The Canberra Liberals have announced they will establish an independent commission against corruption in the ACT if they win government at October's election.

The commission would be charged with investigating allegations of corruption in Canberra, and ACT opposition leader Jeremy Hanson said it would strengthen the Liberals' already announced integrity package.

Mr Hanson said he was concerned by some of the ACT Government's conduct around property deals.

"After 15 years in power there is increasing concern in the community about the ethical conduct of the ACT Labor-Greens Government," he said.

"Recently there have been a number of issues of concern, particularly around property deals referred for investigation for the Auditor-General, and the Brumbies' property issues which are currently being investigated by the AFP."

Last month ACT Greens leader Shane Rattenbury announced the introduction of an independent integrity commissioner would form part of the Greens' campaign platform.

However he cited revelations that the Canberra Liberals had accepted donations from NSW property developers as reason for his concerns about misconduct.

When Mr Hanson announced the Liberals' integrity package three weeks ago, he rejected the need for an anti-corruption commission, saying it was not necessary in Canberra.

However he said consultations with the community since then had led him to believe an independent commission was the only way to secure public confidence in Government processes.

"I have listened to the community, and what they're telling me is that they want [a commission], that is the structure that they think will restore confidence in government," he said.

"I want people to believe that their government is conducting itself in the best interests of the community, not in the best interest of their mates."

Previously the ACT Government said it was confident a corruption commission was unnecessary, and that current measures to manage police misconduct were sufficient.

Chief Minister Andrew Barr released a statement saying ACT Labor would announce their policy in the coming weeks.

Mr Barr said his Government's main focus would be "to improve the standard of conduct, propriety and ethics in public authorities through adopting a strong education and prevention program".