An as-built survey is a record of the actual physical condition of a building, site or structure at the time of survey. It shows what exists on site, rather than what was originally designed or documented. For existing buildings, this is especially important because drawings are often outdated, incomplete or inconsistent with the current layout.

A traditional measured survey usually relies on manual measurements, sketches and selective site notes. A laser-scanned as-built survey captures a much more comprehensive dataset by recording millions of points across the site. This creates a measurable 3D point cloud that can be used to produce drawings, models and additional information after the site visit.

Depending on the scope, we can provide registered point cloud files, 2D CAD floor plans, elevations, sections, reflected ceiling plans, façade drawings, roof plans, Revit models and BIM-ready documentation. The deliverables are agreed before the survey so the scan capture and post-processing match your project requirements.

It depends on how the data will be used. If your design team can work directly from scan data, a registered point cloud may be enough. If you need conventional documentation, CAD plans, elevations and sections may be more suitable. If the project is being coordinated in Revit or requires model-based collaboration, a BIM model may be the better option.

Yes. Many as-built surveys are completed in operational or occupied buildings, including offices, retail spaces, commercial properties, healthcare environments, education facilities and industrial sites. Access, safety requirements and working hours should be discussed in advance so the scan can be planned with minimal disruption.

Laser scanning provides a highly accurate method of capturing existing site conditions, but the practical accuracy of the final deliverables depends on the equipment, site conditions, scan control, registration process and required output. We confirm the required level of accuracy and detail before starting so the survey methodology suits the intended use.

Yes. That is one of the main reasons clients use 3D laser scanning. If original drawings are missing, unreliable or outdated, we can scan the building and create new documentation based on the current site condition. This is useful for refurbishment, leasing, compliance, facility management and future design works.

Yes. The registered point cloud can be used as the basis for Scan-to-BIM modelling. We can create Revit models from the scan data to an agreed level of detail, depending on whether you need architectural elements, structural components, visible services, façade information or a broader building model.

An as-built survey can include internal spaces, external elevations, façades, roofs where safely accessible, plant rooms, services areas, basements, stairwells, lift cores, car parks, surrounding site context and other accessible areas. The exact scope depends on the project objectives and site access.

Timing depends on the size and complexity of the building, access conditions, level of detail and the deliverables required. Site capture can often be completed faster than traditional measurement, but drafting and modelling time varies significantly depending on whether you need simple plans, detailed CAD documentation or a full BIM model.

As-built survey data is commonly used by architects, engineers, builders, developers, project managers, asset owners, facility managers, leasing teams and government organisations. It provides a reliable base for design, planning, construction, coordination, verification and long-term asset documentation.