The County of Kent
The Newburgh family were lords in several counties. Some of their very earliest habitations remain, and some do not. One of the most fascinating exists in Tonge, Kent. There is a very extensive report on the Newbury farm which dates from the 13th century "Newbury farm in Tonge, Kent's Earliest Known Aisled Hall House" written by Rupert Austin published in 2003, Archaeologia Cantiana Vol. 123. I would highly recommend that you take the time to read this treatise. The drawings are wonderful.
This is the earliest known instances of the Newburgh family in Kent that I have discovered in my studies.
LULLINGSTONE CASTLE aka Shoreham Castle
The castle at Lullingstone went through many years of difficulties of possession. Originally the castle was part of the Poyntz Barony, which should have belonged to the Newburghs at the death of Nicholas Poyntz. Unfortunately, Sir Nicholas found himself in some very hot water because of his outlawry and the castle and his barony fell into abeyance. It seems the medieval Newburghs were always working to reclaim some parts of the barony even up until 1485 when John Newburgh Esq. died.
His son John Jr., son of his first wife Edith Attemore, was involved in attempting to regain control of Lullingstone and succeeded admirably when he became friends with Edward IV. This however, caused some tension with his father in Lulworth. Their politics didn't mesh, father being a Lancastrian and son choosing to follow the Yorkists.
While John Junior was working toward reacquiring Lullingstone, he also attended Edward’s Parliament for Dorset, 15 September 1472. (Members of Parliament, 1213-1702, 354, 360) By 1 July 1476, tensions between John Junior and his father must have eased somewhat, for in a new plea of covenant written between John Junior, the Esquire and his feoffees, they granted domicile to the Seyntclere’s who wished to live at Lullingstone. At that time, John Junior held two parts of the manor while his father and feoffees were possessed of only one.
(CP 25/1/117/337, number 184) Some history is missing. However, it appears the Esquire had the final upper hand in the family land transactions, because in 1481 the ownership of Lullingstone was transfered to John Jr.'s nephew John "the younger" son of his half-brother William. The castle stayed within his family line until the 16th century and was sold to the Polhill's in 1574.
The interesting thing about this castle in modern times is the extant "castle" is not the original. The name was transferred to the Hart-Dyke family's manor house/castle.
The present “Lullingstone Castle” manor house was originally known as “Cocksburst,” rather than Lullingstone. In the eighteenth century, during the reign of Queen Anne, the Hart-Dyke family petitioned to have the ancient name of Lullingstone transferred from the old Lullingstone Castle (aka Shoreham, Le Castille), and bestowed upon their home at Cockburst Manor. Between 1707 and 1714 the legal title for the Cockburst became LULLINGSTONE. In essence, for historians, the transference of title muddied the waters of historical recognition. For that which was formerly known as Lullingstone is now referred to as Shoreham Castle, Le Castille, and more modernly Castle Farm. The original castle is gone, but a Tudor style house takes its place. The modern farm is a spectacular vision with fields of lavender rolling to the Darent River.