IBC 107.2.1 Construction Document Requirements

IBC Section 107.2.1 sets the baseline for what a permit applicant has to put on paper. Construction documents must be dimensioned, drawn on suitable material, and clear enough to show the location, nature, and extent of the proposed work in detail sufficient to prove it will conform to the code and other applicable laws, ordinances, rules, and regulations as determined by the building official. Electronic submissions are allowed when the building official approves them.¹ That short rule is the gatekeeper for a wider set of IBC provisions that tell you exactly what the drawings have to carry.

What Section 107.2.1 Actually Requires

Three things, read together. Drawings must be dimensioned so the plan reviewer can verify measurements without scaling off a ruler. They must sit on suitable material, whether durable paper or an approved digital format. And they must have “sufficient clarity to indicate the location, nature and extent of the work proposed and show in detail that it will conform to the provisions of this code and relevant laws, ordinances, rules and regulations, as determined by the building official.”¹

“Sufficient clarity” is a judgment the building official makes. In practice it means legible text, distinguishable line weights, consistent symbols, and enough annotation that a plan reviewer can understand the full scope without calling the designer. Drawings that compress too much onto an unreadable sheet, omit key dimensions, or use ambiguous notation come back for revision.

The electronic media allowance is broad. Most jurisdictions now accept digital files through online permit portals, and the same clarity and dimensioning standards apply regardless of format.¹ A blurry PDF fails the same way a smudged paper set does.

Structural Data the Drawings Must Carry

The “show in detail” standard in 107.2.1 is general. Section 1603 is where the structural specifics live. If you want to know what information has to appear on the drawings for a building’s structural system, Section 1603.1 lists it in six categories:²

Floor live loads: the uniformly distributed, concentrated, and impact loads used in the design, along with any live load reductions applied.
Roof live loads: the design loads for all roof areas.
Snow load data: the ground snow load at a minimum. Where it exceeds 15 pounds per square foot, additional parameters are required, including the flat-roof snow load, exposure factor, thermal factor, slope factors, and drift surcharge loads.
Wind design data: basic wind speed, risk category, wind exposure, internal pressure coefficients, and design wind pressures for exterior cladding and components.
Earthquake design data: spectral response acceleration parameters, site class, seismic design category, the basic seismic force-resisting system, design base shear, and the analysis procedure used.
Flood design data: required for any building located wholly or partly in a flood hazard area.

Each category breaks down into multiple sub-items. Wind data alone calls for at least six separate values. Treating Section 1603 as a line-by-line checklist is the fastest way to avoid correction notices.²

Site Plan Contents

Section 107.2.6 requires every permit application to include a site plan drawn to scale and based on an accurate boundary line survey. It has to show:³

The size and location of new and existing structures on the site.
Distances from lot lines, so the building official can verify zoning setbacks.
Established street grades and proposed finished grades.
Flood hazard areas, floodways, and design flood elevations where applicable.

For demolition projects, the site plan has to identify what is being removed and what is remaining. The building official can waive or modify the site plan requirement for alterations, repairs, or other situations where a full boundary survey would be disproportionate to the scope of work.³

Flood data is a common sticking point. Where design flood elevations are not specified on FEMA maps or other published sources, Section 107.2.6.1 requires them to be established using the methodology in Section 1612.3.1. Skipping that step in a flood hazard area is a guaranteed rejection.

Fire Protection Shop Drawings

Shop drawings for fire protection systems follow a separate track under Section 107.2.2. They must be submitted to demonstrate conformance with both the code and the approved construction documents, and they must be approved before any installation begins.⁴ The drawings have to contain all information required by the installation standards referenced in IBC Chapter 9.

Fire protection systems such as sprinklers, standpipes, and fire alarm networks are usually designed by specialty contractors rather than the project’s architect or structural engineer, which is why the shop drawing requirement sits on its own. It gets those details in front of the building official before sprinkler heads go in the ceiling.

Who Signs and Coordinates the Documents

When the IBC or local law requires construction documents to be prepared by a registered design professional, Section 107.3.4 authorizes the building official to require the owner to designate a specific individual on the permit application as the “registered design professional in responsible charge.”⁵

That person’s job goes past signing a cover sheet. The design professional in responsible charge must review and coordinate all submittal documents prepared by others on the project to make sure they are compatible with the overall building design. On a commercial project, that means verifying the structural engineer’s calculations, the mechanical engineer’s equipment layouts, and the fire protection contractor’s shop drawings all work together. The building official looks to this person when design questions come up.

Deferred Submittals

Not every detail has to be finalized before the permit is issued. Section 107.3.4.1 lets certain submittal items be deferred with the building official’s prior approval.⁶ Common examples include steel joist engineering, curtain wall details, and specialty fire suppression layouts that fabricators or subcontractors design after the general permit is granted.

The review chain is specific. The registered design professional in responsible charge must list all deferred items on the original construction documents so the building official knows what is outstanding. When the deferred documents are ready, they go to the design professional in responsible charge first. That person reviews them, confirms they are in general conformance with the building design, and forwards them to the building official with a notation to that effect. No deferred item can be installed until the building official has approved its documents.⁶

After Submittal: Review, Approval, and Changes

The building official examines the construction documents to verify that the proposed work complies with the IBC and all other applicable laws and ordinances.⁷ When the documents pass review, they are approved in writing or by stamp as “Reviewed for Code Compliance.” One stamped set stays with the building department. The other goes back to the applicant.⁸

Phased Approval

The building official can issue a permit for foundations or other early-phase work before the complete set of construction documents has been approved, as long as the submitted information adequately covers the relevant code requirements for that phase. The permit holder proceeds at their own risk, with no assurance that the permit for the entire structure will be granted.⁷ If later submittals reveal code issues that affect the foundation design, the cost of correcting completed work falls on the owner.

The Approved Set Stays on Site

Section 107.3.1 requires the approved set of construction documents to be kept at the construction site and open to inspection by the building official or their authorized representative at all times during active work.⁸ Inspectors compare the physical work against the approved drawings at every inspection stage. If the approved documents are not available when the inspector arrives, the inspection cannot proceed.

Amendments During Construction

Changes during construction happen. When work deviates from the approved construction documents, Section 107.4 requires the changes to be resubmitted for approval as an amended set of construction documents before the altered work proceeds.⁷ The amendment follows the same review standards as the original submittal. The building official has to verify that the revised work still complies with the code before signing off. Undocumented field changes can result in failed inspections, mandatory removal of non-conforming work, or stop-work orders.

1
International Code Council. 2012 International Building Code – Chapter 1 Scope and Administration
2
International Code Council. 2024 International Building Code – Chapter 16 Structural Design
3
UpCodes. Illinois Building Code 2021 – Chapter 1 Scope and Administration
4
UpCodes. Illinois Building Code 2018 – Chapter 1 Scope and Administration
5
International Code Council. 2018 International Building Code – Section 107.3.4 Design Professional in Responsible Charge
6
International Code Council. 2021 International Building Code – Section 107.3.4.1 Deferred Submittals
7
International Code Council. 2021 International Building Code – Chapter 1 Scope and Administration
8
International Code Council. 2018 International Building Code – Chapter 1 Scope and Administration