I strongly suspect North's Seat is a red herring and advise you to forget about it. North's Seat is the highest point for several miles on former agricultural land donated by Hastings MP Fred North. There was previously a windmill at this location, but I know of no other buildings. The Down farm estate appeared in the late 1950s. Other buildings have appeared more recently, but North's Seat remains fairly isolated to this day.
The only police station I know of in the Ore area that fits was at the south eastern end of Winchelsea Road at it's junction with the Ridge. This police station existed until the 1960s when it was demolished and replaced by housing. It was called St Helen's Police Station and (according to the national archives, which often contains errors) was built in or after 1882. It may have had other names and was certainly referred to by other names (Winchelsea Road Police Station; The Ridge Police Station). The name "North Row" is new to me, but a few minutes research shows that it did indeed relate to this area. It seems that Hastings sometimes gave temporary names to areas to avoid repeated renumbering of buildings until a street was fully developed, which may have been the case here. Ore was once an area of desperate poverty. There was a very large workhouse (later called St. Helen's Hospital) to the south of the police station in Cackle Street (now called Frederick Road, named after workhouse boss Fred Tuppenny).
http://www.nationalarchives.gov.uk/a2a/records.aspx?cat=179-dhbb&cid=1-1-508#1-1-508The Google picture shows the approximate site in 2009 and corresponds roughly to the black and white picture. I don't know of any really good pictures of police station available online, but the black and white Sussex OPC one shows the police station on the extreme right. The Miller's Arms pub is on the opposite side of the road in the distance above and slightly to the right of the cart.
The Northern end of Winchelsea Road is usually considered now to be in Guestling and was renamed Winchelsea Lane in about 1963 following the construction of a new road (Rye Road) which cut Winchelsea Road in two and replaced the centre section (Winchelsea Road's other pub, the King's Head, is now in Rye Road).
I know of no police station ever existing in any other part of Winchelsea Road. That doesn't mean there wasn't one, it just means I don't know about one.
A number of other roads in the immediate area have been renamed:
This part of the Ridge was formally part of Old London Road;
nearby Victoria Avenue was once called Queen's Road;
Greville Road was formally Serpentine Road.
