How often should you repaint a house exterior in Perth?
30 May 2026 · 3 min read
Service-life ranges by substrate and exposure, the signs that you are early or late, and why one elevation may need doing before the rest.
There is no single answer, because two houses a kilometre apart in Perth can be in genuinely different environments. But there are reliable ranges, and there are signs that tell you where you are in the cycle.
Realistic service life
Years before a repaint is due, Perth metro
Best case in the metro area
Dark absorbs more, moves more
Salt shortens everything
Movement opens joints
The hardest combination
Thin sections, high exposure
Factory finish lasts, once repainted less
These assume a properly prepared previous job using a quality product. A cheap repaint over poor preparation can fail in three years regardless of substrate.
The four things that move the number
**Exposure.** Coastal salt is the single biggest factor. Cottesloe, City Beach, Scarborough and the Mandurah waterfront run at the short end of every range. Midland, Ellenbrook and Canning Vale run at the long end.
**Orientation.** North and west take the UV. It is entirely normal for those two elevations to need attention three or four years before the south side does.
**Colour.** Dark colours absorb more heat, expand and contract more, and fade more visibly. A charcoal render on a west wall is the shortest-lived combination in common use.
**Preparation on the last job.** More than product, more than colour. A well-prepared surface with a mid-range paint outlasts a poorly prepared one with a premium product, every time.
Signs you are due
- Chalking heavy enough to mark your hand
- Colour visibly different between elevations
- Hairline cracking in the film, especially on render
- Gloss gone from trim and doors
- Any bare substrate showing at edges, corners or fixings
- Caulking split at joints and around window frames
Signs you are late
- Peeling or flaking in sheets
- Timber greying or softening where the coating has gone
- Rust bleeding from fixings or steel lintels
- Render sounding hollow when tapped
- Water staining on internal walls below a window or roofline
The transition from "due" to "late" is the expensive one. Once the substrate is exposed, you are no longer buying a repaint — you are buying repairs plus a repaint, and the repairs can easily exceed the painting.
Staging is legitimate
You do not have to do all four elevations at once. Doing the north and west when they need it, and the south and east one cycle later, spreads the cost and matches the actual wear. The only caution is colour: a repaint next to a five-year-old coating in the same colour will not match exactly, so plan the break at a corner.
The cheapest maintenance there is
Wash the house. A wash every couple of years removes the salt and grime that accelerate film breakdown, and it costs a fraction of a repaint. On coastal properties it can add a year or two to the cycle on its own — the closest thing to free time you will get on an exterior.