Topographical Surveys in London

London plots are typically small, constrained and hard against their neighbours. Boundaries, party walls and rights of light matter intensely, so the survey has to record the extent and the physically evidenced boundary features carefully, because so much of the design and the neighbourly negotiation depends on exactly where the line sits and how the site relates to the buildings around it.

Most London schemes need an accurate existing-site drawing for a planning submission to the borough. A topographical survey provides precisely that: levels, boundaries and features tied to a datum, giving the planning authority and your design team a dependable, measured record of the site as it stands rather than an approximation.

Between tall buildings, satellite positioning becomes less reliable. In these urban canyons the signals a GNSS receiver depends on are blocked by the surrounding structures or reflected off them, which degrades accuracy, a well-documented limitation of satellite positioning in dense city centres. We manage this by establishing control and running total-station traverses tied to Ordnance Survey where required, rather than relying on GNSS alone, so the survey holds its accuracy even in the densest parts of the city.

• Small, constrained plots hard against neighbouring buildings and party walls
• Careful recording of extent and physically evidenced boundary features
• Existing-site drawings for planning submissions to London boroughs
• Robust control where GNSS is unreliable between tall buildings
• Levels tied to an Ordnance Survey datum for coordination with other surveys

We record the full surface detail your project requires: levels and contours, hard and soft features, physically evidenced boundaries, and surface drainage and utility features such as manholes and gullies with invert levels where accessible. The survey is tied to a horizontal and vertical datum, referenced to Ordnance Survey where needed so it coordinates with the wider mapping and with other surveys of the same site.

Deliverables are provided as layered CAD (DWG/DXF) in 2D and 3D as required, and where the site has been captured by laser scanning we can supply the underlying point cloud alongside. Because the survey is tied to established control, we can use the same control to set the design out accurately on the ground later.