Existing vs As-Built Surveys – What’s the Difference?
Existing vs As-Built Surveys – What’s the Difference?If you’re planning alterations, refurbishments or extensions, you may come across two...
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+44 20 4615 4666
hello@linesurveying.uk
At Line Surveying, we deliver high-accuracy topographical site surveys across London for residential, commercial and development projects.
Using advanced total stations, GNSS and laser scanning technology, we capture detailed land, level and feature data suitable for planning applications, architectural design and construction.
Our surveys provide precise ground levels, boundaries and site features — ensuring your drawings reflect the site exactly as it exists.
Our experienced survey team combines modern surveying equipment with robust site control to deliver dependable topographical data across London.
We capture detailed site information including:
Generate precise level data and feature mapping suitable for architects and engineers.
Essential for planning submissions, extensions and new build projects.
Detailed contour plans and digital terrain models (DTM).
Minimal disruption with professional site procedures.
Reduces design errors and unexpected ground issues.
1. Initial Consultation
We review site location, size, objectives and required outputs.
2. Site Control & Data Capture
Survey control established using GNSS and total stations to ensure accuracy.
3. Detailed Feature & Level Survey
We capture all relevant site features, boundaries and levels.
4. Data Processing & CAD Production
Survey data processed into scaled CAD drawings and models.
5. Final Deliverables
You receive accurate, fully annotated drawings ready for design and planning.
We record ground levels, buildings, boundaries, trees, services covers, drainage, kerbs, roads and other site features.
Our surveys are completed to survey-grade accuracy using calibrated professional equipment.
Yes. We supply DWG, PDF and other requested formats.
Yes. Topographical surveys are commonly required for planning and architectural design.
Most residential sites can be surveyed within a day, with drawings typically issued within a few working days.
We provide professional topographical site surveys throughout Greater London and surrounding areas for architects, developers and contractors.
A useful topographical brief defines the survey boundary, required features, level information and the relationship to the building drawings. Send a site plan and mark areas that are essential to the design, such as access routes, neighbouring interfaces or changes in ground level.
Agree whether the drawings should use a local grid or a specified coordinate system. Tell us about any existing project control or datum. Ground levels, visible structures, fences, trees, roads and surface drainage features can then be recorded within the agreed scope.
A survey can record the position of visible fences, walls and other features. Recording those features does not establish legal ownership or resolve a boundary dispute. Underground services are not established from surface observations; any detection work must be separately specified.
If the project includes an extension, refurbishment or a building that sits across changing levels, agree how the external survey will relate to the measured building drawings. Coordinated information helps the design team avoid mismatched origins and levels.
Our survey brief checklist covers the information to send when requesting a quote. Include access arrangements, the site extent, required file formats and your intended delivery date.
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