The Mandurah community has been left devastated after a vandal caused extensive destruction to the almost 200-year-old Hall's Cottage last month.
The cottage has been closed to the public since August 31 after rocks were thrown at every accessible window, which caused damage to the original limestone walls, window frames and heritage listed furniture.
Despite being built in 1832 by Henry Edward Hall and his family, Mandurah Historical Society president Claire Cavanagh said the house had never been vandalised to this extent.
"We have had a cricket ball accidentally go through a window once but no one has ever vandalised the property to this extent," she said.
"It is just mindless and we were all very upset and distraught to see such damage.
"The glass is one thing as that can be replaced easily but the original frame of the windows and furniture has been broken, which is difficult to replace."
The heritage listed Hall's Cottage has been open to the public every Sunday as well as running school tours during the week since opening as a museum in 1975.
"We have got no income coming in at present because we are normally open every Sunday and we also have school tours so closing is a big loss," Ms Cavanagh said.
City of Mandurah director of works and services Allan Claydon said the City were working closely with the Department of Planning, Lands and Heritage to restore Hall's Cottage to its original condition.
"We've engaged a specialist heritage consultant to advise us on how to rectify the damage that has been done," he said.
"Given the age of the building things like windows and surrounds have to be done to those heritage requirements so it is taking us a little bit of time to redo the repairs but we are doing them under guidance from the right people."
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Mandurah mayor Rhys Williams was also disheartened by the damage to the heritage listed site.
"It was really disappointing to see this historic icon vandalised but it will be fixed," he said.
"What's important is that from time to time people are going to do the wrong thing but we will make improvements on the building so for generations to come people can continue to enjoy that historic icon."
