How much does a granny flat cost in Townsville?
A one-bedroom transportable or modular granny flat in Townsville starts at $80,000–$120,000 delivered, before it is set down and connected on your block. Built on site and handed over finished, a 35–45 m² studio or single-bedroom flat comes to $110,000–$160,000 ($130,000 is typical), while about 60 m² with two bedrooms is $140,000–$210,000. Two local conditions shape every design here: Townsville City Council caps a secondary dwelling at 90 m², and the city lies in cyclonic Wind Region C. With 38.3% of households renting (ABS 2021 Census), plenty of owners also weigh up the rent a second dwelling could bring in.
Comparing cities, or after the Australia-wide picture? See the national guide: How much does a granny flat cost in Australia?
Detailed Pricing — Granny Flat Cost in Townsville 2026
| Service | Low | Typical | High |
|---|---|---|---|
| Prefab / modular granny flat — 1-bed (delivered) | $80,000total | $95,000 | $120,000 |
| Studio / 1-bed granny flat (35-45m², turnkey) | $110,000total | $130,000 | $160,000 |
| 2-bed granny flat (~60m², turnkey) | $140,000total | $175,000 | $210,000 |
| Custom / premium 2-bed (high-end finishes) | $210,000total | $260,000 | $320,000 |
| Two-storey granny flat (complete, incl. site costs + approvals) | $280,000total | $345,000 | $425,000 |
| Granny flat with attached single garage (complete, incl. site costs + approvals) | $170,000total | $210,000 | $260,000 |
| Garage / outbuilding conversion | $40,000total | $75,000 | $120,000 |
| Turnkey build (per m² built) | $2,300/sqm | $2,800 | $3,500 |
| Site works + service connections | $15,000total | $25,000 | $40,000 |
| Council approval / building application | $3,000total | $6,000 | $12,000 |
| Demolition / site clearing (if needed) | $3,000total | $6,000 | $15,000 |
| Driveway, path & basic landscaping | $5,000total | $10,000 | $20,000 |
| Privacy fencing (per m) | $80/m | $130 | $190 |
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Get Townsville quotes →Prices include GST. Based on Townsville metro area, October 2026. Outer suburbs may vary.
Townsville’s Granny Flat Market in 2026
Queensland defines a secondary dwelling as one used with, but subordinate to, another dwelling on the same lot, and its occupants need not be related to the main household. That definition dates from 2022.
A granny flat sits inside the dwelling-house use, not as a dual occupancy, and building approval comes from the council or a building certifier — the table’s approval row is $3,000–$12,000.
For Townsville prices, the table gives a two-bedroom flat of about 60 m² at $140,000–$210,000 turnkey and a studio or one-bedroom at $110,000–$160,000.
How Granny Flat Costs Vary Across Townsville
Inner & Castle Hill
Typical cost: $180k–$330k turnkey
North Ward, Castle Hill, Belgian Gardens, South Townsville. Hillside and coastal blocks with full cyclone exposure. Heavily engineered, quality builds.
Northern Beaches
Typical cost: $160k–$300k turnkey
Pallarenda, Bushland Beach, Saunders Beach. Coastal blocks with cyclone and salt exposure. Cyclonic engineering and corrosion-resistant detailing are standard.
Suburban Townsville
Typical cost: $150k–$280k turnkey
Kirwan, Thuringowa, Aitkenvale, Annandale. Established family suburbs on flat blocks. Standard detached builds, all cyclone-rated.
University & South
Typical cost: $150k–$280k turnkey
Douglas, Wulguru, Oonoonba, Idalia. Family homes near the university and hospital — strong rental demand. Cyclone-engineered builds.
Growth & Rural
Typical cost: $120k–$230k turnkey
Mount Louisa, Bohle Plains, Deeragun, Rasmussen. Newer estates on flat blocks with easy access. Best value; all builds cyclone-rated.
What You’ll Actually Pay — Common Townsville Granny Flat Builds
Townsville granny flats from this page’s rows.
1-bedroom granny flat — 40m², turnkey
$110,000–$160,000 total
Typically $130,000 for a turnkey studio or one-bedroom; site works and connections add $15,000–$40,000.
2-bedroom granny flat — 60m², turnkey
$140,000–$210,000 total
A two-bedroom flat, typically $175,000; with the typical approval ($6,000), $181,000.
Prefab / modular 2-bed — installed
$80,000–$120,000 delivered (1-bed row)
Delivered one-bedroom prefab only: $80,000–$120,000.
Garage / outbuilding conversion to studio
$40,000–$120,000 total
Conversion of a garage or outbuilding, $40,000–$120,000 in the table.
Custom architect 2-bed / two-storey
$210,000–$425,000 total
Custom $210,000–$320,000; two storeys or with a garage $280,000–$425,000.
Townsville granny flats: transportables, a garage conversion or a studio, two storeys, and renters
Transportable granny flats in Townsville
Our Townsville table prices a one-bedroom prefab or modular flat, built off site and delivered, at $80,000–$120,000, typically $95,000. It has no row for relocating an existing transportable home, so we don't publish a price for that.
A garage conversion or a new studio in Townsville
Converting a garage or outbuilding is $40,000–$120,000 in our Townsville table, and a new turnkey studio or one-bedroom flat $110,000–$160,000. At the typical prices the conversion is $55,000 less.
Two storeys or a garage underneath in Townsville
A two-storey granny flat, or one with an attached garage, is $280,000–$425,000 in our Townsville table, against $140,000–$210,000 for a single-level two-bedroom flat of about 60 square metres, turnkey; the gap at the typical prices is $170,000.
Renting in Townsville
In the ABS 2021 Census 38.3% of homes in Townsville were rented, against 30.6% across Australia. Of the 15 cities we cover, only Darwin has a higher share of renters.
These answers use the prices in the table on this page.
Local figures: Australian Bureau of Statistics, 2021 Census QuickStats, Townsville.
What Affects Granny Flat Costs in Townsville
Kit, studio or two bedrooms
Transportable units are a common search here, and the delivered price of $80,000–$120,000 stops when the truck leaves: footings, tie-downs, steps and service connections are extra. A builder's turnkey studio runs $110,000–$160,000 with all of that included. Two bedrooms at about 60 m² cost $140,000–$210,000, and a custom two-bedder with premium finishes $210,000–$320,000.
Council's 90 m² ceiling
Townsville City Council allows one secondary dwelling per property, capped at 90 m² of gross floor area excluding a single carport or garage, and in a residential zone the flat has to stand no more than 20 m from the principal dwelling. Meet those acceptable outcomes and no development application is needed. Built right up to the cap at $2,300–$3,500 a square metre, a flat would cost $207,000 to $315,000.
Engineered for cyclones
Queensland's cyclone preparedness guide puts Townsville in Wind Region C and says homes there should withstand a Category 4 storm, with gusts near 250 km/h. Ask every builder and kit supplier which wind classification their plans are engineered for, since a design drawn for a milder region must be reworked. Region C also switches off the state's approval exemption for small class 10 buildings, so even a little shed or carport beside the flat needs building approval.
Adding a garage
Add a single lock-up garage under the same roof and the all-in price, approvals and site costs counted, becomes $170,000–$260,000. The garage sits outside the 90 m² floor-area cap. In a cyclone area its door has to comply with AS/NZS 4505, the standard for wind-rated garage doors, so check the door in the quote carries the right wind rating for your address.
Letting it out
Under Queensland planning law any tenant may rent a new secondary dwelling on a long-term lease, family or not. Townsville City Council does not allow it to be used for short-term accommodation, and it can never be subdivided or separately titled. The median rent across Townsville was $310 a week (ABS 2021 Census), and a landlord who adds solar to a let flat can claim the state's Supercharged Solar for Renters rebate of up to $3,500.
Licence, warranty and deposit
From $3,300 a builder needs a QBCC licence and the job needs home warranty cover, a line every complete build in our table clears easily. Above $20,000 a builder can ask for no more than 5% up front. One exception lifts that to 20%: when off-site prefabrication accounts for over 50% of the contract price, which can be the case with a transportable unit.
Building around the wet
January to March bring most of Townsville's rain, with February the wettest month at 312.4 mm, and BOM's cyclone months are November through April. From June to October the city is close to dry, down to 9.9 mm in September (BOM averages). Footings, slab pours and the trenching behind $15,000–$40,000 go faster on dry ground, so time the start for when the wet has passed.
How to Save Money on Granny Flat Cost in Townsville
Frequently Asked Questions — Granny Flat Cost in Townsville
Our Methodology
The prices on this page are compiled from publicly available cost guides, leading tradie marketplaces, peak industry body data, and individual builder websites across Australia. We cross-reference ranges from several sources and adjust for city-specific cost differences using advertised rates, wage data, and cost-of-living indicators. Our guides are produced independently — no tradesperson can influence a published figure. All prices are estimates and vary with your specific job, so always get multiple quotes. Last reviewed October 2026. Read our full methodology →