WIND farm opponents in southwest Victoria have sparked a rates revolt they expect to sweep the state.

Farmers near wind farms in the Southern Grampians and Moyne shires are being urged to seek valuation reviews.

 The action follows a decision by a Federal Magistrates Court judge that a property would be worth 17 per cent less and parts could be devalued by up to 33 per cent, if a neighbouring 14-turbine wind farm was built.

A South Gippsland Shire ratepayer next to the proposed Bald Hills wind farm has also had his lifestyle block's value reduced by 32 per cent to match rates paid on adjoining broadacre land.

Southern Grampians Landscape Guardians president Keith Staff, of Penshurst, said the two decisions would justify legal action on the issue and he had urged ratepayers to seek a revaluation.

Some Southern Grampians ratepayers have already asked for rating reviews and Mr Staff believed land revaluations near wind farms could cost Victorian councils hundreds of thousands of dollars.

However, South Gippsland Shire chief executive Tim Tamlin said the Bald Hills ratepayer had his rates reduced by about 30 per cent because his block was next to the proposed wind farm's concrete batching plant and there would be disruption during construction.

"I don't believe it is a precedent because valuation reviews are done on their own merits," Mr Tamlin said.

Southern Grampians Shire corporate services manager Belinda Johnson said the council did not propose to revalue properties adjacent to or near wind farms "outside the state-endorsed process".

The Moyne Shire Council has received revaluation requests from landowners around wind farms, but has said it would follow the current process for valuation reviews.

However, farmer Jan Hetherington, who shares a boundary with the Macarthur wind farm to the west and the Penshurst wind farm to the south, said rates should be cut.

"I am right in the dead centre of the wind farms, you might as well say my land is worthless," Mr Hetherington said.