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1. Check if you need a consent to build a retaining wall

Tirohia mēnā me tono whakaaetanga rānei koe mō te whakatū pātū pupuri

​Have your plan ready

Before checking whether you need a consent for your retaining wall you need to know:

  • dimensions of the project (height, total area)
  • location on property where the project will go
  • size of the property in square metres
  • total pre-existing building coverage on property
  • total pre-existing hard surfaces on property.

There will be an explanation on how to calculate these factors in the online consent tool.

Our tip

If your retaining wall is close to a boundary, and you have the written approval from your neighbours, you can apply for a Deemed Permitted Boundary Activity.
 
This application replaces the need to apply for a resource consent.
 
You will still need to apply for a building consent, if required.

​How to check if you need a consent to add a retaining wall

 Online

​Our online tool helps you check if you need a building or resource consent for your retaining wall.

This tool doesn’t apply to properties with unstable soil conditions.  It also only covers residential zoned properties. Rural, non-residential retaining walls of up to 3m could be allowed.

Have your plans ready before you start.

It should take you about 10 minutes to complete.

Check now

 By phone

​Contact us on 09 301 0101.

 In person

​Visit your nearest service centre.

You should know

If there is a fall of a metre or more from the retaining wall, you may be required to include a safety barrier (see Building Code clause F4 - Safety from Falling).  Factors to consider include the purpose of the wall, how accessible it is, and whether young children will be around.

Your building work must:
  • comply with the Building Code, even if no building consent is needed
  • not damage public service drains if its foundations are close to the pipes.