In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Park House like this:
PARK HOUSE, an extra-parochial tract in Andover district, Hants; 9½ miles W of Andover. Pop., 7. House, 1.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Park House has changed, please see our redistricted information for the modern district of Salisbury. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Park House and units named after it.
GB Historical GIS / University of Portsmouth, History of Park House, in Salisbury and Hampshire | Map and description, A Vision of Britain through Time.
Date accessed: 27th October 2016
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Park House".