Mould Removal Cost Calculator & Price Guide
Mould removal costs in Australia can vary a lot depending on where the mould is and how deep the damage goes. Using this mould removal cost calculator, a typical mould removal service starts from about $720 AUD for a bathroom with surface mould and can reach up to around $7,560 AUD for roof space or subfloor mould remediation inside the wall. If you're wondering how much does mould removal cost, the main drivers are the area type, the extent of contamination and whether simple mould treatment is enough or full remediation is needed.
Estimate mould removal cost
Remediation midpoints per area in Australia. Rates cover surface mould that can be cleaned and treated. Mould inside a wall, or a roof space, costs more. Fixing the leak that caused it is usually extra.
Estimates are indicative only. For an accurate price, get free quotes from local tradies above.
Compare installers on our Mould Remediation hub & request quotes when you're ready.
Mould Removal Price Breakdown
Typical job based on 1 area (On the surface). Prices are supply-and-install midpoints — actual quotes will vary.
| Type | Cost per area (On the surface) | Typical 1 area (On the surface) job |
|---|---|---|
| Bathroom | $900 | $900 |
| Bedroom or living room | $1,200 | $1,200 |
| Roof space or subfloor | $4,500 | $4,500 |
What Affects Mould Removal Cost?
- Area being treated: The type of space has the biggest impact on mould removal cost. A bathroom is priced at $900 per area, a bedroom or living room at $1,200 per area, and a roof space or subfloor at $4,500 per area before any depth adjustments.
- Depth of mould damage: Surface mould is costed at the base rate, but deeper contamination increases the price. If plaster needs to come off, the rate is multiplied by 1.2, and if the mould is inside the wall, the rate is multiplied by 1.4.
- Number of affected areas: This calculator is based on the number of areas that need treatment. Each additional area adds another full per-area rate, so total mould remediation cost rises in line with the job size.
- Minimum job charge and estimate range: Displayed estimates use a range of plus or minus 20% around the midpoint price. There is also a minimum job charge of $600 AUD if the calculated amount would otherwise fall below that threshold.
Mould Removal Cost - Frequently Asked Questions
For one area, surface mould removal typically starts at $900 AUD for a bathroom, $1,200 AUD for a bedroom or living room, and $4,500 AUD for a roof space or subfloor. The displayed estimate range is 20% below to 20% above the midpoint, so that works out to $720 to $1,080 AUD for a bathroom, $960 to $1,440 AUD for a bedroom or living room, and $3,600 to $5,400 AUD for a roof space or subfloor.
Where plaster needs to come off, the base per-area rate is multiplied by 1.2. That makes the midpoint $1,080 AUD for a bathroom, $1,440 AUD for a bedroom or living room, and $5,400 AUD for a roof space or subfloor, with displayed ranges of $864 to $1,296 AUD, $1,152 to $1,728 AUD, and $4,320 to $6,480 AUD respectively.
Black mould removal is priced according to the affected area and how deep the contamination goes rather than colour alone. For one area on the surface, expect a midpoint of $900 AUD in a bathroom, $1,200 AUD in a bedroom or living room, or $4,500 AUD in a roof space or subfloor, before applying the estimate range of ±20%.
A bedroom or living room is priced at $1,200 AUD per area for surface mould removal. If plaster needs to come off, the midpoint increases to $1,440 AUD, and if the mould is inside the wall, it rises to $1,680 AUD, with displayed ranges of $960 to $1,440 AUD, $1,152 to $1,728 AUD, and $1,344 to $2,016 AUD.
For one bathroom with ceiling and wall surface mould, the midpoint price is $900 AUD per area. The displayed estimate range is $720 to $1,080 AUD, and if the job goes deeper, the midpoint becomes $1,080 AUD where plaster needs to come off or $1,260 AUD if the mould is inside the wall.
A contained clean of a roof space or under the house is priced at $4,500 AUD per area for surface mould remediation. If plaster needs to come off, the midpoint becomes $5,400 AUD, and if the mould is inside the wall, it increases to $6,300 AUD, with displayed ranges of $3,600 to $5,400 AUD, $4,320 to $6,480 AUD, and $5,040 to $7,560 AUD.
Ready for real quotes?
We match you with vetted mould remediation installers in your area.
Go to Mould Remediation hub →