A farm animal sanctuary north of Brisbane has celebrated victory a year after the Department of Transport and Main Roads issued an ultimatum: pay $300,000 for a road upgrade or not be allowed to have visitors and build new facilities.

A change.org petition last year asking the then-Planning Minister Jackie Trad and Main Roads Minister Mark Bailey to find a way that visitor access to Farm Animal Rescue (FAR) could be maintained without the charity paying for the road upgrade, attracted more than 43,500 signatures.

The sanctuary's residents are rescued from neglect, abuse or slaughter, with supporters able to sponsor animals.

When the Labor Party was re-elected in the state election last year, the sanctuary in Dayboro was the first to benefit from the charity infrastructure fund, which paid for the road upgrade and led to plans for a new adoption barn and visitor program being approved.

The new facilities were officially opened by local MP Nikki Boyd on Sunday, with the adoption barn expected to allow the sanctuary to increase the number of farm animals it can rescue by 400 per cent during the next year and the visitor program was hoped to attract 40 guests every two weeks.