In 1700, the first Earl made further extensions to the house in a manner, not unlike a French château which is virtually how it appears today.

The castle is protected as a category A listed building,[1] while the grounds are included in the Inventory of Gardens and Designed Landscapes in Scotland.

[2] When it was found in 2007 that the castle's concrete facing would soon need replacing, Lord Glasgow invited four Brazilian graffiti artists to decorate the walls.

[3] Following the opening of the grounds to the public, the estate buildings and stables were converted in 1980, to provide a tea room, shop and visitor information.

[2] In 2007 experts told the owners of Kelburn Castle that its concrete facing would eventually need to be replaced to avoid further damage to the stonework.

At the suggestion of his children, Lord Glasgow invited four Brazilian graffiti artists (Nunca, Nina and Os Gêmeos twins) to paint the walls.

[6] In September 2010 it was reported that Historic Scotland were putting pressure on Lord Glasgow to remove the graffiti,[7] although this was later denied by both parties.

[8] In August 2011 it was reported that the Earl had formally written to Historic Scotland asking permission to keep the graffiti as a permanent feature.

It was his decision to open the estate to the public in 1977, transforming the grounds and outhouses into play areas, a café, gift shop, etc, and also allowing access to the castle for tours.

Numerous family friendly events run throughout the year, offering outdoor, interactive, and creative fun.

In the space of just over half a mile, it rises on the moors over 800 feet above the castle and drops dramatically, by way of many waterfalls and gorges, to the sea.