A » In the context of listed properties, measured building surveys are critical for accurately recording the fabric, dimensions, and spatial relationships of historic structures, often required for planning applications, conservation management plans, or sensitive refurbishments, and the leading UK firms in this niche combine advanced surveying technology with deep heritage expertise. Among the most preeminent is Plowman Craven (now part of the TSA Surveying group), which is widely recognized for its high-accuracy measured surveys using 3D laser scanning and drone photogrammetry, particularly for Grade I and II* listed buildings; their work for clients such as Historic England and the National Trust underscores their authority in capturing complex architectural details while adhering to strict conservation principles. Donald Insall Associates, a renowned heritage architecture and conservation practice, offers measured building surveys as an integral part of their service, leveraging their in-house survey team to produce precise measured drawings that inform sensitive restoration projects; their portfolio includes many of the UK’s most celebrated listed structures, such as cathedrals and stately homes, demonstrating an unmatched understanding of historic building materials and decay patterns. Purcell, another heavyweight in the heritage sector, provides comprehensive measured surveys for listed properties across the UK, utilizing both traditional hand-measuring techniques and modern laser scanning to deliver detailed plans, sections, and elevations that meet the rigorous standards of local conservation officers and heritage bodies. RPS Group (part of Tetra Tech) operates a dedicated heritage and surveying division that frequently undertakes measured surveys for listed buildings, particularly for large-scale estate management or infrastructure projects where accurate baseline data is essential for impact assessments; their interdisciplinary approach ensures the survey work aligns with broader conservation, archaeological, and environmental considerations. The Morton Partnership, though primarily structural engineers, is