Wellington Central
Aro Valley
House washing in Aro Valley, Wellington's dampest microclimate, 12-month wash cycle.
Cleaning in Aro Valley
Aro Valley is the suburb in central Wellington where the soft-wash plus biocide combination makes the most demonstrable difference. The damp microclimate is not going to change, but the cleaning interval can be managed predictably with the right chemistry. Standard Wellington rates apply, and Aro Valley schedules well alongside Kelburn and Brooklyn jobs.
Housing in Aro Valley
Aro Valley is a south-facing valley suburb with a notably damp microclimate, heritage timber houses on Aro Street, Holloway Road, and Devon Street sit in shade for much of the day, meaning mould and moss accumulate significantly faster than the Wellington average. A 12-month wash cycle with biocide treatment is the standard approach here.
Common issues we see in Aro Valley
- South-facing valley walls accumulate mould and moss within 10–12 months without exception
- Shaded sections under the valley ridgeline rarely dry fully between rain events
- Heritage timber on Aro Street and Holloway Road requires soft wash, no high pressure
- Biocide treatment post-wash dramatically slows mould regrowth on the dampest sections
- Valley-bottom paths and driveways develop heavy moss and algae year-round
- Overhanging vegetation from steep valley sides deposits organic matter continuously onto roofs
Aro Valley earns its reputation. The south-facing valley, Aro Street and Holloway Road running along the valley floor, Devon Street climbing the western side, sits in shade for most of the day, and Wellington’s rainfall doesn’t evaporate quickly down here. Surfaces stay damp. Mould finds ideal conditions. The cycle is faster here than anywhere else in the central suburbs.
James has been cleaning in Aro Valley since before it became fashionable to live there. The approach is consistent: soft wash on the heritage timber cladding, these are typically 1900s to 1930s weatherboard houses, zero high-pressure work, followed by biocide application to the cleaned surfaces. The biocide inhibits regrowth at the surface level and genuinely extends the clean by several months in this microclimate. Without it, some of the shadiest Holloway Road properties start showing visible mould again within six months.
The 12-month wash cycle is not a sales pitch for Aro Valley, it’s just what the valley’s conditions require. Most properties on an annual schedule stay looking consistently clean rather than cycling through the dramatic before-and-after swing you see with longer intervals. Standard Wellington rates apply.
Aro Valley before & after
Real jobs in Aro Valley.
during 
FAQ
Aro Valley, common questions
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Why does mould come back so fast in Aro Valley?
Aro Valley's geography, a south-facing valley with steep shaded sides, means surfaces stay damp for longer after rain. The valley walls see limited direct sunlight, so mould and moss find ideal growing conditions almost year-round. The honest answer is: it's not going away, but regular treatment (every 12 months) keeps it manageable, especially when a biocide is applied after washing.
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What is biocide treatment and do I need it?
Biocide is a residual anti-mould and anti-algae treatment applied to cleaned surfaces after soft washing. On a standard Wellington home it extends the clean by several months. In Aro Valley's microclimate, it's genuinely worthwhile, the damp, shaded conditions mean untreated surfaces re-mould faster than anywhere else in central Wellington.
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Do you work on the heritage properties in the valley?
Yes. The older timber homes on Aro Street and Devon Street are typical heritage Wellington weatherboard, soft wash only, no high pressure. James has been through the valley properties regularly since 2001 and knows which sections carry the most mould load.
Nearby suburbs
Other wellington central we cover.
Ready for a cleaner property?
Most quotes are back within a few hours, sometimes the same afternoon. Fill in the form, James will take a look at your address, and you'll get a straight price with no obligation.