Where a Septic Tank Can Go in Busselton

What septic tank position in Busselton actually involves

The same regulation says no one shall cause or permit the construction of the foundations of any building closer than 1.2 m to an existing septic tank, unless otherwise approved. It works both ways: a tank near a boundary limits what a neighbour can build, and a planned extension limits where a tank can go.

Distances near water

The State's Planning for Water Guidelines (December 2025) say an on-site wastewater system should not be located within 100 m of a waterway or significant wetland, measured outwards from the outer edge of riparian or wetland vegetation. The Guidelines call themselves guidance that should not be applied with stringent regulatory effect, so treat 100 m as what the City will weigh, not a line this site can draw on your lot.

Ask how the plan meets it

Ask how the approved plan meets the 1.2 m line, and what sits on the neighbouring side of the boundary. The choosing page covers what the State expects near sensitive water.

Ask the provider to mark the proposed tank position on the plan the City will see, so the distances can be read off it.

Where a Septic Tank Can Go in Busselton — common questions

How close to a boundary can a tank go?

Not closer than 1.2 m to the foundations of any building or the boundary of any lot, unless otherwise approved.

Does the rule limit building near an existing tank?

Yes. The regulations say no one shall build the foundations of any building closer than 1.2 m to an existing septic tank unless otherwise approved.

Is there a distance from a wetland?

The State's Guidelines say an on-site system should not be located within 100 m of a waterway or significant wetland, as guidance. Ask the City how it applies to your lot.