Sealark: Sustainable property developers in NSW
Owned by The Halloran Trust, Sealark is for sustainable property development in the Shoalhaven region.
Sealark is a sustainable property development company owned by The Halloran Trust.
Our purpose is to develop site-specific land holdings to create communities that offer housing and lifestyle choices to benefit the local community and environment, and promote the Shoalhaven region’s future prosperity.
Each of our community developments will bring a choice of homes and associated amenities to the local area including parks, reserves, walkways and more. For the West Culburra and Callala Bay developments, Sealark has made a commitment that 10% of the dwellings will be for affordable housing in perpetuity.
We are different to other property development companies. Sealark is run by eight Directors and owned by a registered charity, The Halloran Trust. The Trust is a not-for-profit organisation that exists to provide financial support to beneficiaries, including in the Shoalhaven region. Revenue from Sealark’s property development services contribute to the Trust for this purpose.
We are part of the Halloran legacy in the Shoalhaven region which spans over 100 years.
100 +
years shaping the Shoalhaven region
90%
of our land holdings protected
10%
of the homes we develop will be affordable dwellings
- Sustainable, affordable housing
Sealark: a developer with a difference
Our property developments, including our new communities at West Culburra and Callala Bay, generate important revenue to enable The Halloran Trust to give to causes, charities and organisations which contribute to the protection of the local environment.
In doing so, we strive to create the ideal balance of social, economic and environmental outcomes to promote the long-term success of the communities we create, and the region in which our legacy spans over 100 years.
While the revenue from our property development services will be important to the causes, charities and organisations the Trust contributes to, we are not beholden to any shareholders and we are not driven by profits.
Warren Halloran, who established The Halloran Trust in 2012, believed the best way to protect the local environment in perpetuity, and contribute most effectively to its future prosperity, is through the sustainable development of the Trust’s most suitable land holdings in the area.
Sealark is committed to delivering on this vision.
- Sustainable, affordable housing
- The Halloran Trust
Established by Warren Halloran in 2012, The Halloran Trust is a not-for-profit organisation that exists to provide financial support from Sealark’s property development services to the local community and charitable beneficiaries, including in the Shoalhaven region.
- Supporting the community
The Halloran Trust provides funds to various community organisations, charitable causes and environmental protection initiatives which contribute to the richness of the local community, while Sealark directly supports local organisations too.
- Sustainability
Sealark’s approach draws on world-leading sustainable development principles and encompasses sustainable design and construction methods, healthy building materials, water management, active transport, biodiversity, waste management, and more.
- Biodiversity Stewardship
Sealark’s land holdings cover approximately 2,760 hectares. Of this, more than 90% is or will be protected in perpetuity and preserved for biodiversity conservation purposes.
- Affordable Housing
There is a significant lack of affordable housing in the Shoalhaven region. Sealark is not an affordable housing provider, but we are committed to partnering with experts who are.
Development Projects
Sealark’s property developments are founded on a legacy of residential developments up and down the coast of NSW stretching back over 100 years.

West Culburra
At West Culburra, Sealark is delivering new homes, a mixed-use commercial and retail precinct, business premises, parks and reserves to bring greater housing choice, affordable homes, new jobs and a vital economic injection to this beautiful town.

Callala Bay
As a natural extension to the village of Callala Bay, to the north of Emmett Street, east of Callala Beach Road and west of existing homes, Sealark is delivering a choice of new homes and amenities to complement the existing community.

East Crescent
Sealark has approval for a 14-lot subdivision on the East Crescent site in Culburra Beach.

Biodiversity Sites
Sealark owns a number of biodiversity stewardship sites, of which the Lake Wollumboola Biodiversity Stewardship Site is the largest. Sealark carefully manages these sites to protect and improve biodiversity values in perpetuity.
We strive to create the ideal balance of social, economic and environmental outcomes.
- Sustainable, affordable housing
Warren Halloran, who established The Halloran Trust in 2012, believed the best way to protect the local environment in perpetuity and contribute most effectively to its future prosperity is through the sustainable development of the Trust’s most suitable land holdings in the area. Sealark is committed to delivering on this vision.
Our developments generate important revenue to enable The Halloran Trust to give to causes, charities and organisations that contribute to the protection of the local environment. In doing so, we strive to create the ideal balance of social, economic and environmental outcomes to promote the long-term success of the communities we create, and the region in which our legacy spans over 100 years.
Latest News
West Culburra Council update – November 2024
The Sealark team recently briefed Councillors from Shoalhaven City Council on the plans for our
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Changes to speed limit on Culburra Road
2 October 24 Community -
Sealark the proud sponsor of local soccer clubs
9 February 24 Community