Two Ways to Handle Multiple Floors
If you want all floors aligned into a single coordinate system, we can often connect them through stairwells and other shared vertical elements. When that’s not practical because stairwells are inaccessible, disconnected, or too irregular, we bring in survey control using total stations to tie the floors together independently.
Alternatively, some clients prefer each floor treated as its own project, delivered separately rather than merged. This is common on facility management projects where different teams manage different floors or departments.
Repetitive Floor Plans Save Time and Cost
In buildings with many similar rooms, apartment complexes, hotels, and dormitories, the layouts are often close enough that a client is comfortable assuming a typical floor plan. In these cases we scan one representative example of each room or suite type, then replicate that unit across the CAD or BIM model wherever it repeats. This cuts both scanning time and modeling cost significantly without sacrificing the accuracy that matters for the project.
Scanning Occupied Buildings
A major factor in apartment complexes and other residential buildings is whether units are occupied. Entering someone’s home requires advance notice, and access has to be quick to minimize disruption. Tenants aren’t always available on the scheduled day, which sometimes means a return visit. On rare occasions, occupants are unhappy about the situation entirely we’ve had a technician chased down a hallway during an eviction-related scan. Planning access carefully, and moving fast once inside, keeps these situations manageable.
Mobile Scanning Speeds Up Occupied and Large Buildings
To minimize time spent in residential or occupied spaces, mobile scanning is often the better tool for the job. We’ve had strong results with the NavVis VLX it’s fast, captures photos alongside geometry, and delivers enough resolution and accuracy for CAD modeling. We’ve also tested the Leica BLK2GO; in our experience, results were less consistent for this type of work.
Why It’s Worth Doing Right
Done well, 3D laser scanning of a large multi-story building is extremely valuable to architecture, engineering, and construction teams. It captures enormous amounts of accurate measurement data in a short time window, and that data supports planning, engineering, and verification long after the scan crew has left. It’s often the difference between a smooth project and a difficult one especially on buildings with no reliable as-built drawings to start from.
Scanning Above the Ceiling
Multi-story buildings usually mean multi-story mechanical, electrical, and plumbing systems, and most of that lives above the ceiling in the plenum space most people never see. On projects where MEP coordination, renovation, or clash detection is the goal, we open ceiling tiles or access panels floor by floor and scan the ductwork, conduit, sprinkler lines, and cable trays running overhead. This is where undocumented changes tend to hide the most: a rerouted duct from a past renovation, conduit that doesn’t match the original drawings, or a fire sprinkler line installed with less clearance than the plans show.
Above-ceiling scanning adds time to a project since each area has to be accessed and often re-covered afterward, and it usually calls for a scanner that handles tight, cluttered spaces well rather than a fast walkthrough tool. The payoff shows up in the deliverable: a BIM model that shows exactly where pipes, ducts, and conduit really run, not where a decades-old drawing says they should. That’s often the difference between a smooth mechanical retrofit and a contractor discovering a conflict mid-installation.
On multi-story buildings, we usually recommend above-ceiling scanning on at least a representative sample of floors, more if the building has gone through renovations at different times, since that’s exactly when plenum space is most likely to have drifted from the original design.
What Scanning Reveals in Older Buildings
Laser scanning regularly surfaces undocumented changes made over the years, things a walkthrough would never catch. A floor that’s four inches higher in one room than the next. A wall that’s not actually where the drawings say it is. These details matter for renovation and space planning, and they’re exactly why as-built data beats relying on decades-old drawings.
Frequently Asked Questions
How do you align 3D scans across multiple floors?
When possible, we tie floors together through stairwells and other shared vertical elements so everything sits in one coordinate system. When that’s not practical, we use survey control with total stations to align floors independently.
Can you scan occupied apartments or offices?
Yes. We coordinate access in advance with property management or tenants and use fast mobile scanning equipment to minimize time inside occupied units.
Do you need to scan every room in a large building?
Not always. In buildings with repetitive layouts, we can scan one representative unit of each room type and replicate it in the deliverable, reducing cost and turnaround time.
What equipment do you use for multi-story or high-rise scanning?
It depends on the building and access constraints: static laser scanners for maximum accuracy or mobile systems like the NavVis VLX for fast coverage across long corridors and multiple floors.
What deliverables come from a multi-story building scan?
Typically an aligned point cloud, 2D floor plans per level, 3D BIM models, and as-built drawings suitable for renovation, facility management, or space planning.
Do you scan above the ceiling for MEP systems?
Yes. For projects involving MEP coordination, renovation, or clash detection, we open ceiling tiles or access panels to scan ductwork, conduit, sprinkler lines, and cable trays in the plenum space, which frequently differs from original design drawings.
Scanning a Multi-Story Building?
Tell us about your building floor count, occupancy status, and what you need delivered, and we’ll recommend the right approach.
