Challenge

Misura Geospatial was commissioned to conduct a detailed survey of Queripel House, located at 1 Duke of York Square, London SW3 on behalf of our client Cadogan Estates. The client aimed to improve the building’s layout, including the partial construction of a new floor and required an accurate verification of the existing structure to ensure compliance with the intended design.

Approach

The construction verification survey focused on the external facades and critical communal spaces. A key objective was to determine the precise distances between Queripel House, the adjacent building at No. 1 Duke of York Square, and the boundary wall along Cheltenham Terrace – ensuring any modifications could proceed with confidence and precision.

To achieve comprehensive coverage, our survey team deployed a Leica RTC360 3D laser scanner and DJI drone, capturing high-resolution spatial data from multiple locations around the building and on each floor. The survey adhered to an accuracy of ±10 mm, in line with the Royal Institution of Chartered Surveyors guidance (“Measured Surveys of Land, Buildings and Utilities, 3rd edition, 2014”).

Outcome

Captured data was processed in Leica Cyclone Register 360 Plus to generate a unified point cloud. The survey’s accuracy included results of bundle error, overlap, strength and cloud-to-cloud error.

The registered point cloud was then compared against the architectural drawings using Autodesk AutoCAD, ensuring every measurement was validated against the design. As the architectural drawings did not include an Above Ordnance Datum (AOD), Misura Geospatial established a Local Arbitrary Datum (LAD) at pavement level in the south-eastern corner of the building.

Our survey provided precise insights into the building’s dimensions and spatial relationships. These findings provided the client with clear, actionable data to guide the planned improvements while ensuring compliance with design specifications.

Misura Geospatial delivered a comprehensive, highly accurate verification survey that enabled Cadogan Estates Limited to confidently proceed with building modifications. By leveraging cutting-edge 3D scanning and drone technology, we provided a clear, data-driven understanding of the existing structure, helping to minimise risk, avoid costly errors, and support precise planning for future development.