As-Built BIM Services
Avian delivers precise, field-verified as-built BIM models for Australia’s most demanding architecture, engineering, and construction projects.
From a single heritage building to a multi-storey commercial complex, our 3D laser scanning and BIM authoring workflows convert existing conditions into accurate, LOD-compliant Revit models, ready to plug straight into your design, coordination, or FM platform.
What are as-built BIM services?
As-built BIM services produce a verified digital model of a structure exactly as it exists today. Rather than relying on outdated drawings or field estimates, the process begins with a precise physical survey, then converts that data into a parametric, information-rich Building Information Model — a single source of truth every discipline can work from with confidence.
Measured site capture
Existing buildings or assets are surveyed using 3D laser scanning or other reality-capture methods, producing a millimetre-accurate point cloud of real-world conditions.
BIM authoring
Revit delivery
All models are authored natively in Autodesk Revit, ensuring full compatibility with your existing design and coordination workflows.
Verified accuracy
Core deliverables, one complete package
Every engagement is scoped and priced as a complete deliverable package — no hidden extras, no format surcharges. Standard outputs include:
LOD 100 to 500
The Level of Development you commission determines geometric precision, metadata richness, and downstream capability. Models are available at six standard levels — we scope the appropriate LOD with you before mobilisation, eliminating over-modelling costs and under-delivery risk.
Site capture to Revit delivery
A six-stage workflow designed to eliminate the ambiguity that inflates project risk. Every handover is backed by a signed QA report.
Site Survey & Pre-Scan Briefing
Our team walks the site, agrees the LOD with the client, defines the scan area, identifies access constraints (operational hours, security, OH&S), and confirms the deliverable list.
3D Laser Scanning & Reality Capture
Each scan station captures a 360° point cloud of its surroundings. Stations link via overlap or surveyed targets, depending on the precision specification. A 1,000 m² floor takes approximately 30–50 stations and one to two days on site.
Point Cloud Registration & Cleaning
Raw scans are aligned, classified, and cleaned. Vegetation, transient objects, and noise are removed; the registered cloud is decimated to a Revit-friendly density.
Revit BIM Authoring at the Specified LOD
Modellers build the BIM directly from the point cloud in Revit — walls, slabs, columns, ducts, pipes, doors, windows, and equipment placed by tracing or fitting against the cloud, with parameters populated from on-site capture. This stage accounts for 60–70% of total project time.
QA — Model-vs-Scan Deviation Verification
Every Revit element is checked against the source point cloud. A colour-mapped deviation heatmap is generated, and any element exceeding the agreed tolerance (commonly <10 mm RMS) is reworked.
Delivery, Handover & Revision Cycles
Final files are packaged and handed over. Two review rounds are standard — the first absorbs edits, the second closes out the project.
A calibrated fleet, matched to the site
No single scanner fits every project. Our team selects the right tool for site conditions, access constraints, and accuracy requirements.
Industries we serve
As built bim services support across the full spectrum of AEC disciplines. Each sector has distinct tolerances, regulatory obligations, and downstream use cases and we scope accordingly.
Architecture & Refurbishment
Accurate substrate for fit-out, retrofit, and adaptive reuse across commercial towers, shopping centres, and mixed-use assets.
Structural & Civil Engineering
Deflection surveys, structural assessments, and load-path verification with control-point accuracy.
MEP Coordination
Clash-free, services-rich BIM for plant upgrades and systems replacement in live operational environments.
Construction & Project Management
Construction set-out, progressive as-built milestones, and trade coordination on complex refurbishment sites.
Facility Management
Verified as-built models that integrate directly into CAFM and IWMS platforms for lifecycle asset management.
Heritage, Conservation & Adaptive Reuse
HBIM for conservation records, adaptive-reuse design, and interpretation of state-listed assets.
Project timelines
Most engagements complete within two to eight weeks from site access to final delivery. Timeline is driven primarily by building size, target LOD, and site access conditions.
How to choose a provider
Not all as-built BIM companies are equal, and the wrong choice can mean rework costs that dwarf the original fee. Here are the questions worth asking before you appoint.
Scanner accuracy specification
Confirm the provider uses calibrated terrestrial or mobile laser scanners with published accuracy specs. Photogrammetry-only workflows rarely achieve coordination-grade tolerances.
In-house Revit modelling
Outsourced modelling introduces quality risk and communication latency. Verify authoring is done by the provider’s own modellers, working directly against the point cloud.
Documented QA process
A credible provider can produce a deviation heatmap and model-vs-scan RMS report for every deliverable. If they cannot, the accuracy is unverified.
Sector experience
A heritage building requires different judgement than MEP coordination on a live hospital plant room. Confirm comparable projects in your sector.
LOD scoping competence
A provider who defaults every project to LOD 300 without discussing your downstream use case is likely over- or under-delivering.
Verifiable project portfolio
Ask for case studies, client references, and sample QA reports. Portfolio depth is the most reliable proxy for process maturity.
Confirm adequate professional indemnity and public liability cover, and practice aligned with current BIM standards (ISO 19650 / AS/NZS).
Why choose Avian
Delivered across a broad range of building typologies — giving us the pattern recognition to anticipate access challenges, model complexity, and QA edge cases before they become programme issues.
Our As Built Bim Projects in Melbourne
Popular Melbourne Metropolitan Area and Inner Suburbs We Cover
Contact the Avian today to discuss your land surveying project
FAQs about As Built Bim in Melbourne
We have answered some common questions that AEC clients have about our as Built Bim Service in Melbourne.
Pricing depends on building area, complexity, number of disciplines, and target LOD. A single-storey commercial fit-out at LOD 300 is priced differently from a federated, multi-discipline model of a heritage building at LOD 350. Contact Avian for a scoped fee proposal or check out our pricing guide for as-built surveys. We typically provide indicative pricing within 24 hours of receiving a project brief or existing drawings.
The terms are closely related but not identical. Scan-to-BIM refers specifically to the process of generating a BIM model from a laser-scan point cloud. As-built BIM services are the broader deliverable category, a model that represents existing conditions, which may be produced using laser scanning, total station survey, or a combination of both. In practice, most BIM as-built models in Melbourne use laser scanning as the primary capture method.
Yes, and LOD 500 is specifically designed for this purpose. A field-verified, asset-tagged Revit model can integrate with CAFM platforms, support maintenance scheduling, and underpin a full digital twin programme. Avian can include asset metadata schemas aligned to your FM system on request.
No. The point cloud becomes the primary reference; drawings, if available, are used only as a secondary check. Many as-built BIM commissions arise precisely because original drawings are unavailable, inaccurate, or have been lost over time.
Standard delivery includes .rvt (Revit), .ifc (open BIM), .nwd (Navisworks), .dwg and .pdf (2D drawings), .xlsx and .pdf (schedules), and .rcp / .e57 (registered point cloud). Additional formats are available on request.
LOD 300 is the most common starting point for renovation and refurbishment projects, providing ±15 mm geometric accuracy and specific type metadata for walls, floors, columns, doors, windows, and major services. Where trade coordination or clash-free documentation is required, LOD 350 is recommended. Avian will advise the most cost-effective LOD based on your specific design and approval requirements.
An as-designed BIM model reflects the design intent – what was planned and drawn. An as-built BIM model in Melbourne reflects the structure as it actually exists after construction, capturing deviations from the design, subsequent modifications, and existing conditions that were never formally documented. For any project involving an existing building, as-built BIM is the appropriate starting point.