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Building Code Changes for 2025

A summary of the most impactful 2024 I-Code updates being adopted by jurisdictions during the 2025 cycle

The 2024 Edition Code Cycle

The 2024 editions of the International Code Council family of codes (IBC, IFC, IRC, IPC, IMC, IECC, IFGC, and others) published in late 2023 and are now being adopted by jurisdictions across the United States during 2025 and 2026. Most adoptions take 12 to 24 months from publication. This guide summarizes the highest-impact changes for commercial construction drawing review and design teams.

Always verify local adoption

Each jurisdiction adopts code editions on its own schedule and almost always amends specific sections. Confirm with the AHJ which edition is in force and which local amendments apply before relying on any national change summary.

IBC 2024, Structural Provisions

  • Tall mass timber (Types IV-A, IV-B, IV-C) provisions further refined, including additional protected concealed spaces and connection details
  • Updated seismic design coefficients in Chapter 16 reflecting ASCE 7-22
  • Snow load provisions reorganized to align with ASCE 7-22
  • Refined live load requirements for stadiums, dining halls, and assembly occupancies
  • Updated provisions for special inspections on mass timber and mass plywood

IBC 2024, Egress and Accessibility

  • Expanded provisions for accessible means of egress to align with the latest ICC A117.1
  • Updated stairway requirements including expanded use of alternating tread devices in limited applications
  • Refined door swing requirements for high-occupancy rooms
  • New provisions addressing lactation rooms in certain occupancies

IFC 2024, Fire Protection

  • Lithium-ion battery and energy storage system (ESS) provisions significantly expanded, installation, spacing, ventilation, hazard mitigation
  • Updated NFPA 13 reference edition for sprinkler systems
  • Refined provisions for high-piled storage
  • EV charging station fire-protection requirements in parking structures
  • New chapters or sections for cannabis processing facilities in some adoptions

IECC 2024, Energy

Commercial Provisions

Stricter envelope U-values, improved HVAC equipment efficiency requirements, expanded requirements for demand-controlled ventilation, refined daylighting and lighting power density limits.

EV Readiness

Expanded EV charging readiness requirements at non-residential buildings, increased mandatory EV-ready and EV-capable parking space percentages.

On-Site Renewables

Some jurisdictions adopting solar-ready or solar-required provisions for new commercial construction.

Heat Pumps

Pathways and credits favoring electric heat pump space and water heating in compliance pathways.

IMC and IPC 2024, Mechanical and Plumbing

  • Updated ventilation rate tables aligning with ASHRAE 62.1-2022
  • Refined exhaust requirements for commercial kitchens and parking garages
  • Refrigerant safety provisions updated for low-GWP refrigerants (A2L classifications)
  • Refined drinking fountain provisions including bottle filler integration
  • Updated rainwater and graywater reuse provisions

NEC 2023, Electrical

The NEC publishes on a separate cycle from the I-Codes. The 2023 NEC introduced significant changes that are now being adopted alongside 2024 I-Code packages:

  • Expanded GFCI requirements in additional dwelling unit and commercial locations
  • Expanded AFCI requirements
  • EV supply equipment provisions clarified for load management and panel calculations
  • Energy storage system (ESS) installation requirements refined in Article 706
  • Microgrid and DC microgrid provisions
  • Working clearance refinements at switchboards and panelboards

What This Means for Drawing Review

  • Verify the code summary sheet references the correct adopted edition
  • Confirm ASCE 7-22 was used for structural calculations where required
  • Check that envelope U-values reflect 2024 IECC if adopted
  • Verify ESS / lithium-ion installations meet expanded provisions
  • Confirm ventilation rates use 2022 ASHRAE 62.1
  • Check NEC working clearances against the 2023 edition values
  • Coordinate EV-ready parking counts with project parking schedule

Keep exploring

Related references for code compliance and review.

IBC Occupancy Classification

Occupancy types and their code-driven requirements.

ASHRAE 90.1 Energy Compliance Basics

Minimum energy performance standards for commercial buildings.

ADA Accessibility Quick-Reference

Required clearances, slopes, and turning radii.

AI Building Code Review

How AI checks drawings against IBC, NFPA, ADA, ASHRAE, and NEC.

Stay current on code changes

Helonic checks your drawings against the adopted IBC, IFC, IECC, IMC, IPC, and NEC editions plus jurisdictional amendments, surfacing the items affected by every cycle update. Book a demo and we'll walk through it on your set.