[8][9] In July 2018, it was revealed that during restoration and renovations of the house and terraced gardens, archaeologists discovered that it had been constructed directly over a 5,500 year-old megalithic passage tomb.

[10] At the time of discovery of the first greywacke kerbstones in 2018, archaeologists including Clíodhna Ní Lionáin said it to be the most important megalithic find in Ireland in the past 50 years.

[12] The German government have also funded various other digs throughout the area as part of the 'Boyne to Brodgar' project, which studied links between Neolithic sites in the Boyne Valley and the Orkney Islands.

[15][16] The house, conservatory (built circa 1900), gate lodge and stables are listed on the Meath record of protected structures under the RPS ID 90706.

[17] While the exterior of Dowth Hall is relatively modest in both scale and decoration, it is for the detailed and varied interior rococo stucco work that the building is most notable.