What are the most common plan check issues?

The most common plan check issues are cross-discipline coordination conflicts (MEP vs. structure, fixtures vs. architecture), spec-vs-drawing contradictions, missing or inconsistent details across sheets, code-compliance gaps (egress, ADA, fire rating), and schedule/callout mismatches. Most are introduced during design revisions and copy-paste, and are catchable before permit submission.

What causes the most plan check rejections?

Frequent rejection drivers include incomplete or conflicting code-compliance information (occupancy, egress, accessibility, fire separation), missing details referenced on plans, and inconsistencies between disciplines. Catching these before submission is the fastest way to reduce plan check comments.

How do you prevent these issues?

Run a cross-discipline review of the full set (drawings, specs, and applicable codes) before you submit. AI plan checking flags coordination conflicts, spec-vs-drawing mismatches, and code gaps with evidence for each finding, so the team can resolve them on paper instead of in the field.

Educational Guide

Common Construction Drawing Errors and Plan Check Issues

A practical library of recurring drawing errors, real anonymized examples, and the review steps that help teams catch them before permit, bid, or construction.

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Recurring plan check issues include cross-discipline coordination conflicts, spec-vs-drawing contradictions, missing or inconsistent details, and code-compliance gaps. Many are introduced during revisions or incomplete coordination and can be found before permit submission. For issue-count distribution across a fixed set of published projects, see the AI plan check benchmarks.

Explore drawing errors by issue pattern

Each guide below combines a plain-language definition, published examples, review timing, and a checklist. The examples come from anonymized project reviews and require validation by the qualified professionals responsible for the work.

Dimension conflicts

Dimension conflicts happen when two parts of the construction documents assign different measurements to the same element. Here are real examples and a repeatable way to find them.

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Missing details

Missing information becomes an RFI when a contractor cannot determine the intended material, connection, dimension, location, or code-compliant assembly from the issued documents.

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MEP coordination

MEP coordination issues are not limited to geometric clashes. They also appear as conflicting capacities, locations, schedules, notes, controls, and access requirements across the document set.

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Fire and life safety

Fire and life safety errors often span architectural, electrical, mechanical, and fire-protection sheets. A compliant note in one place does not help when the plans and details contradict it elsewhere.

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ADA and accessibility

Accessibility errors often hide in the gap between a general compliance note and the dimensions, fixtures, slopes, doors, and routes actually shown on the plans.

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Common issues by discipline

Structural

Load-path discontinuities and connection details that don't carry through
Beam, column, and foundation callouts that conflict between plans and schedules
Missing or contradictory details referenced from structural sheets
Lateral system and code (IBC / ASCE 7) gaps

Targeted review: Structural plan check.

Architectural

Finish, door, and window schedules that don't match the plans
Dimension and room-area mismatches across sheets
ADA / accessibility clearances and egress path gaps
Wall types and ratings inconsistent between plan and details

Targeted review: Architectural drawing review.

MEP coordination

Duct-vs-pipe and conduit-vs-structure clashes
Electrical panel working-clearance (NEC) violations
Equipment specs that don't match schedule callouts (tonnage, CFM, voltage)
Plumbing risers that conflict with fixture counts or sizing

Targeted review: MEP plan review.

Civil

Grading and drainage conflicts; invert and datum inconsistencies
Utility coordination gaps and clashes
SWPPP / erosion control and site-plan QA gaps
Mismatches between civil and architectural site assumptions

Targeted review: Civil plan check.

Spec vs. drawing & code

Materials or products specified one way on drawings, another in the spec book
Code-compliance gaps (occupancy, egress, fire separation, accessibility)
References to details, sections, or sheets that don't exist
Copy-paste errors carried across revisions

Targeted review: Spec vs drawing checker.

The highest-risk issues often sit between disciplines

Single-discipline mistakes are common, but high-impact findings often sit between disciplines — a duct routed through a beam, a fixture where the architecture shows a wall, or a panel without documented working clearance. Those conditions appear when the full set is reviewed together rather than checking each trade in isolation.

See the underlying evidence

InspectMind findings include source locations and available code or specification references. Browse the case study library for published anonymized project examples, view a sample issue report, or read how the review works.

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Sample report: 282 issues found|Pricing after first check

227,181+ customer-visible issues across 2,000+ customer accounts