- The cost of a violation is set less by the code section than by when it's discovered — after cover-up, everything is expensive.
- Means-of-egress, fire-rated penetrations, ADA clearances, electrical working space, and guard/handrail geometry are the perennial budget-killers.
- Each has a known cheapest-catch moment, and it's always before the next trade covers the work.
- In-line detection against the code and the model turns these from inspection surprises into same-day fixes.
What makes a violation expensive
Ask what the most expensive code violations are and people expect exotic answers. The truth from the field: the expensive ones are ordinary details discovered late. Cost tracks discovery time, not severity. A violation caught before cover-up is a task; the same violation caught at final is demolition, resequencing, and a re-inspection cycle.
These five categories earn their reputation because they're easy to build wrong, invisible after finishes, and non-negotiable with the inspector.
The five that bite hardest
- 1. Means of egress (IBC Chapter 10). Corridor widths, door clear widths, swing directions, hardware. A corridor framed a couple of inches narrow is drywall demo by the time anyone measures it — and egress is the one category where no inspector has discretion to wave it through. Catch it: at layout and framing, against the current sheet.
- 2. Penetrations of fire-rated assemblies (IBC Section 714). Every pipe, conduit, and duct through a rated wall needs a listed firestop system — not 'some red caulk.' Violations hide above ceilings by the hundred and surface during above-ceiling inspection or, worse, a fire-marshal walk. Catch it: trade by trade, penetration by penetration, before ceilings close.
- 3. Accessibility clearances (ADA / ICC A117.1). Toilet-room turning circles, fixture clearances, ramp slopes, reach ranges. A restroom an inch tight fails when it's fully tiled and fixtured — the maximum-cost moment — and accessibility findings can resurface after occupancy as legal exposure. Catch it: at rough-in layout, not at casework install.
- 4. Electrical working clearances (NEC 110.26). The panel gets set, then someone frames a wall, hangs a duct, or mounts a shelf inside the required working space. It reads as free real estate to every other trade. Catch it: every time any trade builds near electrical gear — which means the check has to be continuous, not scheduled.
- 5. Guard and handrail geometry (IBC Sections 1014–1015). Heights, the 4-inch sphere rule, graspability, extensions. Fabricated off-site from an old detail, discovered at final when the railing is already welded and finished. Catch it: at shop-drawing review and again at first installation.
“Cost tracks discovery time, not severity. After cover-up, everything is expensive.”
The pattern — and the fix
Notice what all five share: each has a cheapest-catch moment, and it's always before the next trade covers the work. The industry misses those moments because checking requires someone to stand in the right spot with the right code section at the right hour, hundreds of times per project.
That's a job description for software, not a person. Corevis runs the check continuously from the wearer's point of view — dimensions against the model, penetrations against rated assemblies, clearances against the accessibility standard — and flags the deviation with the code section attached, while the trade that created it is still on the floor. The inspector should be the second person to find the problem, never the first.