3D Laser Scanning & BIM Coordination for General Contractors & Construction Managers
Renovation and retrofit projects rarely match their drawings. OAR provides 3D Laser Scanning, Scan to BIM, and BIM Coordination & Virtual Construction services that give general contractors and construction managers verified existing conditions, proactive clash detection, and ongoing field verification so trades mobilize on accurate data, not assumptions.
Based in Portsmouth, New Hampshire, OAR serves general contractors and construction managers across the Northeast: Connecticut, Massachusetts, Maine, New Hampshire, New York, Rhode Island, and Vermont. BIM Coordination & Virtual Construction is delivered remotely nationwide.
Renovation and retrofit projects rarely match the drawings.
Inaccurate or incomplete as-built drawings
Walls have moved, MEP systems have been altered, and structural modifications were never documented. When your trades discover these discrepancies in the field, it triggers RFIs, design revisions, and schedule delays. Without accurate existing conditions data, preconstruction planning becomes guesswork.
Subcontractors without BIM or VDC capabilities
Your MEP contractors, steel fabricators, and specialty trades often lack in-house laser scanning or BIM coordination resources. The burden of virtual coordination falls on your team, even when you do not have the bandwidth or technical staff to handle it effectively.
Field conflicts and rework during construction
Hidden conditions surface during demolition. HVAC ductwork clashes with structural beams. Plumbing routes conflict with electrical conduit. Every conflict means lost time, blown budgets, and frustrated owners. The cost of rework on renovation projects can erode your margin faster than any other factor.
Three services. One accountable partner.
3D Laser Scanning for Existing Conditions
Verified field data before you mobilize trades.
OAR captures your site with 3D Laser Scanning, documenting architectural features, structural elements, and MEP systems with millimeter-level accuracy. The resulting point cloud eliminates guesswork and gives your design team verified geometry for preconstruction planning.
BIM Coordination & Virtual Construction
Clashes resolved in the model before they reach the field.
OAR provides full BIM Coordination & Virtual Construction services: clash detection across all trades, coordination reports, and virtual design review. We work with your architectural, structural, and trade partners to resolve conflicts before fabrication. For subcontractors without BIM capabilities, we act as an extension of their team.
Digital Delivery & Implementation
Build the internal VDC capability your program needs.
For general contractors building internal VDC capabilities or preparing for AI-assisted construction workflows, OAR provides Digital Delivery & Implementation services. CDE configuration, BIM Execution Plans, data integration, and team training that connects scan data, design models, and construction intelligence into one system.
Project types we work on.
Existing conditions capture and BIM coordination for commercial build-outs, tenant improvements, and occupied building renovations where drawings do not reflect field conditions.
Scan-verified existing conditions for industrial facility retrofits, equipment installations, and capital upgrades where documentation is missing, outdated, or unreliable.
Millimeter-accurate existing conditions for healthcare and life sciences facilities with strict clearance requirements, infection control zones, and complex MEP systems.
OAR integrates into your design-build workflow as a full-service scanning and coordination partner. One partner managing the full chain from existing conditions to coordinated model delivery.
Full BIM Coordination & Virtual Construction for complex multi-trade programs where MEP, structural, and architectural systems need to be coordinated across multiple subcontractors.
Comprehensive as-built documentation combining final scan data with coordinated BIM models for owner handover, facility management, and future capital planning.
From existing conditions to construction-ready data.
High-accuracy LiDAR data in .RCP, .RCS, .E57, and .PTS formats, compatible with Revit, AutoCAD, Navisworks, and all major design platforms.
LOD 200-350 Revit models built from point cloud data: architectural, structural, and MEP components modeled to the level your project requires. Ready for clash detection and coordination.
Plans, sections, and elevations extracted from scan data or Revit models. For teams that need 2D documentation alongside 3D, delivered in .DWG format.
Every conflict across all trades identified, documented, and tracked. Hard clashes, soft clashes, and clearance violations all resolved in the model before fabrication.
Periodic scan-based comparison of installed work against the coordinated model. Deviation analysis with tolerance reporting to catch installation errors before they compound.
Final scan data combined with coordinated BIM models for owner handover. Accurate record drawings, operations documentation, and digital twin models for facility management.
BIM coordination for a complex renovation.
Life Sciences Laboratory Renovation MEP Trade Coordination
Massachusetts · Active Research Facility · Multi-Trade
Facility scanned post-demolition
Issues identified and tracked across trades
Rounds of clash detection across all systems
Timberline Construction engaged OAR to support the mechanical coordination effort on a complex life sciences renovation. The designed mechanical system was not constructable as drawn. OAR performed a LiDAR scan post-demolition, built a structural Revit model of existing conditions, set up a multi-trade coordination environment in Autodesk Construction Cloud, and ran five rounds of clash detection across mechanical, plumbing, HVAC, fire protection, electrical, and structural systems. Over 304 issues were identified and tracked. Subcontractors amended their installation plans before hitting conflicts in the field.
From the field.
Frequently asked questions
3D laser scanning uses LiDAR technology to capture millions of data points per second, creating a detailed point cloud that represents the exact geometry of a building or site. For construction projects, this provides accurate existing conditions documentation that can be converted into Revit models for design, coordination, and planning.
Scan to BIM converts point cloud data from laser scans into intelligent Revit models. General contractors need it to create coordination-ready models of existing conditions, enabling clash detection, accurate quantity takeoffs, and virtual construction planning before trades mobilize.
OAR’s laser scanners capture existing conditions at 2 to 6mm accuracy across the full scan area. This level of precision is sufficient for architectural modeling, MEP coordination, and fabrication planning on renovation projects.
Yes. OAR routinely scans occupied facilities and active job sites. We coordinate with your schedule to minimize disruption and can work during off-hours or weekends when needed. Our scanning process is non-intrusive and does not interfere with ongoing operations.
A typical 50,000 SF commercial building takes one to two days to scan. Point cloud processing takes three to five business days. Scan to BIM Revit models take two to four weeks depending on LOD requirements and project scope.
Yes. OAR provides full BIM Coordination & Virtual Construction services including interdisciplinary clash detection for mechanical, electrical, plumbing, fire protection, and structural systems. We generate coordination reports, facilitate virtual design meetings, and support your trades through shop drawing coordination.
Standard deliverables include registered point clouds (.RCP, .E57, .PTS), Revit BIM models (LOD 200-350), AutoCAD 2D drawings, coordination clash reports, field verification reports, and as-built closeout documentation. All deliverables are customized to your project specifications.
Laser scanning provides verified existing conditions before design and construction begin. This eliminates assumptions based on outdated drawings, enables proactive clash detection in virtual coordination, and allows field verification to catch installation errors early. The result is fewer surprises and better schedule predictability.
Tell us about your project: the building, the timeline, the challenge. We will figure out the right scope together.