What changes the price
| Factor | Why it matters |
|---|---|
| Size and height | Larger and two-storey homes take longer and may need more safety planning |
| Access | Steps, steep sections and narrow side paths slow the job down |
| Build-up | Heavy moss, lichen and black streaks may need treatment |
| Surfaces | Weatherboard, plaster, concrete and timber need different methods |
| Add-ons | Paths, decks, gutters, roofs and windows are often priced separately |
Photos that help
- Each side of the house, including the full height
- Paths, patios and decks you want cleaned
- Steps or tight access
- Close-ups of moss or staining
Questions to ask any contractor
- What exactly is included, and what is extra?
- Which surfaces get a soft wash, and which get water blasted?
- Are you insured?
- What happens if rain delays the job?
See our water blasting and house washing service.
Updated 3 November 2026. General information.