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Nevada County adopts 2025 California building code; supervisors hear concerns about higher snow loads and affordability
Summary
The Board of Supervisors voted to adopt the 2025 California Building Standards Code (Title 14 amendment) effective Jan. 1, 2026. Staff briefed the board on AB 130, a six‑year moratorium on new residential amendments, higher snow‑load calculations that could raise construction costs, and a new Wildland‑Urban Interface code applying to new construction.
Nevada County supervisors unanimously adopted an ordinance on Dec. 16 amending Title 14 to adopt the 2025 California Building Standards Code, including the new Wildland‑Urban Interface (WUI) requirements and updated snow‑load standards.
Nick McBurney, supervising plans examiner, told the board the state’s 2025 code cycle includes three items of particular local interest: Assembly Bill 130 (which imposes a six‑year moratorium on new or changed residential building code amendments and grants a 10‑year approval window for existing master/model plans), new snow‑load standards based on ASCE 7‑22 (which staff said will increase residential snow‑load values about 50% and commercial loads by roughly 100%), and a consolidated WUI code (Title 24, Part 7) to strengthen fire‑resistant standards for new construction.
Staff said the increased snow loads will likely raise construction costs because footings, rafters and beams will require larger sizes or engineered design at lower elevations — the prescriptive no‑engineer threshold drops from roughly 3,000 to 2,500 feet — and that property owners and builders should expect more projects to require engineering. McBurney said WUI standards apply to new construction only and not to renovations or additions. He also noted that the county’s four affordable master plans are grandfathered under AB 130, saving both time and expense for projects that use those master plans.
Supervisors asked for clearer public communications and outreach to contractors and property owners, and expressed concern about tradeoffs between safety standards and housing affordability. Several board members asked staff to provide more detail on how the snow‑load changes will apply to the county’s affordable master plans and to prepare outreach materials explaining impacts for residents and small builders.
The board adopted the ordinance by roll call; staff said they will present follow‑up clarifications and community outreach plans to explain the changes before the code becomes effective on Jan. 1, 2026.
