Private workplaces in Victoria are able to return to 50 per cent capacity from Monday, with public service offices permitted to ramp up to 25 per cent.

"Our message to workers returning to the city is that we've missed you, welcome back," Melbourne Lord Mayor Sally Capp said in a statement.

A Roy Morgan survey of 503 city workers from late November to mid-December shows almost two-thirds were either willing to return to their central Melbourne workplaces (44 per cent) or had already (15 per cent).

The most commonly cited factors making workers feel safe to return were COVID-safe plans and adherence to health measures.

Nearly 60 per cent of people surveyed wanted to return to the workplace for improved health and wellbeing, while 53 per cent were motivated by the improved productivity of the office environment.

The survey, commissioned on behalf of the City of Melbourne, found only 10 per cent of respondents were not willing to return to the office at all.

"Our research shows that while many people have embraced greater flexibility and convenience working from home, they don't want to live at work," Ms Capp said

Victoria's staged return-to-work plan was delayed a week to allow health authorities to mop up the Black Rock cluster, seeded by Sydney's northern beaches outbreak.

Mask rules also ease to pre-Christmas levels from Monday, making them mandatory in limited settings including supermarkets, large indoor retail areas, public transport, hospitals and airports.

Australian Associated Press