Real prices per linear metre, what a full job costs by property type, and what every quote should include — from Rising Damp Sydney's licensed specialists. Free inspection and fixed upfront quote on every job.
Call 02 9158 9901Rising damp treatment in Sydney typically costs $150–$400 per linear metre for chemical damp-proof course injection — the standard fix for most brick homes. Most residential jobs land between $800 and $3,500 depending on the length of wall affected and whether replastering is needed. Larger multi-wall terrace jobs run $4,000–$8,000+, and heritage properties needing a mechanical damp course cost significantly more. Rising Damp Sydney provides a free inspection and a fixed upfront quote, backed by a lifetime workmanship guarantee — you know the exact price before any work starts.
| Treatment | Typical cost | Best for |
|---|---|---|
| Chemical DPC injection | $150–$400 /lm | Most brick homes — the standard fix |
| Salt-retardant replastering | $80–$150 /lm | Required after any DPC treatment |
| Subfloor ventilation system | $600–$2,500 | Under-floor moisture and musty smells |
| Mechanical DPC replacement | $800–$1,500 /lm | Heritage stone and very thick walls |
| Skirting replacement | $40–$200 /lm | Damp-damaged skirting boards |
| Damp inspection & diagnosis | Free | Every Rising Damp Sydney job starts here |
Damp is usually concentrated on one or two walls plus a hallway. Shared party walls and rear additions are the common trouble spots in Inner West and Eastern Suburbs terraces.
The original slate or bitumen damp course has often broken down after a century. Double-brick walls take longer to inject and use more product — budget the upper end of the per-metre range.
Often no original DPC at all, with thick irregular walls where injection alone may not be enough. These jobs need proper diagnosis first — which is exactly why our inspection is free.
What looks like rising damp here is often a leak, bridged DPC or subfloor condensation. Fixing the real cause can be a simple drainage or ventilation job — not a full damp course.
Wall length and thickness. Cost scales per linear metre, and double-brick or stone walls take more product and more time than single-skin brick.
Brick density. Dense clay brick, common in older Sydney homes, absorbs injection fluid two to three times slower than soft sandstock brick — that's labour time on the job.
Access. Walls behind built-in joinery, on boundary lines, or in tight subfloor spaces cost more to treat.
Salt contamination. Years of rising damp leave hygroscopic salts in the wall. If contaminated plaster isn't stripped and replaced with salt-resistant render, the wall keeps weeping even after a successful damp course. Quotes that skip this step are cheaper for a reason.
How long it's been left. Early-stage damp on one wall is a fraction of the cost of a full-perimeter treatment with rotted skirtings and failed render.
Common failure patterns we're called to fix: cream injected into walls too thick for full permeation, no replastering so salts keep drawing moisture, and misdiagnosis where the "rising damp" was actually a leaking shower or blocked subfloor vents. We diagnose first, match the method to your wall construction, and back the work with a lifetime guarantee — so it's done once.
Chemical DPC injection costs $150–$400 per linear metre in Sydney depending on wall thickness, brick density and access. Salt-retardant replastering adds roughly $80–$150 per linear metre on top.
Most residential jobs range from $800 to $3,500 depending on the size of the affected area, treatment method and whether replastering is needed. We inspect free of charge and give you a fixed upfront quote before any work starts.
Most Sydney terraces cost $3,000–$8,000 depending on how many walls are affected and whether replastering is included. Severe full-perimeter cases can exceed $10,000.
Generally no. Rising damp is classed as gradual deterioration or a maintenance issue, which standard home insurance policies exclude. Sudden water damage from a burst pipe is treated differently.
DIY injection creams are sold at hardware stores, but the failure rate is high — the barrier only works if fluid fully permeates the wall, holes are drilled at the correct height and spacing, and salt-contaminated plaster is replaced. A failed DIY job usually costs more to remediate than professional treatment would have.
Yes. Visible damp is one of the most common issues flagged in pre-purchase building reports and gives buyers negotiating leverage well beyond the repair cost. Treating it before sale — with our transferable lifetime guarantee — protects your price.
No. Without a functioning damp-proof course, ground moisture keeps wicking up the wall, and it worsens over time as salts accumulate and render breaks down.
Every wall is different — construction, thickness, salt load and access all change the price. Rising Damp Sydney inspects free, confirms it's genuinely rising damp, and gives you a fixed itemised quote backed by a lifetime workmanship guarantee.
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