1-Bedroom Granny Flats
A separate bedroom, dedicated living space, and full kitchen in 36 to 45 sqm — the sweet spot for rental income and independent living.
A one-bedroom granny flat separates the bedroom from the living area with a solid wall and door — a distinction that matters for privacy, rental appeal and long-term liveability. As of Q1 2026, turnkey costs range from $100,000 to $200,000 for builds between 36 and 45 sqm.
The one-bedroom layout is the most popular choice for property owners building a granny flat for an elderly parent or adult child. It provides genuine separation between sleeping and living without the higher cost of a two-bedroom design.
Rental demand for one-bedroom granny flats remains strong across most Australian capital cities. A separate bedroom lifts weekly rent by $40 to $80 compared to an equivalent studio, which typically recoups the extra build cost within two to three years.
What defines a one-bedroom granny flat?
A one-bedroom granny flat has a separate enclosed bedroom, an open-plan living and kitchen area, a bathroom and usually a combined laundry nook. Total floor area typically falls between 36 and 45 sqm. Like all granny flats, it must be self-contained with its own entrance, cooking facilities and bathroom to qualify as a secondary dwelling under Australian building codes.
Layout options
Most one-bedroom designs use one of three layouts. The linear plan places rooms in a row — bedroom at one end, living at the other, bathroom and kitchen between. The L-shaped plan wraps the bedroom around a corner for better separation from the living zone. The central-core plan clusters wet areas (bathroom, kitchen, laundry) in the middle, with bedroom and living on either side.
The linear layout is cheapest to build because the roofline and plumbing runs stay simple. The L-shape adds a small cost premium but delivers noticeably better acoustic privacy between bedroom and living areas.
Why the separate bedroom matters for rental
Australian tenancy databases classify dwellings by bedroom count, and most rental listing platforms default-filter by bedroom number. A one-bedroom flat appears in a different — and larger — search pool than a studio. In Sydney and Melbourne, one-bedroom granny flats typically achieve $350 to $450 per week as of Q1 2026, compared to $280 to $370 for studios in the same suburbs.
Choosing between studio, one-bedroom and two-bedroom
The studio layout costs less upfront but limits long-term flexibility. If the dwelling is for a single occupant who values low cost above all else, a studio works well. If privacy, rental returns or accommodating a couple matters, the one-bedroom is the better investment.
A two-bedroom design makes sense when the dwelling needs to house a small family or when maximum rental yield is the goal — but it costs $30,000 to $80,000 more than a comparable one-bedroom build.
Approval and regulations
One-bedroom granny flats follow the same CDC or DA approval pathway as other secondary dwellings. In NSW, any granny flat up to 60 sqm on a lot of 450 sqm or more qualifies for complying development under the Housing SEPP. One-bedroom builds sit well within this limit.
For detailed pricing by size tier, see the granny flat cost guide. To find builders with one-bedroom designs in their catalogue, check the builder directory.
1-Bedroom Granny Flat Costs
One-bedroom granny flat prices as of Q1 2026, based on turnkey builds including slab, services connection, council fees and standard finishes.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Compact 1-bed (36 sqm) | $100,000–$140,000 | Efficient layout with combined living-dining, compact kitchen and single bathroom. Basic to mid-range finishes. |
| Standard 1-bed (40 sqm) | $130,000–$170,000 | Dedicated living room, full kitchen with oven and dishwasher cavity, separate laundry nook. Mid-range finishes. |
| Large 1-bed (45 sqm) | $160,000–$200,000 | Generous bedroom with built-in wardrobe, spacious bathroom, full kitchen. Higher-spec fixtures and finishes. |
Ranges reflect quoted turnkey prices from Australian granny flat builders collected in Q1 2026. Actual costs vary with site access, soil conditions, slope and council requirements.
Last checked: 1 April 2026
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.
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.
What defines a one-bedroom granny flat?
A one-bedroom granny flat has a separate enclosed bedroom, an open-plan living and kitchen area, a bathroom and usually a combined laundry nook. Total floor area typically falls between 36 and 45 sqm. Like all granny flats, it must be self-contained with its own entrance, cooking facilities and bathroom to qualify as a secondary dwelling under Australian building codes.
Layout options
Most one-bedroom designs use one of three layouts. The linear plan places rooms in a row — bedroom at one end, living at the other, bathroom and kitchen between. The L-shaped plan wraps the bedroom around a corner for better separation from the living zone. The central-core plan clusters wet areas (bathroom, kitchen, laundry) in the middle, with bedroom and living on either side.
The linear layout is cheapest to build because the roofline and plumbing runs stay simple. The L-shape adds a small cost premium but delivers noticeably better acoustic privacy between bedroom and living areas.
Why the separate bedroom matters for rental
Australian tenancy databases classify dwellings by bedroom count, and most rental listing platforms default-filter by bedroom number. A one-bedroom flat appears in a different — and larger — search pool than a studio. In Sydney and Melbourne, one-bedroom granny flats typically achieve $350 to $450 per week as of Q1 2026, compared to $280 to $370 for studios in the same suburbs.
Choosing between studio, one-bedroom and two-bedroom
The studio layout costs less upfront but limits long-term flexibility. If the dwelling is for a single occupant who values low cost above all else, a studio works well. If privacy, rental returns or accommodating a couple matters, the one-bedroom is the better investment.
A two-bedroom design makes sense when the dwelling needs to house a small family or when maximum rental yield is the goal — but it costs $30,000 to $80,000 more than a comparable one-bedroom build.
Approval and regulations
One-bedroom granny flats follow the same CDC or DA approval pathway as other secondary dwellings. In NSW, any granny flat up to 60 sqm on a lot of 450 sqm or more qualifies for complying development under the Housing SEPP. One-bedroom builds sit well within this limit.
For detailed pricing by size tier, see the granny flat cost guide. To find builders with one-bedroom designs in their catalogue, check the builder directory.
1-Bedroom Granny Flat Costs
One-bedroom granny flat prices as of Q1 2026, based on turnkey builds including slab, services connection, council fees and standard finishes.
| Scenario | Cost range (AUD, ex GST) | Notes |
|---|---|---|
| Compact 1-bed (36 sqm) | $100,000–$140,000 | Efficient layout with combined living-dining, compact kitchen and single bathroom. Basic to mid-range finishes. |
| Standard 1-bed (40 sqm) | $130,000–$170,000 | Dedicated living room, full kitchen with oven and dishwasher cavity, separate laundry nook. Mid-range finishes. |
| Large 1-bed (45 sqm) | $160,000–$200,000 | Generous bedroom with built-in wardrobe, spacious bathroom, full kitchen. Higher-spec fixtures and finishes. |
Ranges reflect quoted turnkey prices from Australian granny flat builders collected in Q1 2026. Actual costs vary with site access, soil conditions, slope and council requirements.
Last checked: 1 April 2026
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.
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.
1-Bedroom Granny Flat at a Glance
Typical cost
$100,000 to $200,000 turnkey, covering slab, services, council fees and standard finishes.
Size
36 to 45 sqm internal floor area — enough for a bedroom, living room, kitchen, bathroom and laundry nook.
Timeline
12 to 18 weeks from slab pour to completion, depending on site complexity and approval pathway.
Best for
Rental income, elderly parents wanting privacy, or adult children transitioning to independent living.
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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