In November 2014 Archaeology South-East carried out a programme of historic buildings recording in connection to the development of the land to the rear of 20-21 High Street, Lewes, East Sussex, ( NGR: 541745 110133). The work was commissioned by Natterjack Construction Ltd to satisfy conditions attached to planning permission (planning ref: SDNP/13/01188/FUL) for the redevelopment of the site in preparation for the construction of four new residential units. The proposed redevelopment includes the demolition of two single storey brick / flint buildings and alterations to an adjacent low retaining wall which borders a substantial vaulted cellar. The two buildings, which are locally referred to as 'Chaise House' and 'Stable', date to the 19th century. Although their original functions are now not clear, they seem to have formed auxiliary structures providing workshop / storage space of the sort often found at the rear of long-established high street properties. The two buildings have undergone alterations since their original construction, with a period of extensive development c.1980 to Building 1. The low retaining wall encompasses several phases of construction predominantly of 19th century date.