Council officers have recommended the dwelling, built in 1851 as the Belfast Episcopal School on Princes Street, receive a planning permit for a partial demolition, alterations and additions to the property.

Council documents stated the plans - which would demolish part of a first floor not in the original structure, and then extend that first level - aligned with the council's heritage policies and overlays.

But Port Fairy historian and resident Marten Syme opposes the design, saying it will "undermine standards of heritage building conservation in the town".

Mr Syme, in a submission to Tuesday's council meeting, took issue that previously approved additions to the building were being altered and that its appearance would change from Cox Street.

However, the applicant says in council documents that the design responds to heritage features and surrounds.

Meanwhile, councillors will also vote on Tuesday whether to join the Barwon South West Climate Alliance, being led by Warrnambool City.

The south-west is the last region in Victoria to be without a climate alliance, and officers have recommended that Moyne sign up.

Membership costs councils $15,000 a year and brings opportunities to participate in long-term projects such as bulk buying of electric vehicles, council documents say.

Councils including Geelong are already signing up but Colac Otway Shire narrowly voted to decline to join last week.

The council meeting will be online at 2pm on Tuesday.

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