The house, a Grade I listed building, is today used as a museum by the London Borough of Enfield.

The hall and formal park are located on the top of Forty Hill, a level gravel plateau standing above the flood plain of the River Lea to the east, and the valley of the Turkey Brook to the north and west.

The road to the east was formerly the main route from Enfield to Waltham Cross, but traffic has been re-routed via the A10.

A detailed examination was carried out for Enfield council as part of the Forty Hall Conservation Plan.

[4] This concluded that the house was probably not designed by a famous architect such as Inigo Jones, but by a "clever artisan builder".

In 1696 the hall passed to John Wolstenholme (probably a descendant of the financier and merchant of the same name and member of the Virginia Company), who carried out major refurbishment possibly following a fire, including construction of an extension to the south-west, and planted the avenue.

Later owners included Edmund Armstrong (1787) and James Meyer (1799), whose family built the nearby Jesus Church in 1835.