How much does a granny flat cost in Wollongong?
Granny flat prices in Wollongong run $110,000–$160,000 for a turnkey 1-bedroom build (35–45m²) and $140,000–$210,000 for a 2-bedroom (~60m²), with prefab/kit units from about $80,000 supplied. That’s roughly $2,300–$3,500/sqm for a turnkey build, depending on design, site and finishes.
Detailed Pricing — Granny Flat Cost in Wollongong 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 |
| Approvals, full package (CDC + private certifier) | $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 Wollongong quotes →Prices include GST. Based on Wollongong metro area, October 2026. Outer suburbs may vary.
Wollongong’s Granny Flat Market in 2026
Granny flats in NSW are allowed in residential zones R1 to R5, and to go through as complying development the lot must be at least 450 m²; on a smaller lot, or where the flat fails the standards, a development application can still go to council.
The floor-area test is wider than the flat itself: it counts the main house, the granny flat and any attached carport, garage, deck, patio, pergola or verandah. 71.3% of Wollongong dwellings were separate houses at the 2021 Census.
For anyone pricing a kit: the table’s nearest row is a delivered one-bedroom prefab at $80,000–$120,000; a turnkey studio or one-bedroom is $110,000–$160,000 and a turnkey two-bedroom $140,000–$210,000.
How Granny Flat Costs Vary Across Wollongong
Northern Suburbs
Typical cost: $180k–$330k turnkey
Thirroul, Austinmer, Bulli, Woonona. Beachside blocks between escarpment and sea; slope and access add site-works cost. High land values and strong rental demand.
Central Wollongong
Typical cost: $150k–$280k turnkey
Wollongong, North Wollongong, Fairy Meadow, Gwynneville. Established suburbs near the city and beaches with workable blocks. Detached 2-bed builds are popular.
Western Suburbs
Typical cost: $150k–$280k turnkey
Figtree, Mount Keira, Mount Ousley, Kembla Grange. Escarpment-side blocks often slope, needing engineered slabs and retaining — a key cost factor.
Southern Suburbs
Typical cost: $120k–$230k turnkey
Dapto, Horsley, Albion Park, Oak Flats. Growth suburbs on flatter blocks with easier access. Best value and strong yields.
Shellharbour & Kiama
Typical cost: $160k–$300k turnkey
Shellharbour, Shell Cove, Kiama, Gerringong. Coastal family and holiday suburbs with strong rental demand. Detached builds with coastal detailing.
What You’ll Actually Pay — Common Wollongong Granny Flat Builds
Wollongong granny flats, each priced from this page’s rows.
1-bedroom granny flat — 40m², turnkey
$110,000–$160,000 total
Typical turnkey studio or one-bedroom: $130,000. The approvals row ($3,000–$12,000) covers a complying development certificate and certifier.
2-bedroom granny flat — 60m², turnkey
$140,000–$210,000 total
A 60 m² two-bedroom flat at the typical $175,000; on a lot under 450 m² expect a development application instead of the fast route.
Prefab / modular 2-bed — installed
$80,000–$120,000 delivered (1-bed row)
A delivered prefab or kit flat is $80,000–$120,000 for one bedroom — the only prefab row — before slab, site works ($15,000–$40,000) and approval.
Garage / outbuilding conversion to studio
$40,000–$120,000 total
Converting a garage: $40,000–$120,000, or about $100,000 under a new two-bedroom at the typical prices.
Custom architect 2-bed / two-storey
$210,000–$425,000 total
Custom two-bedroom with high-end finishes $210,000–$320,000; two-storey or with a garage $280,000–$425,000. Both sit under the same floor-area test as any other granny flat.
What Affects Granny Flat Costs in Wollongong
Build method
Prefab or modular units (from ~$80,000 delivered) are cheapest; standard site-built homes are mainstream; custom and two-storey designs cost the most.
Size & bedrooms
A 1-bed (35–45m²) runs $110,000–$160,000 turnkey; a 2-bed (~60m²) $140,000–$210,000.
Site works & access
A flat, clear, easy-access block is cheapest; slope, rock, tight access and craneage can add $15,000–$40,000 in site works.
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 NSW a secondary dwelling up to 60m² on a 450m²+ block can be approved as Complying Development (CDC) through a private certifier in around 20 days, rather than a full DA.
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 Granny Flat Cost in Wollongong
Frequently Asked Questions — Granny Flat Cost in Wollongong
Our Methodology
Our pricing comes from a mix of sources — public cost guides, tradie marketplaces, peak-body rate data, and individual builder sites — cross-referenced and then adjusted for regional cost differences. We produce these guides independently, and no tradesperson can buy their way onto the page or sway a figure. Every price is an estimate that will move with the details of your job, so we always recommend getting multiple written quotes. Last reviewed October 2026. Read our full methodology →