Treeby is the City of Cockburn’s newest suburb. It is located on the east side of the Kwinana Freeway, close to Cockburn Central.

About Treeby

Treeby is primarily a rural area, originally part of the Banjup locality. In recent years, an area previously mined for sand was developed into a new residential estate called Calleya.

Proposals being advertised

Where planning proposals in this area are still being advertised, you can view them on our Comment on Cockburn webpage.

Treeby District Structure Plan

The Treeby District Structure Plan is a guiding document Council will use to set out expectations to developers within the area which they should use when preparing applications for rezonings and/or structure plans. It also provides the Treeby community (existing and future) with an indication of how the area is intended to develop.

It indicates:

  • Broad land-use arrangement, buffers and any relevant targets (e.g. density targets)
  • Coordination of major infrastructure (including schools, district water management, district movement networks, regional & district level open space/conservation areas, district recreation facilities)
  • Broad funding arrangements for improvements, potentially including the principles of a Development Contribution Plan.

Calleya Estate

Calleya Estate covers the Stockland-owned section of Treeby. The Calleya Estate Structure Plan outlines the proposed framework and form of residential development, community and educational facilities, pedestrian connections and land uses in this area.  

More information and contact

Please contact the Strategic Planning for more information on Treeby on 08 9411 3444.



City of Cockburn
Whadjuk Boodja
9 Coleville Crescent,
Spearwood 6163

PO Box 1215, Bibra Lake DC,
Western Australia, 6965

Office opening hours:
8.30am to 4.30pm
Monday to Friday (excluding public holidays)

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Cockburn Nyungar moort Beeliar boodja-k kaadadjiny. Koora, yeyi, benang baalap nidja boodja-k kaaradjiny.
Ngalak kaditj boodjar kep wer kaadidjiny kalyakool yoodaniny, wer koora wer yeyi ngalak Birdiya koota-djinanginy.

City of Cockburn acknowledges the Nyungar people of Beeliar boodja. Long ago, now and in the future they care for Country.
We acknowledge a continuing connection to land, waters and culture and pay our respects to the Elders, past and present.