What's Included
A standard plaster repair covers:
- Assessment of damage type and extent (cracks, holes, water damage, sagging sections)
- Cutting back damaged material and preparing the substrate
- Patching or re-sheeting with plasterboard, or re-skimming with wet plaster, finished to AS/NZS 2589:2017 Gypsum Linings Level 4 standard (the accepted finish level for domestic painting)
- Jointing compound application (base coat, then topping coat), tape embedding, sanding, and finishing to a paint-ready surface
- Dust containment and cleanup
Materials are a relatively small portion of the total cost. A CSR Gyprock 1200x900mm repair panel runs about $21 from Bunnings. Jointing compound adds $40 to $55 per job (Gyprock Base Coat 45 at ~$40/10kg, or Gyprock Easy Flow All Purpose at ~$54/15kg). Knauf LiteFinish topping compound sits at ~$52/18kg. The real cost driver is labour and finishing time, particularly where texture matching or ceiling work is involved.
Ceiling repairs attract a 20–30% premium over equivalent wall work because of overhead access. The plasterer works slower, needs scaffolding or a baker's scaffold for anything above standard 2.4m height, and compound application is physically harder upside-down.
Compound Types and What They Do
Understanding what your plasterer is working with helps you evaluate quotes and spot shortcuts. The compound system is a multi-step process, not a single product.
| Compound Type | Product Examples | Price | Purpose |
|---|---|---|---|
| Base coat (setting) | Gyprock Base Coat 45, Knauf Basecoat 60 | $40–$55/10–15kg | Fast-setting powder compound. Embeds joint tape, fills gaps, builds thickness. Sets by chemical reaction (45 or 60 minutes working time). |
| All-purpose (pre-mixed) | Gyprock Easy Flow, Knauf All Purpose | $38–$54/15–18kg | Can be used for all coats but trades off performance at each stage. Convenient for small repairs. |
| Topping / finishing | Gyprock CSR Topping, Knauf LiteFinish | $28–$52/10–18kg | Lightweight, easy to sand. Applied as the final coat before painting. Creates the smooth, paint-ready surface. |
| Rapid repair | Gyprock Pro-Repair 10 | ~$25/1.5kg kit | 10-minute setting time. Designed for single small patches. Includes compound, tape, and sandpaper. |
A professional plasterer typically uses a base coat for the first pass (embedding tape and building up), then a topping compound for the finish coats. All-purpose compound is a compromise product: acceptable for small DIY patches, but a dedicated two-product system gives a better result on visible surfaces.
Finish Levels Under AS/NZS 2589
The Australian standard defines three finish levels for plasterboard linings. Your plasterer should be finishing to the level that matches the final decoration.
- Level 3. Joints taped with two coats of compound. Suitable only for concealed areas (above ceilings, inside service shafts) that will never be seen.
- Level 4. Three-coat system: tape coat plus two subsequent coats over joints and fastener heads. This is the standard for all domestic painting and the minimum your repair should meet. Any competent plasterer delivers Level 4 as standard.
- Level 5. Level 4 plus a full skim coat over the entire surface. Specified where critical lighting (raking light, downlights, glossy paint) would show joint lines through a Level 4 finish. Adds $15–$25/m2 over Level 4.
For patch repairs, the relevant question is whether the finished surface will be visible under the room's lighting conditions. A patch on a hallway wall under normal lighting needs Level 4. A feature wall with downlights angled across it may need the repaired section skim-coated to Level 5 to avoid a visible patch line.
What Affects the Cost
- Number and size of repairs. A single fist-sized hole is a minimum-charge job (most plasterers have a $150–$300 minimum callout). Multiple patches across several rooms scales the cost, but the per-patch rate drops as setup time is amortised.
- Ceiling vs wall. Ceiling work takes longer because the plasterer is working overhead. Sagging ceilings may need structural support assessment before patching, and full sheet replacement runs $50–$90/m2 installed.
- Plasterboard vs lath-and-plaster. Modern plasterboard repairs are straightforward. Lath-and-plaster walls (common in pre-1960s homes) are specialist work requiring different techniques: re-keying plaster to timber laths, lime-based compounds for heritage substrates, and longer drying times between coats.
- Water damage. If the leak source has not been fixed, patching is pointless. Where water has compromised the substrate (swollen paper face, delaminated core), larger sections need cutting out and replacing rather than surface patching.
- Texture matching. Smooth walls are easier to blend. Textured finishes (stipple, knockdown, orange peel) are harder to match on a patch, and a poor texture match can look worse than the original damage. Some homeowners opt to skim-coat the entire wall or ceiling rather than attempt a spot-match.
- Asbestos risk. Homes built before 1990 may have asbestos-containing flat sheets, textured coatings, or fibro cladding. Disturbing these without testing is a health and legal risk. Licensed asbestos removal adds $1,500–$3,000 for a room before the plasterer even starts.
- Cornice damage. Simple cove cornice repair runs $5–$10 per linear metre. Ornate Victorian or Federation profiles can reach $50–$180 per linear metre for moulding and matching.
A single plasterboard patch in a modern home with good access sits toward $200. Multiple rooms with ceiling damage, lath-and-plaster walls, water damage requiring substrate replacement, texture matching, and cornice restoration pushes toward $1,500.
City and Regional Price Comparison
Prices vary across Australia based on labour rates, housing stock, and the prevalence of older construction methods.
At the city level, Sydney is the baseline at $200–$1,500 per job. Melbourne tracks close to Sydney pricing, with higher costs in inner suburbs where lath-and-plaster and reactive clay cracking are common. Brisbane tends to sit slightly lower for standard plasterboard repairs, though Queenslander homes with VJ board ceilings and humidity-driven damage add complexity. Perth and Adelaide typically run 10–15% above eastern capitals, reflecting higher trade rates and smaller trade pools.
Within any city, property age is the strongest cost predictor. Inner-city suburbs with pre-war housing stock (terraces in Balmain, period homes in Fitzroy, character homes in Norwood) tend toward the higher end because lath-and-plaster walls, heritage finishes, and older substrates are more labour-intensive to repair. Newer suburbs with standard plasterboard construction are more predictable and cost-effective. Properties built in the 1970s to 1990s fall in the middle: plasterboard construction, but potentially with textured finishes or asbestos-containing materials that add complexity. Once the plaster repair is complete, you will need painting to finish the job, which is typically quoted as a separate trade.
How We Calculate
Estimates are based on surveyed trade rates for plasterers across Australian capitals, adjusted for each state, property age bracket, and wall construction type. All prices include GST. Figures cover standard residential plaster repairs. Commercial properties, heritage restoration, and full ceiling replacements may fall outside these ranges. The AWCI (Association of Wall and Ceiling Industries) publishes technical guidelines that inform industry best practice.