Mr Rattenbury used his election-night speech to condemn Prime Minister Scott Morrison's plan to invest in fossil-fuel energy by expanding the gas industry.

This week, Mr Rattenbury said the rapidly falling price of renewables meant affordability should no longer be a deterrent for investment.

"The risk of investing in a lot of gas infrastructure now is either it will become white-elephant infrastructure or a stranded asset," he said. "Or there will be so much vested interest in continuing to use those assets to make sure they get an economic payback, that we'll keep using them for a long time, which is a real climate problem."

Mr Rattenbury said a Green recovery for Canberra would mean investment in renewable industries.

"We're already a hub for renewable energy here in the ACT, between research, management and training," he said. "But there is undoubtedly room for more than that going forward."

With the party's representation growing from two Legislative Assembly seats to six this week, the Greens will now be tasked with delivering the housing, homelessness, planning and climate change policies they based their campaign on.

The Greens have promised a $200 million investment in the creation of 600 rental properties and a $200 million investment to create 400 new social housing properties.

The campaign promises also included the creation of 4500 additional jobs in Canberra.

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Mr Rattenbury said the rental and social housing properties would be built to a high energy-efficiency standard, potentially fit with solar panels.

"Having to install those thousand-odd solar systems would create plenty of work for the solar-installing industry and all the related industries that go with it," he said.

Mr Rattenbury said in pursuit of a renewable future it was important to ensure a just transition and ensure all Canberrans benefited from the transition.

"That's why solar programs for low-income houses are really important," he said.