Thinking about leveling out your backyard, creating a new parking pad, or securing a sloping section? A retaining wall is often the perfect solution. But before you get the machinery on-site, there is one crucial question every homeowner asks: Do I need a council building consent?
The short answer is: It depends on the height of the wall and what is sitting on top of it.
Under the New Zealand Building Act, many retaining walls can actually be built without a building consent. However, getting it wrong can lead to costly council fines or issues when you eventually try to sell your property.
Here is a simple guide to the rules for retaining walls in Napier, Hastings, and the wider Hawke’s Bay region.
The 1.5-Metre Rule (When You DON’T Need Consent)
In most cases, you do not need a building consent if your retaining wall meets all of the following criteria:
- Height: The wall retains less than 1.5 metres of ground/soil.
- No Surcharge: The ground above the wall is flat and doesn’t carry any extra weight (known as a “surcharge”).
- Distance: The wall is not supporting any nearby structures like a driveway, a house foundation, or a boundary fence line.
If your project fits this description, you are generally good to go. However, the wall must still comply with the New Zealand Building Code and be structurally sound.
When a Building Consent IS Legally Required
You will definitely need to apply for a building consent from the Napier City Council or Hastings District Council if:
- The wall is over 1.5 metres high: Measured from the bottom of the foundation to the top of the wall.
- There is a surcharge load: This means there is a slope, a driveway, a parking space, a building, or a heavy fence sitting on the ground directly above or near the wall. Even a short 1-metre wall needs a consent if a car is going to park right behind it.
- It’s near a boundary: If the failure of the wall could damage a neighbor’s property or public land.
Don’t Forget Resource Consent!
Even if your wall doesn’t need a building consent based on its height, it might still need a resource consent. This happens if the wall breaches local district plan rules, such as:
- Sitting too close to a boundary line (yard setbacks).
- Exceeding maximum site coverage or height-in-relation-to-boundary rules.
- Earthworks that exceed local volume limits for your zone.
How G-Force Contracting Makes It Easy
Navigating council rules can feel like a headache, but you don’t have to figure it out alone.
When we take on a retaining wall project, we don’t just turn up with the diggers. We help you assess your site, determine exactly what consents are required, and get the job done right.
We are completely flexible with how your project is managed:
- Working with your builder: If you already have a builder lined up for your project, we will work seamlessly alongside them to handle all the precision earthworks, tight-access drilling, and site prep.
- Using our network: If you don’t have a builder yet, we can connect you with our own trusted network of local Hawke’s Bay builders and structural specialists to handle the entire build from start to finish.
We use specialist equipment like conveyor systems to handle tricky, steep slopes and tight-access residential sites cleanly and efficiently, ensuring your property remains protected and your wall handles the unique soil conditions of the Hawke’s Bay.
Planning a project? Give us a call on 027 252 0049 or send us a message through our website. Let’s look at your section and figure out the smartest, most cost-effective way to get your retaining wall built right.