The First Killarney House
It was Valentine Browne, 4th Earl of Kenmare, who decided to build a new mansion on a hillside with spectacular views of Lough Leane in 1872. The old manor, Kenmare House, was demolished and an Elizabethan-Revival manor house on a more elevated site erected. The cost was well over £100,000.
This house was supposed to have been instigated by Lady Kenmare (Gertrude Thynne, granddaughter of Thomas Thynne, 2nd Marquess of Bath) and inspired by Lord Bath's genuinely Elizabethan seat, Longleat, Wiltshire (which is not red-brick); but it was not unusual for the descendants of Elizabethan or Jacobean settlers in Ireland to assert their comparative antiquity in this period by building Jacobethan houses. The architect was George Devey but, according to Jeremy Williams, '... that feeling of being built up over the centuries that distinguished Devey's work was entirely lacking, partly due to the job being supervised by W.H. Lynn [the Belfast architect] at his most relentless ... The western-most gate lodge, gabled and galleried, [which survives, is] Devey at his most delightful.'
The house, in addition to its other defects, apparently did not sit happily in the landscape as it had many gables and many oriels. The interior was pannelled and hung with Spanish leather. It was considered one of the finest mansions in Ireland. Sadly, it was burnt out twice - once in 1879, just after its completion, and again, and finally, in August 1913 and never re-built. Instead Valentine Browne, 5th Earl of Kenmare decided to convert the nearby stable block of the old Kenmare House for family use, also naming it "Kenmare House".
In 1956 Mrs. Beatrice Grosvenor CBE (1915-1985), niece of the seventh Gerald Ralph Desmond Browne, 7th Earl of Kenmare (1896–1952) and granddaughter of the Duke of Westminster, built Knockreer House on the site of the former "Killarney House". This house and the surrounding land, formerly part of the Kenmare Estate of the Earls of Kenmare, were later donated by her to form Killarney National Park. 
The Second Killarney House
Also in 1956 Mrs. Grosvenor sold the second "Kenmare House" together with 25,000 acres (100 km2) to John McShain (1898-1989), an American building contractor. He and his wife Mary J. Horstmann (1907-1998) extensively renovated the building and renamed it "Killarney House". In 1978 Mr. McShain sold Killarney House and the greater part of the estate to the Irish State for a price well below market value at the time, having been assured that the house and estate would be incorporated into Killarney National Park. Mr. and Mrs. McShain reserved the house and surrounding 52 acres to their use for their lifetime. Mr. McShain died in 1989 and Mrs. McShain lived in the house until her death in 1998, when the house and surrounding land reverted to the Irish State. Having been empty for several years, the building fell into some disrepair. In July 2011 Leo Varadkar, the Irish Minister for Transport, Tourism and Sport, therefore announced a €7 million restoration of the manor.
- http://lordbelmontinnorthernireland.blogspot.ch/2011/08/kenmare-house.html Lord Belmont in Northern Ireland about Killarney House, 16 August 2011
- "€7m restoration for Killarney House announced". RTÉ News. Retrieved on 30 July 2011.
- Lucey, Anne. "Killarney House to be restored". The Irish Times. Retrieved on 30 July 2011.
- Killarney House reference at the Parliament of Ireland
- Lord Belmont in Northern Ireland about Killarney House, 16 August 2011
- Public Record Office of Northern Ireland: "Introduction Kenmare Papers", November 2007
- Killarney National Park: "Knockreer House"