A leaking roof, mould, no hot water and "substandard electrics" are just some of the issues Port Fairy SES members are facing.
Unit controller Stephen McDowell said it was becoming more and more difficult to run the service from its Sackville Street site.
"The roof is in real need of repair but we haven't put any of our members up there to fix it because it is in such poor condition," Mr McDowell said.
The unit has been lobbying for about $2 million in funding from the state government to move to the town's former ambulance site.
It would share the site with the Port Fairy CFA.
"The water leaking through the roof is only one of a number of issues," Mr McDowell said.
"It's also very hard for us to gain access into and out of the site."
Mr McDowell said people often parked their cars in front of the access gate to the site.
He said it was only pure luck that this had not occurred during an emergency.
"It's been a concern now for a number of years - that we will get a priority call when we can't get out," Mr McDowell said. He said the unit's work load was increasing each year but it was increasingly difficult to attract new members with substandard facilities.
Member for South West Coast Roma Britnell said she had been lobbying for years for funds for new SES headquarters. She said the poor working conditions for volunteers were unacceptable.
In addition to that, taxpayer money is being used to "patch up" issues at the current site. "It's madness this has not been funded," Ms Britnell said.
"What kind of message are we sending to people who put their lives at risk on the worst night of the year?"
Ms Britnell said she was sick and tired of hearing about state-of-the-art facilities funded in Melbourne.
She said one had sparkling water on tap, while the Port Fairy SES headquarters didn't even have hot water.
A state government spokeswoman said a new site had been acquired for the SES on the Princes Highway.
"The Andrews Labor government has invested more than $54 million in VICSES facilities over the past three state budgets and will continue to work closely with local agencies and communities to ensure our hard working emergency service volunteers and staff have the resources they need to keep the community safe," she said.
"All emergency services proposals for funding are carefully assessed and those who are successful will be announced in line with the 2021 budget, as is standard practice."
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