Short-term rental guests in unincorporated Orange County must observe quiet hours under Zoning Code Section 7-9-93, which incorporates the County Noise Control Ordinance (Section 4-6-5). Continuous exterior noise is capped at 55 decibels from 7 a.m. to 10 p.m. and 50 decibels from 10 p.m. to 7 a.m. in residential areas.
Section 7-9-93(e) imposes 'Quiet Hours' on short-term rentals by tying them to the County's existing noise standard. The text reads: 'Pursuant to the County of Orange Noise Control Ordinance (section 4-6-5), occupants shall comply with the exterior noise standards by prohibiting continuous noise higher than fifty-five (55) decibels from 7:00 a.m. to 10:00 p.m. and fifty (50) decibels from 10:00 p.m. to 7:00 a.m. in all residential property.' This means the same decibel limits that apply to any residential property in unincorporated Orange County are made an explicit condition of the STR permit. The noise terms must be disclosed to guests: Section 7-9-93(e)(12) requires the lease and the posted in-unit notice to state that occupants may be cited or fined by the County and/or immediately evicted by the property owner for violating any applicable regulations, including quiet hours. The lease and posting must also list a property owner or designee phone number reachable at all times, so neighbors and guests can report disturbances. Controlling noise is one of the stated purposes of the ordinance, alongside traffic and parking impacts.
Continuous exterior noise above 55 dB (daytime) or 50 dB (nighttime) in residential areas violates the Noise Control Ordinance (Sec. 4-6-5) as incorporated into the STR permit. Guests may be cited or fined and immediately evicted; repeated violations can suspend the permit.
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