Following a residential development at the north-west corner of Bowburn, falling within the Shincliffe parish boundaries, a small adjustment to boundaries was made in 2014 to bring the development wholly within Cassop-cum-Quarrington.
Many of the original homes on the current Parkhill housing estate were built for miners.
Because it is separated from Bowburn by the motorway, Parkhill is often mistaken for part of Coxhoe but in recent times Durham County Council set the record straight by erecting signs that clearly show that Parkhill is a distinct community.
[citation needed] The Clarence Villa Hotel, and the houses opposite the hotel (Clarence Villas) are both close to what was the Four Mile Bridge, which still defines the border between Parkhill and Coxhoe.
At the beginning the railway only linked Port Clarence, on Teesside, with neighbouring Stockton, but it was extended north in the 1830s.