How much does a granny flat cost in Brisbane?
A granny flat in Brisbane costs $101,000–$147,000 for a turnkey 1-bedroom build (35–45m²), $129,000–$193,000 for a 2-bedroom (around 60m²), and from about $74,000 supplied for a prefab or kit unit. Per square metre, turnkey builds run $2,100–$3,200/sqm depending on design, site, and finishes.
Detailed Pricing — Brisbane 2026
| Service | Low | Typical | High |
|---|---|---|---|
| Prefab / kit granny flat — 1-bed (supplied) | $74,000total | $87,000 | $110,000 |
| Studio / 1-bed granny flat (35-45m², turnkey) | $101,000total | $120,000 | $147,000 |
| 2-bed granny flat (~60m², turnkey) | $129,000total | $161,000 | $193,000 |
| Custom / premium 2-bed (high-end finishes) | $193,000total | $239,000 | $294,000 |
| Two-storey or with attached garage | $258,000total | $317,000 | $391,000 |
| Garage / outbuilding conversion | $37,000total | $69,000 | $110,000 |
| Turnkey build (per m² built) | $2,100/sqm | $2,600 | $3,200 |
| Site works + service connections | $14,000total | $23,000 | $37,000 |
| Council approval / building application | $3,000total | $6,000 | $11,000 |
| Demolition / site clearing (if needed) | $3,000total | $6,000 | $14,000 |
| Driveway, path & basic landscaping | $5,000total | $9,000 | $18,000 |
| Privacy fencing (per m) | $140/m | $200 | $280 |
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Get Brisbane quotes →Prices include GST. Based on Brisbane metro area, Mar 2026. Outer suburbs may vary.
Brisbane’s Granny Flat Market in 2026
In Brisbane, the granny flat is one of the most-requested home additions going. High property prices, multi-generational living, and strong rental demand make a secondary dwelling one of the higher-return additions a Brisbane homeowner can make — a 2-bedroom granny flat rents well and can lift property value by 10–30%. Since Queensland removed occupancy restrictions in 2022, a Brisbane secondary dwelling can be rented to anyone, making backyard builds a popular income play across the city.
The biggest swing in price is build method. Prefab and modular units (from about $74,000 supplied) are the budget end; standard site-built 1- and 2-bedroom homes ($101,000–$193,000 turnkey) are the mainstream; and custom or two-storey builds run $193,000–$391,000+. Site works and service connections ($14,000–$37,000) and approvals are the costs homeowners most often underestimate.
On the rules: In Queensland a secondary dwelling (granny flat) can be rented to anyone since 2022, with a 60m² baseline in most council schemes, though approval paths and size rules vary by council. Build method, finishes and site access set the price, with services and approval on top.
We’ve compiled pricing from Brisbane granny flat builders, prefab suppliers, and trade databases to give the most accurate picture of granny flat costs in Brisbane for 2026.
How Granny Flat Costs Vary Across Brisbane
Inner Suburbs
Typical cost: $166k–$304k turnkey
New Farm, Paddington, West End, Bulimba, Hawthorne. Character blocks are often steep or tight, adding site-works and access cost. High land values make a quality detached 2-bed a strong rental and resale play.
Bayside
Typical cost: $147k–$276k turnkey
Wynnum, Manly, Wakerley, Wellington Point. Larger flat blocks suit detached builds; coastal sites can need corrosion-resistant detailing. Strong rental demand near the water.
Southside
Typical cost: $138k–$258k turnkey
Sunnybank, Mount Gravatt, Carindale, Holland Park. Big family blocks with good access make for easy detached builds. Popular in high-demand school catchments.
Northside
Typical cost: $138k–$258k turnkey
Chermside, Aspley, Albany Creek, North Lakes. A mix of established and newer estates. Standard single-storey builds and prefab units are common.
Western Suburbs & Ipswich
Typical cost: $110k–$212k turnkey
Indooroopilly, Kenmore, Springfield, Ipswich. The most affordable area — flat newer blocks and easy access keep turnkey prices low. Strong rental yields in growth estates.
What You’ll Actually Pay — Common Brisbane Granny Flat Builds
These are real-world all-in prices for common Brisbane granny flat builds in 2026 — covering build, standard site works, services and approvals where they apply.
1-bedroom granny flat — 40m², turnkey
$101,000–$138,000 total
The most popular build for independent living or a single tenant on a standard Brisbane block. A detached single-storey home with bedroom, bathroom, kitchenette and open living, standard finishes, slab and service connections. Around 12–14 weeks once approved.
2-bedroom granny flat — 60m², turnkey
$138,000–$193,000 total
The strongest rental option — two bedrooms, a full bathroom and a real kitchen. Standard-to-mid finishes with slab, services and approval rolled in. Budget 14–16 weeks of build time once approved; it’s the bread-and-butter Brisbane investment build.
Prefab / modular 2-bed — installed
$87,000–$147,000 total
Factory-built and craned in, then connected to services on a prepared slab. Faster than site-built and priced lower, with less on-site disruption. Site works, slab and connections are usually quoted on top of the supplied unit price.
Garage / outbuilding conversion to studio
$41,000–$87,000 total
Converting an existing garage or outbuilding is the cheapest route to a secondary dwelling, but plumbing, a bathroom and kitchenette, insulation, glazing and compliance upgrades drive the price. Best value where the existing slab and walls are sound.
Custom architect 2-bed / two-storey
$239,000–$391,000 total
A premium, fully designed secondary dwelling — high-end finishes, a larger footprint, or a two-storey design on a tight block. Needs design and engineering, and is common across the southside and bayside suburbs where land value justifies the spend.
What Affects Granny Flat Costs in Brisbane
Build method
Prefab/kit units (from ~$74,000 supplied) are cheapest; standard site-built homes are mainstream; custom and two-storey designs cost the most.
Size & bedrooms
Expect $101,000–$147,000 for a turnkey 1-bed (35–45m²) and $129,000–$193,000 for a 2-bed (~60m²) — 60m² being the usual size cap.
Site works & access
Slope, rock, poor access and craneage add $14,000–$37,000. Flat, clear, easy-access blocks are far cheaper to build on.
Service connections
Water, sewer, power and stormwater connections add cost — keeping wet areas near the main house’s services keeps plumbing runs short.
Approvals
In Queensland a secondary dwelling (granny flat) can be rented to anyone since 2022, with a 60m² baseline in most council schemes, though approval paths and size rules vary by council.
Finishes & inclusions
Standard finishes keep costs down; stone benchtops, premium flooring, decks and air-conditioning push a build toward the top of the range.
How to Save Money on a Granny Flat in Brisbane
Frequently Asked Questions
Our Methodology
We build these estimates by pulling pricing from public cost guides, major trade marketplaces, industry body rate data, and builders’ own websites, then cross-checking the ranges and adjusting for local cost-of-living and advertised labour rates. The figures are editorially independent and no business pays to change them. Treat every number as a guide rather than a quote — the only way to know your real price is to get a few written quotes. Last reviewed June 2026. Read our full methodology →