The three main aims are; To ensure the archaeological recording of previously unexposed historic building fabric, to ensure the archaeological recording of all aspects of the development programme likely to have an impact on the historic fabric of the building before and during the works and to provide an adequately detailed project report that will place the findings of the investigations in their local and regional context, with reference to the relevant regional research agendas. Methods The work was carried out according to the Written Scheme of Investigation (Pryor 2020) following the standards, conventions and specifications defined by Historic England (2016), which required: " A programme of historic building recording to Historic England Level 2-3 (HE 2016). The buildings were constructed on what had been agricultural fields since at least the 18th century. Organ Hall Farmhouse, which since at least the mid 19th century, was located to the south of the buildings burnt down and the site was developed as a modern housing estate in the 1990s. The farm buildings were relocated to the north of the pre-fabricated dwellings at much the same time. Precisely when the pre-fabricated houses were erected is not recorded. The Hertsmere planning portal has no entries for the site pre-dating 1971 despite maintaining online records dating from the late 1940s. It is likely that they were constructed in the late 1940s, although it is not impossible that they were put up in the 1950s. They are of a standard type of timber framed structure manufactured by Uni-Seco with asbestos sheeting insulated with wood wool supported on a brick dwarf wall and under a felt roof. The interior had the full gamut of luxuries including an inside WC and bathroom, fitted kitchen, built in cupboards elsewhere and fireplaces in the main rooms. Whilst the building was originally two dwellings, and the planning applications for the retention of the buildings is for two dwellings until 1991, the present layout suggests that in its later existence the structure may have been converted to a single dwelling