Who we are

At Costello Co, we believe in authenticity and genuine connections. Our mission is to build trust through transparent communication, honest insights, and a commitment to delivering real value.

At the heart of Costello Co is Dominica—a strategic thinker, creative leader, and passionate property marketer with over 15 years’ experience working with some of the world’s most recognised brands, including Yamaha Music Australia, Coca-Cola, and Nickelodeon.

Bringing together a strong commercial mindset and a creative edge, Dominica has carved out a unique space in the property industry. Through Costello Co, she partners with boutique developers to transform visionary concepts into thriving, market-ready projects. Her end-to-end approach covers everything from branding and project positioning to go-to-market strategy, digital campaigns, and lead generation—each tailored to the unique DNA of the development and the audience it’s designed to serve.

Authenticity is at the core of everything Dominica does. She leads Costello Co with integrity, ensuring that every strategy is grounded in transparency, purpose, and real value. Her commitment to honest communication and meaningful connection has helped foster strong, trusted relationships with clients and communities alike—resulting in standout campaigns and successful sales outcomes.

Dominica is also the founder of List it Australia, a self-funded PropTech startup helping homeowners sell commission-free. Backed by the NSW Government Innovation Program, List it reflects her drive to challenge outdated industry models and bring fresh, accessible solutions to the property market.

Beyond her work in property, Dominica is a founding board member of Kids on the Border, a grassroots not-for-profit supporting families and children in the NSW Northern Rivers and Southern Gold Coast regions. Her involvement reflects a broader commitment to community impact, social responsibility, and creating positive change beyond business.

Whether empowering developers through Costello Co, reshaping the sales experience with List it Australia, or contributing to community initiatives, Dominica brings bold thinking, strategic insight, and a clear vision for the future of property.