Earlier this year, proposals to repair parts of the façade of the courthouse due to the “immediate risk” of falling masonry were approved.
Scaffolding has been in place at the category A listed building for many months, which also falls within the Ayr Central Conservation Area.
The Scottish Courts and Tribunals Service (SCTS) also applied for permission to repair and refurbish 60 windows facing Wellington Square, Bath Place and Pavilion Road.
Planning documents state: “Due to the exposed nature of the building, many windows have deteriorated and now need to be replaced or repaired.
“The Scottish Courts and Tribunals Service are now planning a programme of remedial works to repair and restore the windows.
“As part of these works SCTS propose changing out the single glazing with high performance double glazed glass units to reduce the heat loss through the glazing and windows.
“This will also include the fitting of draft excluders on all the sliding sashes and parting beads to reduce drafts.
“All windows/sashes will be replaced as required in part or totally on a like-for-like basis, and any rotten timbers replaced.
“The windows will be treated and finished using an external paint system such as Dulux Weathershield Exterior applied in coats with primer, undercoat and two coats of finish coat.
“Any existing timbers that are retained should be stripped and treated in-situ before repainting.”
Approving the application, council planners said that “satisfactory information has been provided to demonstrate that the existing windows are in a state of disrepair”.
They added: “It is considered that the proposed works represent sound practice for the repair and maintenance of a category A listed building and allow the original windows to remain unaltered in shape, size, design and method of opening.”
The foundation stone for the building was laid in 1818 and it was completed in 1822 at a total cost of more than £30,000.
The building contained the Justiciary Court and also the County Buildings. The former County Hall now serves as courtroom two.
In common with many court buildings of the time, there was originally a prison to the rear of the court.
This was demolished in the 1930s and the site used to erect the Ayr County Buildings, which are now the home of South Ayrshire Council.
The courthouse was refurbished in the early 1990s and some courts and offices to the west date to this period.