HB 313 updates Utah’s State Construction Code by adopting newer editions of key model codes and revising a wide range of residential and electrical standards. The bill moves Utah’s incorporated National Electrical Code reference from the 2020 edition to the 2023 edition, keeps the 2021 International Residential Code as the base, and makes numerous state-specific amendments to those codes. It also includes a coordination clause to ensure its changes to Section 15A-3-202 control over conflicting changes in H.B. 175 if both bills become law.
The bill makes targeted changes affecting home construction, inspections, safety devices, and building design. Among other things, it revises stair, handrail, egress, foundation, insulation, ventilation, receptacle, and disconnect requirements; adds or updates definitions for accessory dwelling units, energy storage systems, backflow testing, and dual-source water connections; and updates snow load tables and related structural provisions. It also modifies rules for blended assisted living facilities, accessory dwelling units, and certain fire-resistance and egress standards, while removing or relaxing some requirements such as certain AFCI provisions, some inspection-related rules, and some water-heater regulations in areas outside ozone or PM2.5 nonattainment zones.
The bill’s impact on state law is broad but technical: it amends multiple sections of Title 15A governing the State Construction Code and one section of Title 19 governing water heater emissions. In practice, it changes what builders, designers, inspectors, manufacturers, and local building officials must follow for residential construction and electrical installations statewide, while preserving some local flexibility through existing amendment mechanisms. It also creates a special effective date of July 1, 2025, so the new standards apply beginning then.
Overall sentiment appears strongly favorable. The bill passed the House and Senate with large margins, including unanimous or near-unanimous committee recommendations and a 69-0 House third-reading vote. The final House concurrence in the Senate amendment also passed comfortably, though with some dissent, suggesting broad support for updating construction standards even if not every provision was universally accepted.
The main points of contention appear to center on the scope of code changes and the balance between safety, affordability, and regulatory burden. Provisions that relax or delete certain electrical and inspection requirements, adjust receptacle and AFCI rules, and alter water-heater restrictions may have drawn concern from those prioritizing stricter safety or environmental standards. At the same time, provisions expanding flexibility for accessory dwelling units, triplexes/fourplexes, and certain construction methods likely appealed to housing and industry interests seeking lower costs and easier compliance. The coordination clause with H.B. 175 also indicates an effort to resolve overlap between related housing and construction bills.
HB 313 amends multiple sections of Utah’s State Construction Code in Title 15A and one air-quality-related water-heater provision in Title 19. It updates the state’s incorporated model codes to the 2023 National Electrical Code and retains the 2021 International Residential Code, while making numerous Utah-specific modifications that affect residential construction, electrical work, fire safety, egress, insulation, structural design, accessory dwelling units, assisted living facilities, and energy storage systems. It also narrows or removes some existing requirements and exempts certain water heaters outside nonattainment areas, changing compliance obligations for builders, manufacturers, inspectors, and local building officials statewide beginning July 1, 2025.
The bill appears to have enjoyed broad bipartisan support and little visible opposition in committee, passing House and Senate committee votes unanimously and clearing the House 69-0 on third reading. It later passed the Senate with a strong majority and the House concurred in the Senate amendment with a solid margin, though not unanimously. The voting pattern suggests general agreement that the code updates were needed, even if some members had reservations about specific provisions.
The most likely areas of contention are the bill’s mix of safety-related updates and regulatory rollbacks. Supporters of stricter building and electrical safety may object to deletions or relaxations involving AFCI requirements, certain inspections, receptacle rules, and other code provisions. Others may have concerns about the water-heater emissions carveout for areas outside ozone and PM2.5 nonattainment zones. On the other hand, housing and construction stakeholders likely supported the bill’s flexibility for accessory dwelling units, triplexes/fourplexes, and streamlined compliance. The coordination clause with H.B. 175 suggests lawmakers were also managing overlap between related housing bills to avoid conflicting amendments.