An archaeological watching brief was undertaken by Worcestershire Archaeology (WA) on 26th April 2021 at Oak House, Drury Lane, Martin Hussingtree (NGR SO 88219 60193). This comprised observation of a single C-shaped trench to accommodate foundations for the construction of an orangery, adjacent to Oak House. The project was commissioned by Elwood Heritage. Planning permission was granted by Wychavon District Council subject to a programme of archaeological works (planning reference 20/02306/HP). The archaeological advisor to Wychavon DC considered that the development had the potential to impact upon heritage assets associated with the 16th century farmstead of Martin Hall Farm, in which Oak House is situated. A building record and watching brief were considered appropriate mitigation works. This report sets out the results of the watching brief element; the building record was undertaken by Elmwood Heritage. The watching brief identified two brick walls abutting Oak House which are thought to be part of an east-west extension to the building depicted on the 2nd Edition Ordnance Survey map. Two fills identified within this structure result from the demolition and levelling of this extension after 1903.