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Existing Conditions Surveys for Buildings, Sites and Assets
Capture the real-world condition of your site before design, construction, refurbishment or redevelopment work begins.
Start Your Project With Accurate Existing Conditions Data
Every successful design or construction project starts with a clear understanding of what is already on site. 3D Walkabout provides existing conditions surveys using professional 3D laser scanning to capture the current physical state of buildings, structures, interiors, façades, services areas and surrounding site context.
Our surveys help architects, engineers, builders, project managers, developers and asset owners reduce uncertainty before design or construction decisions are made. Instead of relying on incomplete drawings, old plans, rough site notes or isolated manual measurements, your team can work from a measurable digital record of the existing environment.
Existing conditions surveys are particularly useful before refurbishments, fitouts, extensions, adaptive reuse projects, building upgrades, tenancy changes, due diligence investigations and construction planning. The captured scan data can be used to produce point clouds, CAD drawings, elevations, sections, Revit models or other documentation required by your project team.
What This Service Helps You Understand
What Is Actually on Site
We capture the current layout, geometry and visible features of the building or site, giving your team a reliable record of existing conditions before work begins.
Where Design Risks May Exist
Existing conditions surveys help identify spatial constraints, undocumented changes, irregular geometry, access issues and potential clashes that may affect the design or construction process.
What Needs to Be Documented
From internal layouts and ceiling zones to façades, structural features and surrounding site context, we help define the right survey scope for your project requirements.
How the
Site Can Be Used
Survey data can support feasibility studies, concept design, detailed design, consultant coordination, construction planning, asset management and future building upgrades.
THE SERVICE
What Is an Existing Conditions Survey?
An existing conditions survey records the current physical condition of a building, asset or site. It is often completed before design, construction, renovation, leasing, asset upgrade or redevelopment work begins.
The purpose is not simply to create drawings. The real value is giving project teams a dependable understanding of the existing environment so they can make better technical and commercial decisions.
Using 3D laser scanning, we capture millions of measurement points across the surveyed area. This creates a high-density point cloud that can be used to measure, inspect, draft, model and verify existing site conditions. An existing conditions survey may include:
Internal room layouts and wall positions
Floor levels, ceiling heights and slab conditions
Doors, windows, openings and access points
Columns, beams, stairs, lift cores and major structural elements
External walls, façades and roof forms where safely accessible
Plant rooms, risers and visible services areas
Ceiling grids, bulkheads and exposed overhead features
Car parks, loading areas, external circulation and access zones
Surrounding structures, boundary interfaces and site context
Building irregularities, undocumented alterations or geometry changes
Point cloud files for design and coordination
2D CAD drawings, elevations and sections
Revit or BIM models where required
The level of detail is matched to the intended use. A feasibility study may only require broad spatial data and key measurements. A refurbishment design may require detailed CAD plans, elevations and ceiling information. A construction coordination project may need a point cloud or BIM model suitable for consultant review.
TIMING
When Should You Commission an Existing Conditions Survey?
Before Concept Design
Before Refurbishment or Adaptive Reuse
Before Construction Planning
Before Buying, Leasing or Redeveloping a Property
Before Consultant Coordination
RISK REDUCTION
Why Existing Conditions Surveys Reduce Risk in Design and Construction Projects
One of the biggest risks in refurbishment, redevelopment and fitout projects is poor existing site information. If the base drawings are wrong, every decision made from those drawings is exposed to risk. Walls may not be where expected. Ceiling heights may vary. Structural elements may have been modified. Services zones may be tighter than assumed. Access routes may not support the proposed construction method.
An existing conditions survey reduces this uncertainty by capturing the current site before design or construction work progresses too far. This allows project teams to identify constraints early, coordinate around real geometry and avoid making decisions based on outdated or incomplete information.
For architects and engineers, accurate existing conditions data supports better design. For builders, it helps reduce rework and site surprises. For asset owners and developers, it provides a more reliable basis for project planning, budgeting and decision-making.
FOR YOUR TEAM
Existing Conditions Survey Data for Architects, Engineers and Builders
Architects use existing conditions surveys to establish accurate base plans, understand spatial relationships and design around the real building fabric. Engineers use the data to check structural positions, levels, interfaces and constraints. Builders use it to coordinate construction methodology, staging, access and installation requirements.
Because 3D laser scanning captures the site in detail, the same dataset can support multiple teams. A point cloud may be used by a Revit modeller. CAD plans may be issued to architects. Elevations and sections may support façade or structural assessment. Remote stakeholders may use the scan data to check measurements without needing to attend site.
This makes existing conditions surveys especially valuable on projects involving multiple consultants, tight programmes, occupied buildings or complex construction interfaces.
DELIVERABLES
What You Can Receive From an Existing Conditions Survey
Registered Point Cloud
Existing Conditions CAD Plan
Elevations and Sections
Reflected Ceiling Information
For fitout, services coordination and refurbishment works, we can document ceiling layouts, bulkheads, visible services, lighting positions and overhead features.
Scan-to-BIM Models
If your project requires a model-based workflow, the survey data can be converted into a Revit or BIM model at the agreed level of detail.
Site Context Data
External areas, access paths, neighbouring structures, service yards, car parks, façades and surrounding site conditions can be captured where relevant.
KEY QUESTIONS
Questions an Existing Conditions Survey Helps Resolve
What Needs to Be Coordinated Early?
Existing building geometry can influence structural design, services coordination, fitout planning, façade works, access routes and construction staging.
What Constraints Will Affect the Design?
Ceiling heights, structural locations, wall alignments, floor levels, access limitations and services zones can all affect design feasibility and buildability.
Can the Team Reduce Site Visits?
With the right scan data and deliverables, consultants can answer many measurement and coordination questions remotely without repeated site attendance.
BENEFITS
Benefits of 3D Laser Scanning for Existing Conditions Surveys
Reduces design assumptions: Give your team measured site data instead of relying on outdated plans or manual notes.
Improves early decision-making: Understand site constraints before committing to design, cost or programme decisions.
Supports multiple consultants: Architects, engineers, builders and project managers can all work from the same source of information.
Captures complex geometry: Laser scanning is well suited to irregular buildings, heritage assets, plant areas, façades and hard-to-measure spaces.
Minimises repeat site visits: A detailed digital record allows teams to check measurements and conditions remotely.
Helps identify discrepancies: Compare current site conditions against existing drawings, design intent or previous documentation.
Improves coordination: Point clouds, CAD drawings and BIM models help reduce miscommunication between disciplines.
Supports faster design starts: Give design teams a reliable base so they can begin work with fewer unknowns.
Creates a permanent site record: Keep a digital snapshot of the building or site at a specific point in time.
Scales from small spaces to large assets: Use the same survey approach for tenancies, commercial buildings, industrial sites, residential developments and multi-site portfolios.
PROJECT TYPES
Common Project Types for Existing Conditions Surveys
Commercial Building Refurbishments
Capture current layouts, ceiling zones, structural features and access constraints before refurbishment design or construction planning begins.
Office and Workplace Fitouts
Provide architects and interior designers with accurate base documentation for space planning, fitout design and services coordination.
Industrial Facilities and Warehouses
Document large internal volumes, plant areas, equipment zones, structural grids, access routes and operational constraints.
Residential Developments and Multi-Residential Assets
Survey existing buildings before redevelopment, renovation, strata upgrades, façade work or internal reconfiguration.
Healthcare, Education and Public Buildings
Capture operational buildings where accuracy, staged access and reduced disruption are important.
Heritage and Adaptive Reuse Projects
Record complex or irregular building geometry before conservation, restoration or adaptive reuse design work begins.
PROCESS
How We Approach Existing Conditions Surveys
Process the Scan Data
Scan data is registered into a measurable digital point cloud.
WHY US
Built for Real Project Workflows
Built for Real Project Workflows
Useful When Drawings Are Missing or Unreliable
Better Information Before Bigger Decisions
One Dataset, Multiple Uses
Frequently Asked Questions
What is an existing conditions survey?
An existing conditions survey records the current physical state of a building, structure or site. It documents what is actually present at the time of survey, including layouts, dimensions, levels, visible features, structural elements and other agreed details. The information is commonly used before design, refurbishment, construction or redevelopment work begins.
How is an existing conditions survey different from an as-built survey?
The two services are closely related, but the emphasis is slightly different. An as-built survey usually focuses on documenting what has been built or what currently exists, often producing formal drawings or models. An existing conditions survey is often used earlier in the project to understand the current site, identify constraints and provide reliable base information for design, planning and coordination.
When should we commission an existing conditions survey?
Ideally, the survey should be completed before concept design, detailed design, construction planning or major commercial decisions are made. Early survey data helps prevent design assumptions from becoming costly problems later in the project.
What deliverables can we get from an existing conditions survey?
Typical deliverables include a registered point cloud, 2D CAD floor plans, elevations, sections, reflected ceiling plans, façade documentation, site context plans and Revit or BIM models. The exact outputs depend on the project brief and how the information will be used.
Can you work from existing drawings?
Yes. Existing drawings can be useful for planning the survey and understanding the building, but they should not always be treated as accurate. We can compare scan data against existing drawings where required and use the current site conditions to create updated documentation.
Do we need a full BIM model?
Not always. Some projects only need a point cloud or 2D CAD plans. Others need a detailed Revit model for coordination. The right deliverable depends on your workflow, project stage, consultant requirements and budget. We can help define the appropriate level of detail before the survey begins.
Can existing conditions surveys be completed in occupied buildings?
Yes. Many surveys are completed in live offices, commercial buildings, schools, healthcare facilities, retail environments and industrial sites. Access, safety requirements, working hours and disruption need to be planned in advance, but scanning can often be completed efficiently with minimal impact.
What level of detail can be captured?
The level of detail depends on the scope. We can capture broad spatial layouts, detailed architectural features, visible structural elements, ceiling zones, façades, plant areas and surrounding site context. Before scanning, we confirm what needs to be captured and what does not, so the survey is fit for purpose.
How accurate is a 3D laser scanned existing conditions survey?
3D laser scanning is a highly accurate method for capturing existing site geometry, but the final accuracy depends on the equipment, site access, scan methodology, registration process and deliverable requirements. We confirm the intended use and required accuracy before starting the survey.
Can the survey help identify problems before construction starts?
Yes. Existing conditions surveys can reveal discrepancies, undocumented changes, irregular geometry, access limitations and spatial constraints that may affect design or construction. This gives the project team a chance to resolve issues earlier, before they become expensive site problems.
Who typically uses existing conditions survey data?
Existing conditions survey data is used by architects, engineers, builders, project managers, developers, asset owners, facility managers, leasing teams and consultants. It provides a reliable foundation for planning, design, coordination, construction and long-term asset documentation.
Can this data be used for future projects?
Yes. A well-structured existing conditions survey can become part of the building’s long-term asset record. The data may be useful for future refurbishments, maintenance planning, compliance reviews, tenant changes, facility management and capital works planning.