The Kingsmere station on the Moors Valley Railway is to get a new roof and front elevation to give it a better look.
The former dairy farm buildings, being used as a station and storage, is currently subject to leaks and an uneven design.
Dorset councillors have agreed to the removal of the existing roof and for it be replaced with new, insulated, cladding with an open, covered ridge.
Other changes approved include the front, brick elevation of shed number 0043 to be partly demolished and re-built to match the front elevation of the adjacent shed in a saw-tooth design, and windows to another workshop to be bricked up with the front elevation of other areas to be extended vertically to allow for the continuation of the roof line from store area.
Ward councillor Cllr Barry Gorringe says the attraction would be improved by the changes and proposed agreement at a Dorset Council area planning committee on Wednesday.
Other councillors agreed – passing the application unanimously.