Professional Exterior Cleaning for Commercial Properties

First impressions start outside. KM Dass delivers commercial exterior cleaning from building washes and water blasting to carpark sweeping and exterior window cleaning keeping your property looking sharp and well-maintained.

About This Service

Exterior Cleaning That Reflects the Standard of Your Business

KM Dass provides comprehensive exterior cleaning services for commercial properties across New Zealand. Whether your site needs a full building wash, a carpark clean-up, or ongoing window maintenance, we bring the same professional standard to your exterior. Our teams are experienced working at height and with high-pressure equipment, operating safely around live commercial environments.

What We Cover

Our Exterior Cleaning Services

Exterior Building Washing

Soft wash or pressure wash of cladding, panels, and facades to remove dirt, algae, and weathering stains.

Exterior Window & Glass Cleaning

Commercial-grade cleaning of all external glazing, frames, and glass panels for a streak-free, professional finish.

Carpark Cleaning & Sweeping

Mechanical sweeping and blowing of carparks, driveways, and loading zones to remove debris and surface build-up.

Water Blasting

High-pressure water blasting of concrete paths, driveways, walls, and outdoor areas to lift ingrained grime and staining.

Bin Enclosures & Service Areas

Cleaning and sanitising of bin bays, loading docks, and service areas often overlooked in standard maintenance.

Post-Construction & Periodic Deep Clean

Full exterior clean-down after building work, renovation, or seasonal build-up — restoring your property’s appearance.

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Why Choose KM Dass

Verified Standards. Proven Performance.

KM Dass holds independent certifications across health and safety, environmental management, quality systems, and security vetting. Our credentials aren’t just badges — they back up every site we clean.

Ownership & Accountability

Proudly Kiwi. Fully Accountable.

100% New Zealand owned and operated with one direct line of accountability from management to cleaner. When you call, you speak with someone who knows your site. No call centres. No runaround.

Community First

We Are Local, Near You.

Our cleaners are local people from your region who take pride in looking after their own community. Real people. Real relationships. Real results. That’s why our clients stay with us.

Management & Oversight

We Don't Just Clean. We Manage.

Digital time tracking on every shift. Monthly physical site inspections. Performance reports you can actually read. We don’t wait for complaints we catch issues before you see them.

Where We Work

Local Teams. Nationwide Coverage.

From Northland to Wellington and into the South Island, KM Dass operates across New Zealand’s regions with local cleaners who know your community. We’re not a national brand dropping strangers into your site we’re your neighbours, showing up every day.

Head office in Hamilton, with teams operations in Auckland, Tauranga, Wellington, New Plymouth, Whangarei, Palmerston North, Napier, Hastings, Nelson and Blenheim.

Frequently asked questions

We’re here to help with all your questions and answers in one place. Can’t find what you’re looking for? Reach out to our support team directly.

Can you work around our business hours?

Yes. We schedule exterior cleaning jobs outside your trading hours wherever possible, early mornings, evenings, or weekends. We coordinate with your team to find times that cause the least disruption to your staff, customers, and operations.

Do you service properties outside of main centres?

Yes. One of KM Dass’s key strengths is our regional coverage. We service commercial properties across 10 regions including Waikato, Auckland, Bay of Plenty, Wellington, Taranaki, Hawke’s Bay, and more. If you’re outside a main centre, we’re likely still in your area.

How often should exterior cleaning be done?

It depends on your property’s location and exposure. Buildings near roads, coastal areas, or high-traffic environments typically need more frequent attention. Most commercial clients schedule a full exterior wash once or twice a year with carpark sweeping and window cleaning done more regularly. We’ll recommend a programme based on your site.

Get In Touch

Ready for a Cleaner, Healthier Workplace?

Tell us about your site and we’ll put together a cleaning plan built around your needs. No lock-in contracts, no one-size-fits-all packages. Just consistent, professional cleaning from a team that shows up.