Photo taken 10th August 2020

Grade II listed by Historic England. Summary:

Detached house. C18 with exterior of 1826. Stucco. 3 storeys. 3 windows wide. Central bowed solid sided pilastered porch with square headed entrance and flanking Greek Doric half columns. C20 door. Architraved windows, round headed to ground floor, square headed above; corniced to first floor centre, sashes, glazing bars. Blind boxes to ground floor. Cornice above second floor. Parapet.

The Lower Mitcham Heritage Map (pdf) produced by Merton Council said:

… became the residence of Lady Worsfold on the death of her husband Sir Cato Worsfold MP in 1936; still remembered for her dedication to local affairs and in particular her wartime work with the WVS and Girl Guide movement.

From chapter 10, page 85, of Eric Montague’s Mitcham Histories : 1 The Cricket Green

no. 7 comprises three storeys, terminating in a parapet hiding the roof from view, and is three bays wide with a centrally placed front entrance doorway. It is thus a typical house of the late 18th century, and could well be dated to the 1790s

There is a plaque:

The White House
This 18th century house was renovated in the Regency style in 1826 by Dr A.C. Bartley, a village doctor, whose daughter wrote reminiscences of old Mitcham. The house remained in his family until 1919.
Fluted Greek Doric columns support a slightly altered porch with a bowed front.