Platypus Renewal Project

With the industrial legacy of a former Gasworks, Platypus contained underground fill and bedrock materials beneath contaminated with substances associated with the production of coal gas, including tar and tarry wastes. Remediation of the site was the first step towards the transformation of Platypus into a new public waterfront destination.


Initial remediation involved above-ground preparations including demolition of some buildings, removal of hazardous materials, repairs to the seawall and wharf, and upgrading of underground services


The next stage of remediation involved the construction of an odour control enclosure, and installation of an emission control system and water treatment plant. Around 3,000 tonnes of tar-containing materials were excavated and removed by barge for off-site disposal.

At six storeys high, the odour control enclosure was the largest structure of its type ever constructed. 27,000 tonnes of material remained for on-site treatment and stabilisation. This material was then used to backfill the excavated area and to create a mound capped with clean soil, forming the base for the landscaped park at the northern end of Sub Base Platypus.



The Australian Government has pledged a $20 million investment towards opening Platypus as a public park, supplemented by a further $3.8 million of funding from the Harbour Trust, in line with the commitment to make Sydney an even more vibrant, liveable and accessible city.

Extensive consultation and strong community support is the keystone of Platypus revitalisation planning. This process led to the Harbour Trust’s adoption of a Management Plan in 2016 that sets out a clear vision for the site’s renewal as a public park with buildings adapted for a mix of cultural, community and commercial uses. Income from reactivation of the site will contribute to maintaining Sub Base Platypus and other Harbour Trust parklands for public enjoyment.

The Platypus Management Plan highlights 5 revitalisation priorities:
1. Reopen
2. Reconnect
3. Respect
4. Reactivate
5. Reinvest

The Platypus Renewal Project will see significant outcomes from the Management Plan vision realised, with funds going towards the creation of a new public domain and pedestrian access improvements.

The Platypus Renewal Project will focus on:

New open space – creating new public open space on the foreshore and facing High Street.

Access improvements – a new over-water pedestrian link to North Sydney Wharf; new lift and stairs between levels; and limited new car parking accessed from High Street.

Building renovation – base refurbishment of selected buildings to facilitate their future re-use.

Renewal Project Documents

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