Residential · New Zealand
Most homes in New Zealand need a professional wash every one to two years. Mould, algae, lichen, and environmental grime build up gradually on exterior surfaces — so gradually that it is easy not to notice until the house looks significantly older and more weathered than it actually is. Left untreated, biological growth holds moisture against cladding, paintwork, and timber, accelerating deterioration and creating maintenance costs that a regular house wash would have prevented. KMG provides professional house washing services across New Zealand, with experienced and friendly crews who take care of your property as if it were their own.
A KMG house wash is a thorough, systematic clean of your home's exterior surfaces using the right combination of soft washing and chemical treatment for your cladding type. We clean:
Whether your home has painted weatherboard, fibre cement, brick, plaster, or modern cladding, we select the appropriate method and chemical mix to remove mould, algae, lichen, and grime without damaging the surface or finish.
Often overlooked but among the first surfaces to show biological growth, rooflines and soffits are included in a full house wash as standard.
The outside faces of spouting and downpipes are washed down with the rest of the exterior. Clearing debris out of the gutters is our gutter cleaning service, and both are easily done in the same visit.
Frames, sills, tracks, and exterior joinery collect grime, salt, and cobwebs, and they are washed as part of the house wash. Cleaning the glass itself to a brush and blade finish is our window cleaning service.
Doors, porch ceilings, veranda linings, and entryways are washed with the same soft wash approach, so the parts of the house you walk past every day match the rest of it.
South-facing walls, shaded corners, and anywhere under trees hold moisture longest and grow the heaviest mould and lichen. These areas get the attention and the dwell time they need rather than a single quick pass.
A house wash involves chemical treatments that, if not handled correctly, can affect plants, lawns, and anything else around the base of your home. KMG crews take specific precautions before any chemical is applied. We pre-water all garden beds, lawns, and planting around the house to dilute any overspray that reaches the ground. Sensitive plants are covered where required. Chemical treatments are selected to be effective on the surfaces being cleaned while minimising impact on surrounding vegetation.
If you have pets, let us know when you book. We will advise on how long to keep them off treated surfaces and away from the work area during the clean.
Many homeowners get the best result by combining a full house wash with a water blast of hard surfaces in the same visit. The water blasting takes care of driveways, paths, and decks while the house wash addresses walls, cladding, rooflines, and fascia. Having both done at once is more cost-effective than booking separately and leaves the whole property looking consistently well maintained.
Learn more about our Residential Water Blasting service.
KMG works across commercial buildings and residential homes, which means the professionalism, equipment quality, and attention to detail you get on a residential job is the same as what we bring to a large commercial contract. Our crews are directly employed, trained to our standards, and take genuine pride in the work. We turn up when we say we will, we look after your property, and we leave the site tidy when we are done.
KMG holds ISO 45001:2018 certification for occupational health and safety, a standard that many exterior cleaning companies in New Zealand cannot demonstrate. We are Site Wise Gold certified, the highest certification level available through Site Safe, and pre-qualified through both Impac Prequal and CM3. For Facility Managers who manage contractor approval processes, KMG arrives already vetted. No chasing documents. No compliance gaps.
"Auckland Museum is thrilled and said it was the best job in years. A big thanks to you and the team. It's awesome that we have such an amazing partnership with you, one of high standards and trust. You are very appreciated."
"It's been a few months since we kicked off the building cleans with KMG and I wanted to take a moment to acknowledge the outstanding work you've delivered. The results have been stellar."
"This round of window cleaning has yielded the most positive feedback from residents to date. The team gave great service, were super friendly and went the extra mile. Communication has been outstanding. Their work ethic is excellent and a thorough job is always done without exception."
KMG pre-waters all garden beds, lawns, and planting around the house before applying any chemical treatments. This dilutes overspray at ground level and significantly reduces any impact on surrounding vegetation. In the vast majority of jobs there is no visible effect on plants or lawn. If you have particularly sensitive plants, let us know when you book and we will take additional precautions.
Yes, once treated surfaces have dried. We recommend keeping pets off treated surfaces and away from the work area during the wash and for a short period afterward while surfaces dry. Let us know when booking if you have pets and we will give you specific guidance based on the products being used.
Not usually. Most residential house washes are completed without the homeowner needing to be present. We do ask that garden taps are accessible for water connection and that pets are secured during the wash. Your KMG crew will let you know if there is anything specific required for your job when they confirm the booking.
Most standard residential house washes take between two and four hours depending on the size of the home, the level of soiling, and whether additional surfaces such as decks, paths, and fences are included. Your crew will give you a time estimate when they arrive.
A professional house wash removes the vast majority of mould, algae, lichen, and biological growth from exterior surfaces. In some cases where growth has been present for a long time and has penetrated the surface, some staining may remain after the wash. Your KMG crew will let you know what to expect before work begins.
Soft washing uses low pressure combined with specialist cleaning solutions to safely remove mould, algae, and grime from exterior surfaces without the risk of damage that high-pressure water blasting can cause on some cladding types. KMG selects the appropriate method for your home's exterior based on the cladding material, condition, and level of soiling.
Getting a quote is straightforward. Contact our team with your address and a brief description of your home and we will provide a clear, no-obligation price. Most residential house washes are completed in a single visit with no need for you to be home.