Hallam Mews is a small, T-shaped, cobbled cul-de-sac off Hallam Street in Westminster. There are 6 properties in the Mews, used for residential purposes. It is situated next to and similar in scale and location to Cavendish Mews North, another original/ surviving Mews.
A high explosive bomb fell directly onto Portland Place just behind the Mews in World War II. When the London Poverty Maps were published, the area was determined as being fairly comfortable with normal household earnings for the time.
Hallam Mews is situated to the east of the Harley Street Conservation Area in Westminster. First designated in 1968, the area is now dominated by terraced houses of different periods and different levels of social status. It retains a substantial medical presence, whilst offices predominate to the eastern edges.
The Mews serves the properties on Portland Place and contains a listed building; number 8 Hallam Mews by James Adam. The painted brickwork buildings have a mixture of mansard and parapet roof styles surrounded by a cobbled road surface.
The original purpose of the Mews was to provide stable/ coach house accommodation to the main houses on Portland Place. Now, it is predominantly used for residential purposes.
A few planning applications have been made before and since 2003 mainly roof extensions although major changes have occurred when some of the original buildings have been demolished. Conservation Area controls now apply to new development in the Mews.