Fancy owning a 15th century castle in South Ayrshire which comes complete with a coach house, a garden cottage and a lodge, as well as 310 acres of beautiful countryside?

Would the addition of a magnificent ballroom, an outdoor riding arena and a recent restoration which featured on a popular BBC show make the difference?

(Image: Knight Frank)

If so, then historic Cassillis Castle, just on the market for offers over £3.95million, could be the one for you.

Cassillis was owned and occupied by the Kennedy family from the early 15th century until 2009.

(Image: Knight Frank)

It is believed that the original castle was built in 1358 after the lands were granted by charter to the Kennedy’s after a marriage with a local heiress. It was from here that David Kennedy, First Earl of Cassillis took his title in 1502.

(Image: Knight Frank)

The two storey front was added by David Bryce between 1830 and 1832 for the 12th Earl and is one of the earliest examples of the Scottish Baronial style.

In more recent times, the refurbishment of the castle by the previous owner was tracked and featured in the BBC documentary programme “Restoration Homes”.

(Image: Knight Frank)

During this time, former staircases and a small room thought to be a secret hideaway were discovered hidden behind false walls.

Over the course of the four-year restoration, the tower roofs were rebuilt.

(Image: Knight Frank)

The castle still boasts many historical features. The spiral staircase, for example, is part of the original keep and is built clockwise, to ensure an easy defence by a right-handed swordsman.

Internally, gas central heating was installed during the restoration, with the facility to control remotely - and the property was rewired and redecorated throughout.

(Image: Knight Frank)

Both the house and the tower were remodelled to provide 13 bedrooms in total (seven with en suite facilities and five with dressing rooms), three further bathrooms and two WCs, a cinema room and a gymnasium.

(Image: Knight Frank)

The Coach House, Garden Cottage and the West Gate Lodge have also been restored to provide additional accommodation, ideally suited for staff or holiday lets.

The current owners have enhanced the estate further with the refurbishment of Stables Cottage, the creation of an outdoor riding arena, and construction of a large new general purpose shed. A small chapel has also been created.

(Image: Knight Frank)

The Castle is approached through electric gates via a private tarmac driveway which follows the River Doon.

(Image: Knight Frank)

The drawing room has vast windows which flood the space with natural light, and whilst the fireplace forms a centrepiece for the room, it is undoubtedly trumped by the fine ceiling plasterwork.

(Image: Knight Frank)

The inner hall and dining room also have grand fireplaces.

(Image: Knight Frank)

The ballroom and adjacent library on the second floor were originally the bedroom and living quarters of the Earls of Cassillis.

The ballroom at almost nine metres long offers wonderful entertaining space with fine views from the windows overlooking the River Doon below.

(Image: Knight Frank)

The original nurseries have been converted to provide a bedroom and en suite bathroom of generous proportions, but an unusual passageway through the 15th century thick castle walls provides a secondary access between the rooms, designed for staff.

The same passageway services the East and West Chintz bedrooms on the floor above.

(Image: Knight Frank)

The portcullis door marks the original Norman-style entrance to the Keep. From this entrance, a secret staircase (not marked on the floorplans) leads up to the East Chintz room.

The Bartizan bedrooms at the top of the Keep have been restored to their likely 17th century layout.

(Image: Knight Frank)

In total, there are 13 bedrooms across various floors, seven of which are en suite. In the lower ground floor, the former kitchen is now a well-equipped, modern dining kitchen with fitted walnut cabinets.

A butler’s pantry on the ground floor is conveniently situated adjacent to the dining room.

(Image: Knight Frank)

Across the passageway from the kitchen is a door to the castle courtyard, a sheltered sun trap. There are a number of stores off the courtyard.

In the basement, former store rooms have been remodelled to create a seven-seater cinema room with fully reclining seats, surround sound, Sky HD tv and projector screen.

(Image: Knight Frank)

The two adjoining rooms provide an ideal space as a gym and studio. Also within the basement is a well equipped laundry room and wine cellar with vaulted ceiling.

The property is being marketed by Knight Frank. To find out more visit tinyurl.com/knightfrankcassilliscastle.

Mortgage terms are available.