Horton Kirby Conservation Area covers some 12 hectares and contains 10 listed buildings. It was designated in 1974 and was extended in 1990. The countryside around is designated as Green Belt, which extends into the boundaries of the Conservation Area. The Area also lies within the Kent Special Landscape Area.
The Conservation Area includes the main route through the village, Horton Road and The Street which runs north to south, with open grassed land interspersed within the village and Court Lodge Farm to the north. The River Darent is an important feature of the area.
The Conservation Area is divided into two clearly defined sections. The northern most section is of a rural setting with St Mary’s Church and scattered domestic buildings centred around the surviving farm which once supported the village.
The southern area is generally of later date and has been largely influenced by the industry associated with the mill located at the centre of the Conservation Area.
All of the buildings within the Area are now privately owned residences, but in previous years this part of the village supported various small retail outlets.