29.1 N - NOISE IMPACT

29.1.1 Purpose. The purpose of these provisions is to establish regulations to maintain, within single family and multifamily structures and within structures designed for transient habitation, low exposure levels to noise associated with airports and major roads.

29.1.2 Applicability. The Noise Impact Regulations shall apply to lands designated “N” on the Zoning Maps that are located within areas mapped by the General Plan to have a noise exposure level of equal to or in excess of 60 dB Community Noise Equivalent Level - Day-Night Average Level (CNEL-Ldn).

The provisions of the Noise Impact

Regulations shall apply in addition to regulations imposed by the principal zone, development regulations, and other special area combining regulations.

29.1.4 Prohibited Development. Within areas above the 60 dB CNEL-Ldn level, placement of manufactured homes is prohibited unless they have been certified to limit interior noise levels to 45 dB CNEL-Ldn in all habitable rooms.

29.1.5 Building Standards to Reduce Interior Noise Levels Required. Building standards to reduce interior noise levels are required to limit noise levels to 45 dB CNEL-Ldn in all habitable rooms. New construction of single

The Humboldt County Code is current through Ordinance 2784, passed March 10, 2026.

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Title III Land Use and Development | Humboldt County Code

family and multifamily structures and structures designed for transient habitation shall conform to the applicable requirements of the Humboldt County Building Code. (Ord. 2285, § 3, 12/10/2002)

314-30 “O” Combining Zone Designations

(Section Reserved for Future Use)

314-31 “P” Combining Zone Designations