1-bedroom turnkey (36–45 sqm) | $140,000–$200,000 | Separate bedroom with living area. The most common turnkey build size. |
| 2-bedroom turnkey (50–60 sqm) | $160,000–$250,000 | Two bedrooms with full kitchen and bathroom. Most popular for rental income. |
| Premium or complex site | $220,000–$350,000 | High-end finishes, sloping or restricted-access sites, or Eastern Sydney and inner-city Melbourne locations. |
Ranges compiled from published turnkey pricing from specialist granny flat companies and verified builder quotes across NSW, VIC and QLD. Includes design, approval, construction and standard site works.
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.
A turnkey granny flat build is a single-contract arrangement where one builder or company handles the entire project from design through to handover. As of Q1 2026, turnkey prices range from $100,000 to $350,000 depending on size, finish level and site complexity.
This is the most common way Australians build granny flats. You deal with one company, sign one contract, and receive a completed dwelling with an occupation certificate. The builder manages design, council approval, construction, trade coordination and final inspections.
The word turnkey means you receive the keys to a finished, liveable dwelling. In practice, what counts as turnkey varies between builders — some include landscaping and driveways, others do not. Understanding exactly what is and is not included in a turnkey quote is the single most important step in comparing builders.
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.
What is typically included in a turnkey quote
A genuine turnkey quote covers design and architectural plans, council approval (CDC or DA), concrete slab or foundations, structural frame and external cladding, roofing, internal fit-out (kitchen, bathroom, flooring, painting), plumbing and electrical rough-in and fit-off, and final certification including the occupation certificate.
Some builders also include standard site works (up to a specified site condition) and basic landscaping around the granny flat.
What is often excluded
Site clearing and excavation beyond the standard allowance. Retaining walls for sloping sites. Extended service connections — if your sewer, water or power connections are more than a specified distance from the build (often 10 to 15 metres). Driveway or pathway construction. Landscaping and fencing. Council contribution levies (Section 7.12 contributions in NSW). Demolition of existing structures.
These exclusions can add $15,000 to $50,000 to the project cost. Always ask builders for a list of included and excluded items before comparing quotes.
How to compare turnkey quotes
Do not compare on headline price alone. Two builders quoting $160,000 and $175,000 may deliver very different outcomes if one excludes site works and the other includes them.
Ask every builder for a line-item breakdown showing what is included. Check whether the price includes or excludes GST. Confirm the allowances for fixtures, fittings and finishes — a low-cost kitchen allowance means you pay the difference for anything better than the base specification.
Get at least three quotes from builders who have inspected your site. Phone quotes or online estimates without a site visit are not reliable.
Specialist granny flat company vs general builder
Specialist granny flat companies typically offer faster timelines (12 to 16 weeks build), streamlined council approval and established supply chains. They work from a library of proven designs that they have built repeatedly.
General builders offer more design flexibility and may be cheaper for simple builds, but timelines are often longer (16 to 24 weeks) and they may have less experience with the specific approval requirements for secondary dwellings. Council liaison may not be included.
Turnkey granny flat cost ranges
These ranges cover genuine turnkey builds including design, approval, construction and handover on standard flat sites. All figures as of Q1 2026.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Studio turnkey (under 36 sqm) | $120,000–$160,000 | Open-plan studio with kitchenette and bathroom. Fastest and most affordable turnkey option. |
| 1-bedroom turnkey (36–45 sqm) | $140,000–$200,000 | Separate bedroom with living area. The most common turnkey build size. |
| 2-bedroom turnkey (50–60 sqm) | $160,000–$250,000 | Two bedrooms with full kitchen and bathroom. Most popular for rental income. |
| Premium or complex site | $220,000–$350,000 | High-end finishes, sloping or restricted-access sites, or Eastern Sydney and inner-city Melbourne locations. |
Ranges compiled from published turnkey pricing from specialist granny flat companies and verified builder quotes across NSW, VIC and QLD. Includes design, approval, construction and standard site works.
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.
Turnkey builds at a glance
Cost range
$100,000 to $350,000 all-in. The range reflects the difference between a basic studio and a premium 2-bedroom with high-end finishes.
Build timeline
16 to 30 weeks from signed contract to handover. Includes 4 to 8 weeks for design and approval, then 12 to 22 weeks of construction.
Key advantage
Single point of responsibility. One contract, one builder, one warranty. You do not need to coordinate trades or manage council liaison yourself.
Best suited for
Buyers who want a hands-off experience, first-time builders who value certainty, and anyone who does not have construction management experience.
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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