Wellington’s northern suburbs are known for their family-friendly communities, elevated views, and leafy green streets. But if you live in Johnsonville, Newlands, Khandallah, Paparangi, or Ngaio, you already know how quickly your home’s exterior can start to look tired — covered in grime, mould, or streaks from Wellington’s famous weather.
In these suburbs, wind, bush, moisture, and salt air work together to wear down your property’s exterior. That’s why regular house washing isn’t just a cosmetic upgrade — it’s vital maintenance.
At Metro Water Blasting, we offer professional house washing services across Wellington’s northern suburbs, using soft wash techniques tailored to your home’s materials, slope, and environment. Whether you’re prepping your home for sale, maintaining it for the long haul, or just want it to look its best — we’re your go-to local team.
👉 Learn more about our services: House Wash Wellington
Why Northern Wellington Homes Need Regular House Washing
While northern Wellington gets slightly less salt spray than coastal areas, the region is still hit with:
- High wind exposure
- Moisture-retaining vegetation
- Shaded homes near bush or gullies
- Tree pollen and leaf debris
- Urban air pollutants from road traffic
These conditions lead to:
- Black mould and green algae forming on weatherboards
- Staining under eaves, around windows, and along baseboards
- Spiderwebs, dust, and dirt stuck to cladding and trims
- Paint deterioration and rot if left untreated
Homes in Ngaio and Khandallah, surrounded by native bush, often face faster bio-growth buildup. Properties in Newlands and Paparangi, while newer, suffer from wind-driven dust and airborne grime from nearby arterial roads.
Suburb-by-Suburb Breakdown: Common Exterior Issues
✅ Johnsonville
Exposed to wind and street-level splashback, homes here often need grime and mildew removal around the base of the home and under eaves.
✅ Newlands
Moderate sun, heavy winds, and surrounding bush mean pollen, algae, and spiderwebs collect fast on trims and siding.
✅ Khandallah
Heritage homes with complex architecture require gentle, effective cleaning of weatherboards and trims to avoid damage.
✅ Paparangi & Grenada Village
New builds with smooth finishes and modern materials suffer from traffic grime and oxidation streaks — easily cleaned with soft washing.
✅ Ngaio
Shaded hillsides and thick trees mean serious mould and algae growth. Soft washing safely removes these without damaging paintwork.
What We Clean – Full Exterior House Washing Package
When you book with Metro Water Blasting, your house wash includes:
- Soft wash of cladding and walls (timber, brick, concrete, or plaster)
- Soffits, fascia, downpipes, and gutter exteriors
- Exterior doors, frames, and windowsills
- Foundation walls and baseboards, where grime collects most
👉 See more: House Washing Wellington
Why We Use Soft Washing – Not High Pressure
We use a biodegradable detergent + low-pressure rinse approach that:
- Doesn’t strip paint or damage timber
- Kills mould and mildew at the root
- Is safe around gardens and pets
- Leaves your home cleaner for longer
This is ideal for all cladding types — especially for heritage properties in Khandallah or bush-covered homes in Ngaio.
Before & After Results
We cleaned a 1960s weatherboard home in Ngaio that hadn’t been washed in over 5 years. After our soft wash treatment, the mould, dirt, and discolouration were completely gone — and the paint looked nearly new.
A two-storey brick home in Paparangi had black grime on every wall and green growth on the shaded side. We completed the job in one morning, restoring its original colour and helping the owners prep it for sale.
👉 Related blog: Spring Home Maintenance in Wellington
👉 Also see: Roof Moss Treatment Guide
Add-On Services for a Total Refresh
Northern Wellington homeowners often bundle their house wash with:
- Gutter Cleaning – Prevent overflow and protect paintwork
- Roof Cleaning – Kill moss before it spreads to walls
- Driveway & Path Cleaning – Eliminate slippery moss from concrete
- Fence or Deck Cleaning – Bring timber features back to life
FAQs About House Washing in Northern Wellington
Q: Will your wash damage my paint?
No. We use soft washing — a low-pressure method that lifts grime safely without damaging paint or weatherboards.
Q: Can I combine services?
Yes. Most customers book a house wash plus gutter or driveway cleaning for a full exterior refresh.
Q: Do you clean multi-level homes?
Yes. Our team is trained to work safely on hillsides and multi-storey homes — very common in Johnsonville and Khandallah.
Book Your House Wash in Northern Wellington Today
If you live in Johnsonville, Newlands, Khandallah, Paparangi, or Ngaio, we’re your local experts for fast, safe, and effective house washing.
📍 Based in Wellington
📞 Call 0800 997 997 – Phones answered 24/7
📅 Book now: House Washing Wellington