The Castle Mona was designed by the eminent architect George Steuart, a native of Perthshire, Scotland, and who arrived on the Isle of Man in 1793. Amongst Steuart's other work were such places as Attingham Hall, Baronscourt and St Chad's Church, Shrewsbury. Apart from the Castle Mona, Steuart's chief work on the Isle of Man was the Red Pier, which with the lighthouse and courthouse he designed and directed the construction of between 1793 and 1799 and the Ramsey Courthouse. In addition Steuart designed the obelisk in Braddan Parish Churchyard commemorating Lord Henry Murray. The Castle Mona was constructed from stone brought from the Isle of Arran, the cost of construction being variously stated from £20,000 to £40,000 with other estimates placing the cost in excess of £50,000. The building was constructed as a perfect square, with an additional wing on the south side. A similar wing was intended for the north side but was never constructed. A circular tower is situated in the center of the structure. The wall facing the sea was ornamented with four plaques. One of the center plaques bearing the coat of arms of the Murray family to which the Duke of Atholl belonged; another bearing the arms of the earlier Earldom of Atholl. The domain adjoining the house was comparatively small terminating on the north side to a point now represented by the end of a row of shops, where a lodge was built. Another lodge stood on part of the site which today is Castle Terrace, and a drive ran through what is today Castle Mona Avenue - the site being formerly known as The Black Lawn. The ground behind the castle rises abruptly in the form of a cliff and this restricted the land available for the grounds of the actual mansion. This restriction led to the Duke's choice of the land to be criticised in some earlier guides to the Isle of Man. However the land behind the cliff, which was also owned by the Duke, stretched up as far as what today is the Glencrutchery Road and which at the time of the early 19th century was said to be thickly wooded. Following the death of the 4th Duke in 1830 the estate was sold, and it was initially planned to break up and apportion the land for building sites. This led to the notion of establishing a new town in the area to be called Woodville, however this merely resulted in a few late Georgian houses bordering on what today is Victoria Road.
Hotel
In 1831 the main building was converted into a hotel, with local architect John Welch being responsible for the alterations. The first manager of the hotel was William Mallett, who had previously run a London Coffee House. In 1836 the Castle Mona Hotel was bought by George Heron, who had come from the Portabello Hotel in Dublin. As a hotel it became celebrated, an early guest describing it as suitable to: "men of rank and fashion." Further alterations to the front of the hotel in the early 20th century saw the erection of a parade of shops. A subsequent addition which further increased the accommodation capacity was added with the erection of a north wing adjoining the original structure. By the 1960s the Castle Mona was widely regarded as the Isle of Man's premier hotel and was the venue of the first licensed casino. Subsequently, the Castle Mona went through various ownership until by the 1990s it had evolved, becoming a leisure and entertainment venue in addition to a 96 bedroom hotel. However a downturn in fortunes occurred in the early 2000s and the Castle Mona Hotel was put up for sale before being closed in 2006. In 2007 the Castle Mona was acquired by the Sefton Group for £4 million with the stated intention of investing in the premises. However no such investment was forthcoming and consequently the structure fell into a significant state of disrepair - the building continuing to languish before once again being placed up for sale in 2011. Various would-be purchasers expressed intentions to purchase the Castle Mona until it was eventually purchased at auction for £1.21 million in April 2018. The identity of the purchaser was kept secret until it was confirmed to be the Tevir Group, and Isle of Man-based property development company.
