Part of Sydney’s CBD is likely to become smoke free under plans for a trial ban provisionally endorsed by the City of Sydney.

Council voted unanimously late on Monday night to advance a proposal to ban smoking for six months in Martin Place.

Smoke free trial: Martin Place may be the beginning of a city-wide smoking ban. Credit:Louise Kennerley

The proposal was put forward by Liberal councillor Christine Forster.

Councillor Forster said she was motivated to propose the idea after seeing the success of smoking bans in other major cities' public places.