1.3 Construction Documents & Plan-Review Adequacy (R103)
Key Takeaways
- 2021 IECC R103.2 requires, as applicable, the energy compliance path; insulation materials and R-values; fenestration U-factor and SHGC; area-weighted calculations; mechanical design criteria; equipment type, size, and efficiency; controls; duct sealing, insulation, and location; and air-sealing details.
- R103.2.1 requires the building thermal envelope to be represented on the construction documents — a cover-sheet slogan is not a section drawing.
- A Climate Zone 5 wall schedule that omits R-values is not adequate to determine compliance, even if framing size is shown; Table R402.1.3 CZ5 wood walls are R-30 or 20&5ci or 13&10ci or 0&20ci, not an assumed R-19.
- When a permit is issued, documents are stamped Reviewed for Code Compliance; one set stays with the official and the other remains on site (R103.3.1).
- R103.4 requires resubmittal of an amended set when construction changes are not in compliance with the approved documents; R103.5 retains approved documents at least 180 days from completion of the permitted work.
Why Document Adequacy Is a Scored Plans-Examiner Skill
Construction documents are 2 percent of the International Code Council (ICC) Exam 79 outline; systems documentation is another 2 percent; envelope-compliance documentation is 4 percent. Together with applicability, they decide whether a set is even reviewable. R103 does not ask you to redesign the HVAC. It asks whether the drawings and specifications contain enough information to determine 2021 International Energy Conservation Code (IECC) residential compliance.
A field inspector who arrives at a Climate Zone 5 house with no R-values on the approved wall schedule cannot verify Table R402.1.3. That failure started at plan review. Exam 79 tests both hats: the person who stamps the set and the person who later opens the walls.
R103.1 — Who Prepares What
R103.1 requires construction documents, technical reports, and other supporting data with each permit application. A registered design professional prepares them where the statutes of the jurisdiction require it. Where special conditions exist, the code official may require a design professional even if the applicant hoped to skip one. The official may waive submittal of documents not required to be prepared by a registered design professional if the nature of the work makes review unnecessary to obtain compliance — a door swap in kind is not the same as a new dwelling.
Electronic media documents are permitted where approved by the code official (R103.2). A cloud link in an email is not automatically an approved electronic submittal.
R103.2 — Information That Must Appear (as Applicable)
R103.2 requires construction documents drawn to scale on suitable material, of sufficient clarity to indicate the location, nature, and extent of the work, and showing in sufficient detail the pertinent data and features of the building, systems, and equipment governed by this code. Details include, but are not limited to, the following as applicable:
| # | 2021 R103.2 item | What 'adequate' looks like on a residential set |
|---|---|---|
| 1 | Energy compliance path | Prescriptive R401.2.1, simulated performance R401.2.2, Energy Rating Index (ERI) R401.2.3, or tropical R401.2.4 — named on the energy sheet, with the 2021 edition |
| 2 | Insulation materials and R-values | Location (cavity versus continuous), product type, and R-value for each envelope component |
| 3 | Fenestration U-factor and solar heat gain coefficient (SHGC) | Rated values on the window and door schedule, not only 'vinyl double-pane' |
| 4 | Area-weighted U-factor and SHGC calculations | Present when the design uses averaging under R402.3 |
| 5 | Mechanical system design criteria | Heating and cooling design conditions and loads; 2021 R302.1 caps heating design at 72°F maximum and cooling design at 75°F minimum |
| 6 | Mechanical and service water heating types, sizes, and efficiencies | Capacity plus AFUE, SEER, HSPF, COP, or Uniform Energy Factor as applicable |
| 7 | Equipment and system controls | Thermostats, heat-pump supplementary-heat control, and similar |
| 8 | Duct sealing, duct and pipe insulation, and location | Sealing method, R-8 / R-6 notes, attic versus inside the envelope |
| 9 | Air sealing details | Typicals that can be inspected against Table R402.4.1.1, not a generic 'seal all gaps' note |
Item 1 is how a plans examiner knows which Chapter 4 [RE] rules to apply. A set that never names the path is not adequate, even if some R-values happen to appear on a wall type. Item 4 is not optional on a Total UA or area-weighted fenestration design — without the calculation, you cannot tell whether the average meets the cap.
R103.2.1 Building thermal envelope depiction: the building's thermal envelope shall be represented on the construction documents. Chapter 2 defines that envelope as basement walls, exterior walls, floors, ceilings, roofs, and other assemblies that enclose conditioned space or separate conditioned space from exempt or unconditioned space. What reviewers look for is a continuous line on the building sections: slab edge or basement wall, above-grade walls, attic or roof, and the assemblies that separate a garage or vented crawl from conditioned rooms. A cover-sheet 'high-performance home' slogan is not R103.2.1.
Scenario: Climate Zone 5 wall schedule with no R-values
A Climate Zone 5 two-family dwelling is submitted as 'prescriptive 2021 IECC.' The wall schedule lists '2x6 wood frame, R-19 fiberglass, 1/2 in. OSB, vinyl siding' for all exterior walls and leaves the continuous-insulation column blank. Table R402.1.3 for Climate Zone 5 wood-frame walls is R-30 or 20&5ci or 13&10ci or 0&20ci. Cavity-only R-19 is not a listed option. Several sheets also omit rim-joist R-value, attic R-value (Climate Zone 5 ceiling is R-60 on the R-value table), floor R-value (R-30 in CZ5), and slab insulation (10ci, 4 ft).
The plans examiner does not mark the job approved and 'catch it at insulation inspection.' R103.2 requires insulation materials and their R-values on the documents. Missing or non-compliant R-values mean the set is not adequate to determine compliance. Issue a correction letter: name the path and edition; complete the envelope schedule including rim, attic, floors, and slab; show U-factor and SHGC on every fenestration type; show mechanical design criteria and equipment efficiencies; and draw the thermal envelope on the sections (R103.2.1).
If the same set claimed ERI or simulated performance but omitted the supporting report or the area-weighted calculations, it is equally inadequate. You cannot verify a path you cannot see. Framing size ('2x6') is not an R-value.
Examination, Stamp, Changes, and Retention
R103.3 Examination of documents: the code official examines, or causes to be examined, the accompanying construction documents and ascertains whether the construction indicated and described is in accordance with this code and other pertinent laws. The official may use a registered design professional or other approved entity not affiliated with the building design or construction to conduct that review. A peer review by the applicant's own firm is not that independent entity.
R103.3.1 Approval of construction documents: when the official issues a permit, the construction documents shall be endorsed in writing and stamped Reviewed for Code Compliance. One set stays with the official. The other set returns to the applicant, shall be kept at the site of work, and shall be open to inspection by the official or an authorized representative. A superintendent's unmarked working set in the truck is not the approved set.
R103.3.2 Previous approvals: this code shall not require changes in the construction documents, construction, or designated occupancy of a structure for which a lawful permit has already been issued or otherwise lawfully authorized, and the construction of which has been pursued in good faith within 180 days after the effective date of this code and has not been abandoned. That is a vested-permit rule, not a free pass to ignore energy on a new application filed after adoption.
R103.3.3 Phased approval: the official may issue a permit for construction of part of an energy conservation system before the construction documents for the entire system have been submitted or approved, provided adequate information and detailed statements have been filed. The holder proceeds at their own risk without assurance that the permit for the entire system will be granted. Phased footing-and-foundation energy details still need enough slab-edge insulation information if that work is in the phase.
R103.4 Amended construction documents: changes made during construction that are not in compliance with the approved construction documents shall be resubmitted for approval as an amended set. A silent field change from R-60 attic to a thinner blown-in layer is not 'the inspector's problem only.'
R103.5 Retention of construction documents: one set of approved construction documents shall be retained by the code official for a period of not less than 180 days from date of completion of the permitted work, or as required by state or local laws.
Scenario: jobsite set versus the stamped set
An inspector arrives at a Climate Zone 5 house. The jobsite copy shows attic 'R-49 blown,' but the set stamped Reviewed for Code Compliance shows R-60. That is an R103.4 amendment situation, not a hallway negotiation. Whether R-49 uncompressed over 100 percent of the ceiling, including above exterior wall top plates, can satisfy an R-60 requirement is an R402.2.1 raised-heel trade taught in a later chapter. Even if that trade is available, it must appear on approved (or timely amended) documents. The inspector's first move is still: the work does not match the approved set.
Adequacy Checklist Before You Calculate Anything
Tab this list on your R103 page:
- Is this a residential building or residential portion (Section 1.2)?
- Is the 2021 energy compliance path named?
- Can you find every envelope R-value and every fenestration U-factor and SHGC?
- Is the thermal envelope drawn (R103.2.1)?
- Are mechanical design criteria, equipment type/size/efficiency, controls, duct sealing/insulation/location, and air-sealing details present?
- If performance, Total UA, or ERI is claimed, are the supporting calculations in the submittal?
If any answer is no, the correct Exam 79 action is documents inadequate to determine compliance — not 'approve and catch it at insulation inspection.'
Construction documents for a Climate Zone 5 dwelling list 2x6 walls but omit insulation R-values. The energy path is marked prescriptive 2021 IECC. What should the plans examiner do?
Which statement matches 2021 IECC R103.2.1?
During construction, the contractor installs attic insulation that does not match the set stamped Reviewed for Code Compliance. What does R103.4 require when that change is not in compliance with the approved documents?