18-11 OPEN SPACE (O) ZONE.

a. The O Zone generally will be applied to areas which are most suitable for open space uses because of topography, geology, vegetation, soils, wildlife habitat, scenic prominence, agricultural value or flood hazard.

b. The O Zone is intended to prevent exposure of urban development to unacceptable risks posed by natural hazards and to protect natural resources from disruptive alterations. To these ends, it is further intended to prevent the subdivision of such lands.

c. It will be applied as a permanent zone to areas designated “open space” or “park” on the Clearlake General Plan Land Use Map. (Ord. #271-2025, S2 (Exh. A))

The Clearlake Municipal Code is current through Ordinance 286-2026, passed April 2, 2026.

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Ch. XVIII Zoning Regulations | Clearlake Municipal Code

The property development standards for the O Zone are as follows:

• a. Maximum density: no maximum density required.

• b. Yards.

  1. Front: thirty-five (35') feet;

  2. Side: fifteen (15') feet except on a corner lot where the street side yard shall have a setback of thirty (30') feet.

  3. Rear: twenty (20') feet; except as otherwise specified there shall be no rear yard setback on properties which abut Clear Lake or Cache Creek.

• c. Minimum Lot Area.

  1. Federal or State lands: forty (40) acres.

  2. City, county, or other special district or government owned lands: five thousand (5,000) square feet.

  3. Privately owned lands: existing parcel size at time of reclassification to this zone. (Ord. #271-2025, S2

  • (Exh. A))