It is the former carriageway approach to Belsize House, a country estate that occupied the area until it was demolished in 1853 to allow residential development.
[2] At the junction of Belsize Avenue with Haverstock Hill is the former Hampstead Town Hall, now Grade II listed.
[3] Notable former residents of the streets have included the actor Gordon Harker and the future Japanese Prime Minister Takeo Fukuda.
[4] In the 1930s Hillfield Court, an art deco apartment block was built on previously undeveloped land, and the actress Diana Wynyard live there at one point.
In the same decade some former tennis courts were developed into Tudor Close, featuring Tudoresque architecture.