Sub Base Platypus Renewal Project


Extensive consultation and strong community support is the keystone of the Sub Base Platypus Renewal Project. This process led to the Harbour Trust adopting a Management Plan (See: Planning framework) 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 first stage of the project – an urban parkland featuring a scenic over-water walkway,  BBQ area and pocket playground – has been completed, with the public granted access to these amenities in May 2018. The Australian Government and the Harbour Trust have jointly contributed $23.8 million towards the project.


The latest stage of construction works at Sub Base Platypus commenced on Wednesday, 19 September 2018. These works include the refurbishment of Buildings 2 (Submarine School) and 10 (Fleet Workshops) as well as rejuvenation of public spaces.

Building refurbishments include new roofing, additional glazing and the creation of mezzanines to accommodate new tenant needs.

Throughout the building works, the Harbour Trust will ensure the integrity of the site’s history is properly represented. Interpretation will reflect the site’s layered history including its enduring Indigenous connection, use as a gas works factory and its strong history as the naval base, HMAS Platypus.

Update (12/04/2019): Commencing Friday, 12 April 2019, the clifftop walkway will be subject to works for a period of approximately three weeks. In addition, there will be demolition and landscaping works to the Gateway plaza from Monday, 15 April. In late April 2019, refurbishment works to the gatehouse will commence. Note: All works will take place between 7am and 5pm on weekdays and between 8am and 1pm on Saturday.  Noise and traffic will be closely managed to minimise any potential disturbance to residents. These works are expected to be completed by September/October 2019. 

Emergency Contact:  In the event of an emergency, contact our Sub Base Platypus Ranger on 0437 049 296 or emergency on 000. Note: the ranger is on site between 7am and 3pm daily.


The remediation of contamination was a critical first step in the Harbour Trust’s transformation of the site into a new public urban park.

Remediation 2010-2016

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.

Ongoing Long-term Management

Remediation has been completed, and an Environmental Management Plan has been prepared for the long-term management of remnant contaminated soils and groundwater.

For more information and to view a copy of the Long-term Environmental Management Plan (EMP) click here.

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