Repairs and
maintenance works

No repairs and maintenance works are currently underway at – or scheduled for – Chowder Bay / Gooree, Mosman. Continue to check here for updates. 

Mess Hall roof replacement

The Harbour Trust is replacing the roof of the Convict-era Mess Hall (B3A) – as well as the rooves of the adjoining 2 buildings (B3B an B3C) – due to rust. Works are anticipated to be completed in May 2026. During this time, all buildings will remain open to the public.

Biloela House repairs

Restoration Works to Biloela House commenced on 3 March 2025, these works look to refresh the interiors and reinterpret the exhibition spaces. We look forward to sharing the reimagining of this space with you soon.

Update (16/02/2026): Biloela House has undergone a refresh with new interior paint and new interpretation in some exhibition spaces with more to come in the coming months. Biloela House is currently open to the public.

No repairs and maintenance works are currently underway at – or scheduled for – Georges Heights, Mosman. Continue to check here for updates. 

No repairs and maintenance works are currently underway at – or scheduled for – Macquarie Lightstation. Continue to check here for updates. 

No repairs and maintenance works are currently underway at – or scheduled for – Marine Biological Station. Continue to check here for updates. 

No repairs and maintenance works are currently underway at – or scheduled for – Middle Head / Gubbuh Gubbuh. Continue to check here for updates. 

No repairs and maintenance works are currently underway at – or scheduled for – North Head Sanctuary. Continue to check here for updates. 

No repairs and maintenance works are currently underway at – or scheduled for – Sub Base Platypus. Continue to check here for updates

No repairs and maintenance works are currently underway at – or scheduled for – Woolwich Dock and Parklands. Continue to check here for updates. 

Bungaree Walkway upgrades (Headland Park)

The Bungaree Walkway was closed in July 2025 for upgrade works, including erosion control, drainage and stone step repairs. Visitors will benefit from a safer, non-slip pathway.

Visitor toilet repairs & upgrades (Cockatoo Island)

Work to repair and upgrade several public toilets on Cockatoo Island was completed in August 2024.

Mapping of underground services (all sites)

Work was undertaken by the Harbour Trust to map the location of underground services across our sites.

Chowder Bay Wharf (Chowder Bay)

The Harbour Trust undertook upgrades and replacement of the piles and decking of Chowder Bay Wharf, as well as the complete replacement of the adjacent boat slipway. During this work, there was no public access to the wharf or slipway.

This work commenced in February 2024 and was completed in December 2024.

Lift shaft and steel stair repairs (Cockatoo Island)

The Harbour Trust is undertaking maintenance and repair work on the lift shaft and steel stairs adjacent to Building 10 at Cockatoo Island. This work will return the steel staircase to public access and ensure structural stability for the lift shaft. During this time there will be no public access to the staircase.

Building 1 repairs (North Head Sanctuary)

The Harbour Trust undertook repairs and maintenance on Building 1 at North Head Sanctuary between March and early August 2024. This work involved removing hazardous materials from the building and protecting it from the elements, including making in watertight.  

Building 17 repairs & upgrades (North Head Sanctuary)

Building 17 at North Head Sanctuary underwent repairs and upgrades between August 2023 and May 2024. This work involved the removal of hazardous materials, installation of a new roof and complete renovation of the building. In July 2024, following completion of , the Harbour Trust sought expressions of interest from prospective tenants.

 Fire services upgrade (North Head Sanctuary)

The Harbour Trust completed work across North Head Sanctuary to upgrade the fire hydrant system in September 2023. This work will ensure that the fire safety standards across North Head Sanctuary are up to date. The work commenced October 2023 and the installation of new pipework, pumps and storage tanks has been completed.