Exterior House Painting NZ 2026 — Costs and How to Prep Properly

Introduction

Exterior house painting is one of the most important maintenance jobs on a New Zealand home. The country's unique combination of high UV exposure, heavy rainfall, and strong winds means that exterior paint has a tough job to do. If you don't repaint your house regularly, the paint will deteriorate, leaving the underlying surface vulnerable to damage. In this guide, we'll cover how often you should repaint your house, how to prepare the surface, what type of paint to use, and what it will cost. Whether you're a homeowner looking to DIY or a tradesperson seeking to provide the best service to your clients, this article will provide you with the information you need to get the job done right.

How Often Does Exterior Paint Last in NZ?

The lifespan of exterior paint in New Zealand varies depending on the region. In coastal areas like Northland and Auckland, the high salt content in the air and intense sunlight mean that paint may only last 7-10 years. In central New Zealand, paint can last 10-15 years, while in the South Island, where the climate is cooler and drier, paint can last 12-18 years. However, these are general guidelines, and the actual lifespan of your paint will depend on a range of factors, including the quality of the paint, the surface it's applied to, and how well it's maintained.

Signs that it's time to repaint your house include peeling, chalking, cracking, bare timber showing, and mould that won't wash off. If you notice any of these signs, it's time to start thinking about repainting. Don't wait too long, as the longer you leave it, the more damage can occur, and the more expensive the repair will be.

Surface Types and Considerations

Different surfaces require different types of paint and preparation. Here are some common surface types and considerations:

• Weatherboard (timber): This is the most prep-intensive surface, as it requires sanding and priming bare patches. A flexible paint like Resene Lumbersider or Dulux Weathershield is recommended.
• Fibrous cement (Hardiflex): If your house has fibrous cement cladding, it's essential to check if it contains asbestos before sanding. If it was installed before 1990, it's likely to contain asbestos. Use a paint like Resene Lumbersider or Dulux 10yr exterior, and always follow safety guidelines when working with asbestos.
• Plaster/render (solid plaster, roughcast, monolithic): This surface requires a breathable paint to prevent moisture from becoming trapped. Resene Roof & Spouting or a specialist plaster paint is recommended. If you have a monolithic plaster home, it's essential to check for leaky home symptoms before painting.
• Colosteel/metal surfaces: These surfaces require a rust-inhibiting primer and a direct-to-metal top coat.

Prep — The Most Important Step

Preparation is the most critical step in exterior painting. Here are the steps you need to follow:

• Water blasting: Hire a water blaster for $80-$150 per day or hire a contractor for $300-$800 to blast your entire house. This will remove dirt, grime, and old paint.
• Allow to dry: Allow 2-3 fine days for the surface to dry before painting.
• Scrape and sand: Scrape off peeling paint and sand the surface to create a smooth finish.
• Fill cracks: Fill cracks with an exterior-grade filler like Resene Filler or Selleys No More Gaps exterior.
• Spot prime: Spot prime bare timber and repairs to ensure a strong bond between the paint and the surface.
• Mask up: Mask up glass and trim where you're changing the colour to prevent paint from getting on these surfaces.

Using a job management tool like Fergus or Tradify can help you organise your prep work and ensure that you don't miss any critical steps.

Paint Selection

When it comes to exterior paint, there are two main types: water-based and oil-based. In New Zealand, most painters now use water-based exterior paint, as it dries faster, has better flexibility, and lower VOCs (volatile organic compounds). When choosing a paint, consider the sheen level: low-sheen on walls and semi-gloss on trim. Resene, Dulux, and Wattyl are the three main New Zealand brands with full exterior systems.

Number of Coats

One coat of paint is rarely enough on exterior surfaces. Two coats are standard, and three coats may be required on previously bare or heavily sanded surfaces.

DIY vs Hire a Painter

A full exterior repaint of a 3-bedroom house is a 2-3 person week job, including heights and access (scaffolding or ladder). While it's possible to DIY, it's essential to realistically assess your abilities. Most homeowners can paint ground-level and garage areas, but two-storey houses require scaffolding (hire $400-$1,200 for a week), which can be a significant safety risk. Professional painters have the right equipment and do prep work properly, ensuring a high-quality finish.

Exterior Painting Costs NZ

The cost of exterior painting in New Zealand varies depending on the surface type, size of the house, and location. Here are some estimated costs:

• Professional painter — weatherboard 3-bed house: $6,000-$15,000 (includes prep, materials, 2 coats walls + trim)
• Professional painter — plaster house (less prep): $5,000-$12,000
• Per m² rate: $20-$45/m² of wall area (surfaces vary significantly)
• Scaffolding if required: $800-$2,500 extra
• Materials only (DIY): $1,500-$4,000 for a 3-bed house

Using an accounting tool like Xero can help you manage your finances and track your expenses.

How to Get the Best Painter Quote

To get the best painter quote, ensure that you provide a written scope of work, including:

• Prep detail
• Number of coats
• Paint brand and system specified
• What's included (spouting? eaves? deck?)

Get at least three quotes from different painters and compare them to find the best value for your money.

FAQ

Here are some frequently asked questions about exterior painting in New Zealand:

1. How often should you paint the exterior of a house in NZ?: The frequency of exterior painting depends on the region, surface type, and climate. As a general rule, paint every 7-18 years, depending on the factors mentioned earlier.
2. How do I get rid of mould before painting?: Use a solution of water and bleach to kill mould, then scrub the area with a brush and rinse with water. Allow the area to dry before painting.
3. Can I paint fibrous cement cladding myself?: Yes, but ensure that you follow safety guidelines when working with fibrous cement, and always check for asbestos before sanding.
4. What's the best exterior paint for NZ conditions?: Water-based exterior paint is recommended, as it dries faster, has better flexibility, and lower VOCs. Choose a paint from a reputable brand like Resene, Dulux, or Wattyl.
5. Do painters supply the paint or do I?: It depends on the agreement you have with your painter. Some painters may supply the paint, while others may require you to purchase it separately.

Conclusion

Exterior painting is a critical maintenance job that requires careful preparation, the right materials, and a thorough understanding of the surface type and climate. By following the guidelines outlined in this article, you can ensure a high-quality finish that will protect your home for years to come. If you're looking for a professional painter to do the job, visit tradietools.nz/trades/painters/ to find exterior painters near you. Use our painting cost calculator to estimate the cost of your project and get started on protecting your home today.