Davis Ducart designed the three storey over basement, seven bay building in the Palladian style.

[1] The design was commissioned by the Lord Archbishop of Cashel, The Most Reverend Michael Cox in 1767.

[4] In 2019, Lord Magan was evicted from Castletown Cox for failure to make rental payments of €100,000 per annum to the trust he had placed the estate into.

[5] The formal gardens were designed by the Dowager Marchioness of Salisbury.

[4] The National Inventory of Architectural Heritage lists the grounds as having the main features substantially present (ref.