More than 100 of Australia's best environmentally sustainable homes will open their doors to the public on Sustainable House Day.  

The national event on Sunday 11 September will give consumers a rare view of exceptional homes designed, built or renovated with sustainability in mind and allow them to speak to and learn from homeowners.

Sustainable House Day is run by the not-for-profit Alternative Technology Association (ATA) and sponsored by the Australian Government's Department of the Environment and Energy.

Donna Luckman, ATA's chief executive, said the day would be a fun and informative experience, showing what was possible in sustainable living.

"Building or renovating green is not just good for the environment, it saves households money in the long-term and creates more comfortable homes," Luckman said.

"Homeowners are continuing to push the boundaries, and people are likely to see some amazing, innovative sustainable design."

All homes opening their doors have a minimum of three sustainable features, including sustainable lifestyles and energy saving and healthy home practices.

Among the homes on show are a few former Sustainability Awards finalists and a former winner of Solar Decathlon (an award-winning program that challenges collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive):