House washing cost in Adelaide

By the WTD team · Updated October 2026

A full exterior house wash in Adelaide runs $230 to $645 (typical $385) for a single-storey home and $415 to $1,000 (typical $690) for double storey. Size and height set the base price - but the method the job actually needs matters just as much, because the wrong technique on render or cladding can turn a cheap wash into a repaint.

Quick answer — house washing cost in Brisbane

Here's where a full exterior house wash lands in Adelaide in 2026, before we get into method and what changes the number.

Most single-storey Adelaide homes land around $385 and most double-storey jobs around $690. The two levers are size and height — and, more than people expect, the method the job actually needs.

Single storey vs double storey

The clearest split in house-washing prices is the second storey. A single-level home can be reached safely from the ground or off a short ladder with a telescopic lance, so it's faster and lower-risk — that's the $230–$645 band (typical $385). Add a second storey and you bring in height, more setup, sometimes a harness or a longer reach pole, and a lot more careful work around windows and eaves up high. That's why double-storey homes sit at $415–$1,000 (typical $690), with larger or more complex facades at the top of that range.

Footprint matters too. A compact character sandstone cottage and a sprawling four-bedroom home are both "single storey," but one has twice the wall area. A good operator prices off the actual surface, not a flat per-house figure, which is why two homes on the same street can quote differently.

Soft washing vs high pressure — and why it matters for your cladding

This is the part that catches people out. The right method depends on what your walls are made of, and using the wrong one is how a "cheap" wash turns into a repaint.

Soft washing uses low pressure plus a cleaning solution that kills mould, algae and lichen, then a gentle rinse. It's the correct method for render, Hardie/fibre-cement and painted weatherboard — surfaces that high pressure will damage by stripping paint, lifting render or forcing water in behind the cladding where it can't dry. On these homes, pressure is the enemy and chemistry does the work.

High pressure has its place — on hardy surfaces like raw brick, concrete and some masonry it can clean quickly. But a lot of Adelaide housing stock is rendered, painted brick, sandstone-fronted or clad, so for most full-house washes the bulk of the job should be a soft wash, with pressure used selectively. If an operator's plan is to blast the whole house at full pressure, that's a flag worth questioning before you book.

Mould, algae and winter shading — Adelaide's exterior wash drivers

Across Adelaide and especially the Adelaide Hills foothills, damp winter shading, eucalypt leaf litter and summer dust make mould, algae and grime the main reason houses need washing. The black and green streaking you see on render and gutters isn't just dirt sitting on the surface — it's living growth with roots in the coating.

That's why treatment beats brute force. A proper soft wash treats the growth at the source, so the wall doesn't just look clean for a fortnight before the streaks creep back. South-facing and shaded walls, and anything under tree cover, regrow fastest, so they're the parts that benefit most from a treatment rather than a quick rinse. Where mould is heavy across the whole exterior, you'll see it priced as its own line ($275–$830, typical $505 depending on size and severity, plus $46–$140 / typical $64 for a post-wash mould inhibitor treatment) rather than folded into the basic wash.

What's usually included

A standard house wash typically covers the walls, eaves and fascia, and the exterior of gutters. Confirm the edges of scope before you book: are window frames and glass included or just the walls? Are paths and the driveway separate (they usually are)? Is gutter interior cleaning part of it (almost always a different job)? None of this is a gotcha if it's spelled out — it only becomes one when it's assumed.

A worked Adelaide example

Picture a double-storey rendered home in Burnside with heavy mould down the shaded southern wall and the usual streaking on the upper eaves. A flat "house wash" number would undersell what this needs.

The job is a soft wash throughout — render rules out high pressure — with extra dwell time and treatment on the south wall's mould. Reaching the upper storey safely adds setup. The operator quotes one figure for the wash with the mould treatment built in, rather than a base price plus a vague "we'll see about the mould" on the day. The owner knows the number before anyone arrives, and the south wall stays clean for a season rather than a fortnight.

Before you paint, and how often to wash

If you're repainting, a wash almost always comes first — clean, mould-free walls are what let new paint actually bond, and most professional painting jobs require it. Booking the wash as part of the prep can work out cheaper than a separate call-out.

For upkeep, most Adelaide homes do well with a wash every one to two years, sooner on shaded or tree-lined blocks. A regular soft wash isn't just cosmetic — by keeping mould and algae off render and paint, it genuinely extends how long those finishes last, which makes it one of the cheaper forms of home maintenance going.

Frequently asked questions

How much does it cost to wash a house exterior in Adelaide?

A full exterior house wash in Adelaide typically costs $230 to $645 (typical $385) for a single-storey home and $415 to $1,000 (typical $690) for a double-storey home. The second storey adds height, setup and careful work up high, which is the main reason for the jump. Footprint matters too - a larger single-storey home has more wall area and prices higher than a compact one.

What is the difference between soft washing and high-pressure cleaning?

Soft washing uses low pressure plus a cleaning solution that kills mould, algae and lichen, then a gentle rinse. It is the correct method for render, Hardie or fibre-cement and painted weatherboard. High pressure can damage those surfaces by stripping paint, lifting render or forcing water behind the cladding. High pressure is fine on hardy surfaces like raw brick and concrete, but most full-house washes should be mainly a soft wash.

Will pressure washing damage my render or weatherboard?

It can, if the wrong method is used. High pressure on render, fibre-cement or painted weatherboard can strip paint, lift the render and drive water in behind the cladding where it cannot dry. These surfaces should be soft washed at low pressure with a cleaning solution doing the work. If an operator plans to blast the whole house at full pressure, question it before booking.

Why does my Adelaide house get mould and black streaks?

Adelaide winter dampness, shaded southern walls and tree cover in foothills suburbs make mould and algae a common reason houses need washing. The black and green streaking on render and gutters is living growth with roots in the coating, not just surface dirt. South-facing, shaded and tree-covered walls regrow fastest. A proper soft wash treats the growth at the source so it does not creep back within a fortnight.

How often should I wash my house in Adelaide?

Most Adelaide homes do well with an exterior wash every one to two years, sooner on shaded or tree-lined blocks. A regular soft wash is not just cosmetic - by keeping mould and algae off render and paint, it genuinely extends how long those finishes last, which makes it one of the cheaper forms of home maintenance.