What's Included in the Price
- Supply of cornice in the specified profile (cove, decorative stepped, ornate heritage, or custom-matched)
- Cutting, fitting, and fixing at the wall-ceiling junction with cornice cement and mechanical fasteners
- Mitring internal and external corners
- Filling, sanding, and finishing all joins to a paint-ready surface per AS/NZS 2589:2017 Gypsum Linings
Ceiling roses are priced separately per piece ($250–$470 for decorative plaster roses, plus $80–$150 installation). Painting after installation is a separate scope. For replacement jobs, removing the old cornice and repairing the junction underneath adds $3–$6 per linear metre.
Material costs for standard cove are modest even in Adelaide: a 55mm Gyprock cove cornice runs around $9 per 3m length (~$3/m), with Gyprock Cornice Cement at ~$55 per 20kg bag. Labour is the dominant cost factor, particularly for ornate profiles where complex mitres and multi-step finishing push per-metre rates to $15–$25+.
What Affects the Cost
- Profile type. Standard 55mm cove ($3–$4/m supply, $5–$10/m install) is the baseline. Ornate Victorian profiles found in Adelaide's character homes ($15–$40/m supply, $15–$25/m install) cost significantly more due to complex mitre work and extra finishing. Decorative stepped profiles like the Gyprock Canto or Knauf Sydney ($8–$10/m supply) sit between basic and ornate.
- Heritage matching. If you need to match existing cornice in a character home and the profile is no longer manufactured, custom moulding is required ($200–$500 for mould creation, $40–$80+/m for the run). Adelaide's character home density means this is a more common request than in Perth, though less frequent than in Melbourne.
- Square-set conversion. Removing cornice and finishing the junction to a clean right angle requires Level 5 finishing under AS/NZS 2589 ($12–$20/m). It is more labour-intensive than installing cove cornice.
- Number of rooms. Multiple rooms reduce the per-metre rate. A single room carries a minimum charge ($250–$400).
- Ceiling height. Character homes in Adelaide's inner suburbs often have ceilings above 2.7m, adding working-at-height time and sometimes scaffolding costs ($100–$300/day). Standard 2.4m in modern homes is more efficient.
- Old cornice removal. Pulling off old cornice reveals the junction beneath, which invariably needs repair before new cornice can go on.
Simple cove cornice in a single modern room sits toward $150. Ornate heritage cornice across multiple rooms in a character home, with custom profile matching, old cornice removal, ceiling roses, and high ceilings pushes toward $1,300.
Adelaide-Specific Considerations
Character homes and heritage cornice (Norwood, Unley, Prospect, North Adelaide, Goodwood, Colonel Light Gardens). Adelaide's inner ring has a high concentration of Victorian and Edwardian homes with decorative plaster cornices and ceiling roses. These features are part of what makes the homes desirable, and homeowners generally want to preserve or restore them. When renovating, the common challenge is matching new cornice to existing. If you are restoring a water-damaged section of cornice in one room, or extending cornice into a new room that adjoins an original room, the profiles need to match. Adelaide has specialist plasterers who can make custom moulds from existing samples, though the pool of heritage cornice specialists is smaller than in Melbourne or Sydney. Allow extra lead time (three to four weeks for booking) if your project involves heritage matching.
Heritage conservation zones. For homes in Adelaide's heritage conservation zones, cornice changes may require council approval. This is particularly relevant if you are considering removing ornate cornice and converting to square-set in a character home. The council may require retention of original plaster features as a condition of the heritage listing. The City of Norwood Payneham & St Peters and the City of Unley both have specific heritage guidelines that cover interior plaster features in contributory buildings. Check with your council's heritage advisor before removing any original cornice work.
Modern suburbs (Mawson Lakes, Seaford, Craigburn Farm, Golden Grove, Mount Barker). In newer homes, cornice work is standard: 55mm or 75mm Gyprock cove, or a square-set finish. Standard ceiling heights, plasterboard construction, and uniform openings make this straightforward and competitively priced. For homeowners wanting something between basic cove and full ornate, Gyprock's decorative range (Symphony at ~$8/m, Canto at ~$9/m) offers stepped and curved profiles that add visual interest without specialist costs.
Adelaide's dry climate. Unlike Brisbane, Adelaide's low humidity is ideal for cornice cement curing. Standard Gyprock Cornice Cement sets predictably, and there is less risk of moisture-related adhesion issues. The exception is during extreme heat waves (40+ degree days in January and February), when rapid drying can affect the finishing quality of joints if the plasterer is not managing conditions carefully.
Hiring a Licensed Plasterer in SA
In South Australia, Consumer and Business Services (CBS) administers building work contractor licences. Plastering work that constitutes building work requires a Building Work Contractor's Licence.
Worth checking:
- A current SA building work contractor licence (verify on the CBS licence search)
- Examples of completed cornice work, especially mitred corners (corners are where quality shows)
- For heritage matching, confirmed experience with period profiles and custom mould-making
- For square-set or shadowline, demonstrated Level 5 finishing capability under AS/NZS 2589
- A written quote specifying the profile type and size, number of rooms, linear metres, and whether old cornice removal is included
- Public liability insurance
Adelaide has a smaller trade pool than Melbourne or Sydney. In the character home suburbs, word of mouth is particularly effective for finding heritage cornice specialists. For standard cove or square-set in a modern home, any competent plasterer with a Cert III in Wall and Ceiling Lining can handle the work.
How We Calculate
Estimates are based on current plasterer rates in the Adelaide metropolitan area, adjusted for property age and typical cornice styles in SA. All prices include GST. Figures cover standard residential cornice installation including supply, fitting, and finishing to a paint-ready surface. Heritage restoration with custom-moulded profiles may exceed these ranges.