NEWTOWNABBEY ratepayers are facing a potential bill of £25,000 for replacing eight windows at Sentry Hill.
The quote has been received from one company to carry out the work on the council owned 19th century farmhouse.
However, a council spokeswoman has said at least three quotes will be sought ahead of the work and an application for funding support has been made to the Environment Agency.
She said: “As with any of the council buildings there is an ongoing maintenance plan in place.
“Sentry Hill is an Accredited Museum and Listed Building Category B1, therefore, any building repairs must comply with listed buildings standards to ensure that the integrity of this historic building be maintained. This is also a requirement for obtaining listed building grant aid.
“A listed building grant application has also been submitted to the Northern Ireland Environment Agency [for 35 per cent funding] to part fund the project.”
Sentry Hill is open to the general public from April to September and to pre-booked groups throughout the year. Last year the tourist attraction on the Ballycraigy Road attracted 6,040 visitors.