Cost Guide · Brisbane · 2026
Damp quotes are notoriously opaque, so here are the real numbers. Prices are indicative ranges for inner-Brisbane homes — every wall differs, which is why the on-site assessment and fixed written quote are free.
The numbers
| Treatment | Typical range | Priced by |
|---|---|---|
| Chemical DPC injection | $200 – $400 / linear metre | Metres of wall treated; wall thickness |
| Salt damp repair (strip & re-render) | Quoted per wall, usually bundled with DPC | Area of contaminated plaster |
| Subfloor ventilation | $900 – $3,500 installed | Subfloor size; passive vs ducted fans |
| Lateral damp (tanking & drainage) | Wide range — simple fixes to full tanking | Whether the ground can be moved or must be sealed |
| Specialist inspection & written quote | Free | — |
Putting it together: a single treated wall usually lands in the low thousands. A typical multi-wall job on a pre-war home with salt-damaged plaster commonly runs $4,000–$15,000. Large heritage homes needing extensive desalting and re-rendering can go beyond that — which is exactly why a hard written number matters before you commit, or before you negotiate on a purchase.
Wall length and thickness — double-brick takes more product and time than single-skin. How far the salt damage has spread — stripping and re-rendering is often a bigger line item than the injection itself. Access — injecting from outside at ground level is quick; working inside built-in rooms or tight under-crofts is slower. Heritage detail — matching original render profiles and protecting old brick adds care and cost, but protects the home's value.
The failure pattern is always the same: paint or skim over the damage without stopping the moisture, or inject a DPC without treating the salts. It looks fixed for a few months, then the blistering returns — and you pay twice. A proper repair is: stop the source, remove the contamination, re-render with salt retardant, warranty the lot. That's the sequence every quote we issue is built on.
Common questions
Because the price is driven by things that have to be measured: linear metres of affected wall, wall construction, how high the salt contamination reaches, and access. What we can do is give you the ranges above straight away, then a fixed written figure after the free on-site assessment — usually the same visit.
Yes — the written quote is the price, itemised by treatment. If something genuinely unforeseeable turns up mid-job (it's rare), nothing extra proceeds without your written approval first.
That's one of our most common jobs. We inspect the property, confirm whether the flagged damp is real and how far it goes, and give you the written figure to negotiate with. See the rising damp inspection page — and tell us your contract deadline when you call.
Generally no — home insurance treats rising damp as gradual deterioration rather than a sudden event, so it's excluded by most policies. Flood-related subfloor moisture is sometimes different depending on your flood cover; check your policy wording.
Free on-site assessment, fixed itemised quote, 20-year warranty on the work. Tell us what you're seeing.
We connect you with QBCC-licensed damp specialists servicing inner Brisbane. No obligation, no cost for the assessment.
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