Northwood is a town of London. In the London Borough of Hillingdon. Much of Northwood has been declared a conservation area to protect beautiful period buildings and scenic townscapes as well as the lovely, leafy Dene Road and the private Copsewood Estate, home to some gorgeous multi-million-pound mansions. An area of Northwood has been put under a place of particular interest restriction, as the area, including the old High Street, Chester Road and Hallowell Road has many Victorian houses and the roads form a triangular figure. The name Northwood refers to the fact the town is located on the "north wood" of the area of Ruislip.