Lyon County staff propose adopting 2024 building, plumbing, mechanical and electrical codes with local amendments

Lyon County community development staff presented a proposal Thursday to adopt the 2024 International Code Council building codes, the 2023 National Electrical Code, the 2024 uniform mechanical and plumbing codes, the 2024 Northern Nevada ICC amendments and a set of Lyon County amendments, with an effective date proposed of Jan. 1, 2026.

The proposal, presented by Gavin Anderson, Lyon County Community Development Director, said the updates align local regulations with national model codes that are revised on a three‑year cycle and that the changes are intended to improve construction safety, energy efficiency and resilience. Anderson said Northern Nevada jurisdictions collaborated on regional amendments addressing seismic design, snow loads, wind speeds and rural‑urban interface concerns.

Why it matters: Anderson told the board the 2024 codes update is intended to reflect “advancements in construction, safety, and sustainability,” and to keep Lyon County aligned with regional and national standards. The proposal includes county‑specific amendments the staff say preserve local seismic design requirements and add some fire‑resistance and electrical safety provisions.

Key technical changes and local amendments described by staff included tighter building envelope testing options, automatic lighting shutoff controls in new single‑family homes, a residential energy point system offering multiple compliance pathways, clarified early‑testing requirements for air leakage, revised prescriptive pathways for snow loads, and changes to where fire sprinklers are required in single‑family and townhome occupancies. Anderson also described Lyon County amendments proposing higher fire‑resistance gypsum on garage walls/ceilings, maintaining a seismic design category D2 for prescriptive residential designs, and a requirement that certain residential projects using prescriptive methods comply with the county’s seismic designation.

Ray Brown, building examiner and acting building official, answered technical questions about the air‑leakage testing changes and said the new language clarifies alternative ways to meet the existing limit (no more than five air exchanges per hour), rather than imposing a different leakage limit.

Cost and permit fees: Staff summarized independent cost studies and local contractor input estimating a modest net construction cost increase from the code changes: a cited study estimated a 1.37% net increase across building types; a separate National Association of Home Builders analysis for a 2,000‑square‑foot single‑family home in Lyon County’s climate zone (CZ‑5) estimated a 1.6–1.8% increase, modeled at roughly $6,400–$7,200 on a $400,000 baseline. Staff also showed how the county’s updated valuation table would raise construction valuation figures and, with the example used, could increase building permit fees in the example by about $654 (roughly a 29% increase for that permit type), because the underlying valuation per square foot used for fee calculations shifts upward.

Staff recommended this first hearing be followed by a second hearing in August and an effective date of Jan. 1, 2026, with a grace period allowing applications under the 2018 codes through Dec. 31, 2025. Anderson said the Northern Nevada amendments process began in 2023, involved technical committees and stakeholders, and was approved by the Northern Nevada ICC on Feb. 20, 2025.

Public comment and board questions: Henry Campbell of the public testified that the proposed changes (for example, requirements for slab vs. crawlspace foundations) could add $10,000–$11,000 to the cost of a home and, combined with fee increases, “seems like you’re hitting the homeowner pretty hard.” Board members asked staff for clarifications on specific provisions (for example, the proposed requirement for receptacles in island countertops, the five‑eighths‑inch Type X gypsum on garage separations, surge protection at main service panels, and the county’s seismic designation). Staff explained the island‑countertop change is intended to reduce the later use of unsafe extension cords and uninspected “future‑wiring” junctions; staff said prior analyses indicated removing the receptacle option led to more unsafe extension‑cord use. For the garage gypsum change staff said the material cost impact is estimated at $800–$1,200 in material cost for a typical garage ceiling.

Board action and next steps: The item was presented as a proposal. Commissioner Hendricks moved to propose the ordinance adopting the 2024 codes and county amendments; the motion to propose the ordinance was made on the record and will return for the required noticed hearing (minimum notice period under NRS) and for final action at a later date. Staff said the formal adoption would be returned to the board in August for continued consideration and that the effective date staff recommends is Jan. 1, 2026, with a grace period through Dec. 31, 2025, for plans submitted under the 2018 codes.

The board and staff emphasized that the fire code, public works design manual (infrastructure standards) and title 15 zoning regulations are not changed by this ordinance; those remain under separate authorities and local fire protection districts for life‑safety fire apparatus access and related measures.

The staff packet and the Northern Nevada amendment package are publicly posted; staff said no stakeholder comments were received during a 15‑business‑day comment period that closed June 20, 2025. The board did not take final adoption action Thursday; the item will return for the required noticed hearing before final adoption.