The state government has lined up a $90,000 Victoria's heritage grant that will be used with a $30,000 community support grant to preserve the 1882 building and the heritage of Yarra Junction.

Volunteer Tom O'Meara, who has been involved with the museum for almost two years, said the money would be used to fix the ailing roof and drainage of the station.

"There are volunteers at the museum who have been campaigning for this funding for decades," he said.

"A lot of them are getting older now and the numbers are diminishing. This funding will ensure that preservation will happen and their hard work won't be for nothing."

Mr O'Meara said the museum committee was meeting Yarra Ranges Council in the next week to discuss when work would begin.

His wife Rhonda O'Meara, also a museum volunteer, said it brought the number of grants received in the past year up to four.

Last July, the museum received $36,000 from the council to refurbish its main building after campaigning for funding for more than a decade.

Gembrook MP Brad Battin said the state grant was one of 13 community projects around Victoria to preserve and protect heritage-significant places and objects.

"This project will enable greater public access to the museum facility and increase tourism opportunities as part of the rail trail experience," he said.

The Upper Yarra Valley Historical Museum at 175 Warburton Highway, Yarra Junction, is open every Sunday and on most public holidays from 1.30-5pm.

For more information, visit upperyarramuseum.org.au.