The historic building recording work and structural watching brief were conducted in line with the WYAAS specification (2019) and Method Statement (Wessex Archaeology 2020), creating a permanent record of the buildings at Stonebridge Mills ahead of, and during, redevelopment works. The aim or purpose of the historic building record (in line with the CIfA Standard and guidance for archaeological investigation and recording of standing buildings or structures, Historic England's Understanding Historic Buildings: a guide to good practice and WYAAS's Specification for Photographic Building Recording and Structural Watching Brief at Stonebridge Mills, Stonebridge Lane, Leeds) was to: identify and objectively record by means of photographs and annotated plans any significant evidence for the original and subsequent historical form and functions of Stonebridge Mill. In order to meet the aims of the recording exercise, the mill complex was assessed as an integrated system intended to perform a specialised function. Particular attention was made in reconstructing as far as possible the functional arrangements and division of the buildings. The roles of historical plan form, technical layout/ layout and circulation/process flow were considered in this process of interpretation, as well as the provision of power for processes. Specific tasks included: producing a definitive phase of the mill's development based on the physical remains, site history and observations made during the recording process; to identify and record the use of materials throughout the existing site, in particular any early uses of cast iron columns in the mill's structure; to record the beam engine house; to identify and record any evidence and locations of at least two engines (and an early engine in the Old Mill); to identify and record the transmission of power throughout the site and how this evolved as the mill developed; and to record all the surviving buildings to an appropriate level, including early workshops, mills, warehouses, and offices. Stonebridge Mills comprises a large, evolved, integrated mill site which operated for the production of woollen, and later woollen and worsted, cloth. The phasing of the site is complex, and further complicated by multiple phases of progressive rebuild, replacement, repair, and alteration. As a consequence, it is not always clear to which 'phase' a building, or part therefore, ought to be allocated. The earliest elements of the site were constru...