Build a retaining wall
If you are building a retaining wall, find out the key facts about the property and if you require planning approval.
A retaining wall is a structure erected to support an excavated or filled embankment.
A PD Online property enquiry can help you determine if the proposal requires Council approval. You can also phone 07 3403 8888 to speak to a town planner.
No development application required
In all zones, you will not need a development application, if the proposed retaining wall is:
- less than one metre high
- set back from any boundary
- stepped or terraced (so landscaping can soften visual impact).
If your proposed retaining wall does not meet these requirements, you will need a development application.
Other circumstances when a development application may be required
Contact Council for specific advice if your proposed retaining wall is:
- located on a site covered by the:
- located on a site subject to the:
- associated with the development of a dwelling house on a small lot
- associated with the subdivision of a site, particularly a site with a slope
- associated with the filling or excavation exceeding thresholds identified in the filling and excavation code.
A retaining wall is a 'class 10b' (non-habitable) structure under the Building Code of Australia (forming Volumes one and two of the National Construction Code).
Queensland building regulations advise you will not need building approval for a retaining wall if:
- there is no 'surcharge loading' over the 'zone of influence' for the wall (refer to definitions in the Building Regulation 2006 (Schedule 1 Section 3))
- the total height of the wall and of the fill or cut retained by the wall is no more than one metre above the wall's natural ground surface
- the wall is no closer than 1.5 metres to a building or another retaining wall
- it does not form part of the fencing for a pool.
If your project does not meet all requirements, you must prepare a building application for building certifier approval. You must give the certifier scaled and detailed plans prepared by a draftsperson or architect.
The Queensland Development Code recommends you construct retaining walls up to one metre, requiring fill or excavation, in accordance with an accepted industry standard publication, depending on the materials used to construct it (e.g. timber, concrete masonry).
The code also requires minimum clearances from roads and side and rear boundaries. Your certifier can seek an alternative setback from the front, side or rear boundary by applying for a siting variation.