Along with the other stations on the Morden extension, the building was designed by architect Charles Holden. They were Holden's first major project for the Underground.[8] He was selected by Frank Pick, general manager of the Underground Electric Railways Company of London (UERL), to design the stations after he was dissatisfied with designs produced by the UERL's own architect, Stanley Heaps.[9] Built with a shop to each side, the modernist design takes the form of a double-height three-sided box clad in white Portland stone with a three-part glazed screen on the front façade divided by columns of which the capitals are three-dimensional versions of the Underground roundel. The central panel of the screen contains a large version of the roundel. The station is a Grade II listed building.[6][note 1]
The station is close to Merton Bus garage which opened in 1913. The public house across the road is named "The Charles Holden" in honour of the station's architect.[12]