I’m confused now.
Looking at the Robert’s family in the 1871 census, they are the only family living at Foxhall Newyd. The neighbouring Foxhall Has another Robert’s (related do you know?) farmer of 330 acres, employing men and servants. Looking at maps it is a much larger residence:
https://maps.nls.uk/geo/explore/side-by-side/#zoom=15.92624186187002&lat=53.19569&lon=-3.45044&layers=6&right=ESRIWorldAccording to the description, Foxhall Newyd was unfinished and abandoned at the end of the C18 and by the end of the C19 was already ruinous. Not sure what that means for the Robert’s family - perhaps they were living within the ruins or in a cottage in the vicinty?

In the 1861 census I didn’t see any mention of Foxhall Newyd which makes me wonder if it was uninhabited. Thomas Roberts’ address was “Foxhall Bach”. Looking at the Welsh dictionary Bach means lesser or minor. Next address was Foxhall with the same Roberts family as in 1871 living there.
The question is, was Foxhall Bach another name for Foxhall Newydd, or were the Roberts living on the Foxhall estate in a smaller lesser dwelling than Foxhall?
1851:
Thomas Roberts and family are at Foxhall Newyd but Thomas is a labourer and they have a servant in the house.
The Owens family are living next door at Foxhall with many servants.
Then listed separately there is an Evans family also at Foxhall Newyd, with head of family being a gamekeeper.
So no clearer.
