The remaining station house building is grade II listed by Historic England, who said:
Circa 1800. Stock brick. Slate low pitched roof to eaves. Symmetrical composition. 2 storeys. 3 bays. Pediment over whole containing segmental headed window. Segmental headed recessed carriage entrance. Mainly square gauged headed sashed windows, glazing bars. Centre window to first floor with French casements; cast iron balcony with honeysuckle motifs. Console cornice. Chimneys to left and right. Formerly said to have been built for the horse drawn Surrey Iron Railway of 1803.
On the bridge over the line is a plaque commemorating the Surrey Iron Railway. When it was originally placed it could be seen from the railway station platform. The tram stop platforms however are further along, and so the plaque is not as visible.
Maps are reproduced with the permission of the National Library of Scotland.
The following images are clips from photos on Merton Memories. Click on the photo to see the original on that website.