Exterior Cleaning
Exterior Cleaning near you
Exterior cleaning covers everything on the outside of a house that is not the roof: render and painted walls, brick and stone, eaves and soffits, fascias, garage doors, fences, balustrades, columns, and the general film of dust, pollen, cobweb and mildew that settles on a building over a year.
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The question nobody asks until a neighbour or a council officer raises it is where the water goes afterwards. EPA Victoria's guidance is the clearest Australian statement of the answer: stormwater is surface run-off from rain and storm events, and it travels through gutters and drains into our waterways. The things it names as pollutants that should be prevented from entering drains include chemicals such as pesticides, herbicides, fertilisers, oil, paint and heavy metals; shampoos and washing detergents; and sediment such as dust and dirt or soil from building sites.
The duty is not confined to businesses. EPA Victoria states that the general environmental duty applies to activities that may impact stormwater and the stormwater drainage system, and that everyone must eliminate or reduce risk of harm and prevent waste from entering stormwater drains so far as reasonably practicable. A householder washing a wall with detergent, with the runoff heading straight to a kerb inlet, is inside that duty. Other states have their own environment protection regimes, so check yours.
Where the wash water ends up
The single most useful thing to understand about outdoor cleaning in Australia is that the stormwater system and the sewer are not the same thing. EPA Victoria describes stormwater as surface run-off from rain and storm events that travels through gutters and drains into our waterways. The kerb inlet outside your house is not a treatment plant inlet; in most Australian suburbs it is a pipe to a creek.
That is why EPA Victoria's list of what should be kept out of drains includes shampoos and washing detergents alongside oil, paint and heavy metals, and sediment such as dust and dirt or soil from building sites. Detergent in a waterway is not a trivial thing, and neither is a slug of sediment from a render wash.
The duty that attaches is broad. EPA Victoria states that the general environmental duty applies to activities that may impact stormwater and the stormwater drainage system, and that everyone must eliminate or reduce risk of harm and prevent waste from entering stormwater drains so far as reasonably practicable. In practice the reasonably practicable steps are modest: choose the mildest effective product, direct runoff onto garden or lawn where it can soak away rather than to a kerb inlet, block or bund a drain inlet during the work where it is safe to do so, and collect and dispose of anything concentrated. A contractor who can describe their runoff plan without being prompted is a contractor who has thought about it.
What an exterior clean actually covers
- Render and painted walls, which are the largest area and the most sensitive to pressure.
- Face brick and stone, where the joints are as vulnerable as the units.
- Eaves and soffits, which on older houses may be asbestos cement and must not be pressure cleaned.
- Fascias, barge boards and downpipes, which show streaking more than any other element.
- Garage doors, security doors, balustrades and columns.
- Fencing, including colorbond, timber and cement-sheet fences, the last of which carries the same asbestos caution as eaves.
- External glass, screens and light fittings, which are usually handled with the window cleaning rather than the wall wash.
- Outdoor living areas, including alfresco ceilings and pergola structures, where cobweb and dust accumulate out of sight.
What each surface will and will not tolerate
- Painted render responds to detergent, dwell time and a soft wash; high pressure will strip both the paint and the render behind it.
- Unpainted render and texture coatings are porous and mark easily, so uneven cleaning shows permanently.
- Face brick tolerates more, but mortar joints do not, and blown joints become a repointing job.
- Sandstone and soft older bricks erode under pressure and should be treated as heritage materials.
- Colorbond and powder-coated aluminium clean well with detergent and a gentle rinse, and are damaged by abrasives and strong solvents.
- Timber cladding and decking furrs and splinters under pressure, and needs low pressure with a wide fan if any is used.
- Cement sheet eaves, cladding and fencing on a pre-1990 house must not be pressure cleaned at all, because high-pressure water on asbestos products is prohibited.
- Glass and screens are better handled by hand or with a pole system than as part of a wall wash.
How a soft wash on a house should run
- Identify the substrate and the age of the building first, and rule out any asbestos cement before anything is switched on.
- Plan where the runoff will go before starting, keeping it off the driveway and away from kerb inlets where practicable.
- Protect and cover what should not get wet: power points, light fittings, vents, air conditioning units, door seals and garden beds.
- Wet down garden beds and plants beforehand so detergent is diluted rather than concentrated on them.
- Apply a suitable detergent and give it dwell time, which is what does the work on mildew and film.
- Rinse from the bottom up and finish from the top down, which is the technique that avoids streaking on render.
- Keep pressure low and the fan wide throughout, since the aim is a soft wash rather than a blast.
- Check windows, seals and any penetration afterwards for water ingress, because that is where it shows up.
What goes wrong on house washes
- Streaking and tide marks on render where rinsing was done in the wrong order or the wall dried in patches.
- Paint or coating lifted by too much pressure, which turns a clean into a repaint.
- Water driven behind cladding, through weep holes or past window seals, which shows as interior damage days later.
- Blown mortar joints in brickwork and stonework.
- Plant damage from detergent runoff concentrated in a garden bed.
- Stained or etched paving below the walls, caused by products running down onto it.
- Electrical hazards where water reached outdoor power points, lights or a meter box.
- Fibre release from cement sheeting on a pre-1990 house, which is the failure that reaches beyond your own property.
What exterior cleaning is priced on
- Wall area and the number of storeys, which decide both time and access equipment.
- Substrate, since delicate surfaces mean lower pressure and more time rather than less.
- How much mildew, cobweb and film there is, and whether treatment with dwell time is required.
- Whether eaves, fascias, gutters faces, downpipes and fences are included or quoted separately.
- Access: narrow side passages, sloping blocks, garden beds against walls and neighbouring boundaries all slow the work.
- Whether runoff has to be contained or diverted, which is real time on a site that drains straight to a kerb inlet.
- Whether windows and screens are in scope, which is usually a separate service.
- The age of the building, because anything suggesting asbestos cement changes the method and may take parts of the job off the table.
Setting the scope, and how LokalMatch fits in
Agree before the work what is being cleaned, what pressure will be used, what happens to the runoff, and what will not come off. Oxidised paint, chalking render, permanent staining from bore water or rust, and weathering on a north-facing wall are not dirt. A quote that lists exclusions is a quote from somebody who has looked at the building.
Exterior work damages buildings in ways that only appear later: water driven in behind cladding, render lifted off a wall, mortar cut out of old brickwork, a coating stripped well past the point of touching up. The consumer guarantee on services is the lever when it happens — the job has to be done with acceptable care and skill, a minor failure has to be put right at no charge, and a major one lets you cancel for a refund or keep the work at a reduced price. Compensation for the damage is a separate claim, which is the argument for photographing every elevation before anyone starts.
LokalMatch only makes the introduction. You describe the building, its approximate age, the wall material, the number of storeys and what you want included, and businesses that cover your area contact you directly. Those businesses pay LokalMatch for the requests they receive. LokalMatch does no cleaning, quotes no prices and does not vet, rank or recommend any business, so asking how the runoff will be managed is still your step.
Exterior Cleaning: frequently asked questions
Does the detergent from washing my house really matter?
It goes somewhere, and in most Australian suburbs that somewhere is a creek. EPA Victoria describes stormwater as run-off that travels through gutters and drains into our waterways, and lists shampoos and washing detergents among the pollutants that should be prevented from entering drains, alongside sediment such as dust and dirt. It also states that the general environmental duty applies to activities that may impact stormwater, and that everyone must eliminate or reduce risk of harm and prevent waste from entering stormwater drains so far as reasonably practicable.
What can I do about runoff without making a project of it?
Small things, done deliberately. Choose the mildest product that works and use less of it. Direct runoff onto lawn or garden where it can soak away rather than letting it run down the driveway to a kerb inlet. Wet plants down first so anything that reaches them is diluted. Where a drain inlet is right at the work and it is safe to do so, block or bund it temporarily. Keep anything concentrated, such as leftover mixed product, out of the drain entirely.
Is soft washing better than pressure washing for house walls?
For render, paint and most cladding, yes. Soft washing relies on an appropriate detergent and dwell time to break down mildew and film, then a gentle rinse, which cleans the surface without driving water into the building or stripping the coating. High pressure on a wall removes grime and coating at the same rate and pushes water behind cladding and past seals. Pressure has its place on hard horizontal surfaces, and much less of one on a wall.
My house is from the 1960s and has cement sheet eaves. Can they be cleaned?
Not with high pressure. SafeWork NSW says never use high-pressure water or compressed air on asbestos products, and Australian guidance is that many houses built before 1990 contain asbestos cement materials especially in eaves, wall cladding, wet-area ceilings and fences. Tell the operator the age of the house before they quote. If the sheeting is damaged or deteriorating, that is a matter for a licensed asbestos removalist rather than a cleaner.
How often should the outside of a house be washed?
It depends on aspect and environment far more than on the calendar. South-facing and shaded walls grow mildew; coastal homes collect salt; houses on unsealed roads or near building sites collect dust; homes under trees collect sap and cobweb. Most houses look after themselves for a year or two and then benefit from a wash. The practical signal is when the film is visible from the footpath rather than only up close.
Will washing remove the chalky feel from my painted render?
No, and that is worth knowing before you book. Chalking is the paint film breaking down at the surface under UV, which in Australia happens faster than in most climates. Washing removes the loose chalk and the wall will look better for it, but the underlying coating is at the end of its life and the chalking returns. If the wall is chalking widely, you are looking at a repaint rather than a clean, and a wash is the preparation for it rather than a substitute.
Sources
Written by the LokalMatch editorial team. Last reviewed 22 September 2026. How we write and check our guides
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What affects the cost of exterior cleaning
Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:
- Size of the home and number of bathrooms
- Type of clean: regular, deep, move-in or move-out
- Current condition and how long since the last clean
- How often you book
- Extras like inside the oven, fridge, cabinets or windows
- Pets, stairs and access
How to compare exterior cleaners before you hire
- Ask exactly what's included in a standard clean, a deep clean and a move-out clean, since each company defines them differently.
- Check whether the company carries liability insurance and whether cleaners are employees or contractors.
- Ask whether they bring their own supplies and equipment, and whether they can use products you prefer.
- For recurring service, ask whether the same cleaner or team will usually come.
- For specialty work like carpet, upholstery or pressure washing, choose someone with the right equipment for that job.
Questions to ask exterior cleaners before you hire
- What exactly is included in the clean you're quoting?
- Do you bring your own supplies and equipment?
- Are you insured if something is damaged or someone is hurt?
- Will the same person or team come each time?
- How do you handle keys, alarm codes and access to my home?
- What happens if I'm not happy with part of the clean?
Exterior cleaning permits and local rules
Some exterior cleaning work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.
Permits and licensingGuides about exterior cleaning
- ✦
House Cleaning guide
House cleaning is one of the few home services in Australia that nobody needs a licence to perform. There is no register of cleaners, no occupational licence and no qualification you can ask to see.
Read guide - ✦
Recurring Cleaning guide
Two very different services get booked with the same phone call in Australia: the standing weekly or fortnightly clean, and the end-of-lease clean that has to satisfy a property manager against a condition report.
Read guide - ✦
Deep Cleaning guide
A deep clean is the visit that reaches everything a standing round never touches: inside the oven and the rangehood, behind and under appliances, the tracks of sliding doors and flyscreens, skirtings, door frames, light…
Read guide
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