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How we estimate cladding replacement cost

Every estimate combines a national price for each part of the job with a local labor adjustment for your state. Here is exactly how that works and where the numbers come from.

The formula

For each line item we multiply a quantity (driven by your exterior wall area, number of storeys, cladding material, and whether the old cladding is removed) by a national unit cost, then apply a quality-grade factor. A regional labor multiplier is applied to the labor portion only — materials are priced nationally. We show the itemized result as a ±18% range.

National unit costs

Line itemNational unit costSource
Old siding removal$11.00 / m²ref
House wrap / weather barrier$5.50 / m²ref
Siding material$38.00 / m²ref
Installation labor$43.50 / m²ref
Trim, corners & wrap$54.00 / m²ref
Disposal$2.70 / m²ref

Regional labor multipliers

Each state's labor multiplier is its private-sector all-industry full-time adult ordinary-time weekly earnings relative to the national private-sector mean, from ABS Average Weekly Earnings (November 2025, Table 14, by state) — used as a proxy for construction labour because Australia publishes no carpenter-by-state (ANZSCO 331212) earnings series in public form, and the private-sector cut strips out the public-service distortion that inflates all-industry figures in the ACT. Multipliers are bounded to a sane range and applied to the labor share of each line item, so materials stay nationally priced while labor tracks local wages.

Data vintage & limitations

Compiled June 2026 from public cost aggregators and government wage data — these are derived estimates, not live contractor quotes. Local prices vary with project complexity, access, and material availability; always confirm with a licensed contractor before budgeting.

Sources