17-31 BUILDINGS AND STRUCTURES.

Applications for building and structures within the scope of the building code that are proposed in flood hazard areas shall comply with the applicable requirements of the building code. (Ord. #256-2021, S2 (301-1))

Detached garages and accessory storage structures used only for parking or storage are permitted below the base flood elevation provided the garages and accessory storage structures:

• a. Are one (1) story and not larger than six hundred (600) square feet in area when located in special flood hazard areas.

• b. Are anchored to resist flotation, collapse or lateral movement resulting from flood loads.

• c. Have flood openings in accordance with the building code.

• d. Have flood damage-resistant materials used below the base flood elevation.

e. Have mechanical, plumbing and electrical systems, including plumbing fixtures, elevated to or above the base flood elevation. (Ord. #256-2021, S2 (301-2))

Utility and miscellaneous Group U includes buildings that are accessory in character and miscellaneous structures not classified in any specific occupancy in the building code, including, but not limited to, agricultural buildings, aircraft hangars (accessory to a one (1) or two (2) family residence), barns, carports, fences more than six (6') feet one thousand eight hundred twenty-nine (1,829) mm) high, grain silos (accessory to a residential occupancy), greenhouses, livestock shelters, private garages, retaining walls, sheds, stables, and towers. In addition to the building code requirements for fire and life safety, the following shall apply to utility and miscellaneous Group U buildings and structures in flood hazard areas:

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

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Ch. XVII, Art. III Flood Resistant Development | Clearlake Municipal Code

a. New construction and substantial improvement of such buildings and structures shall be anchored to prevent flotation, collapse or lateral movement resulting from flood loads, including the effects of buoyancy, during conditions of the design flood.

b. New construction and substantial improvement of such buildings and structures, when fully enclosed by walls, shall be elevated such that the lowest floor, including basement, is elevated to or above the design flood elevation in accordance with ASCE 24 or shall be dry floodproofed in accordance with ASCE 24.

c. Unless dry floodproofed, fully enclosed areas below the design flood elevation shall be constructed in accordance with ASCE 24 and limited to parking, storage, and building access.

• d. When fully enclosed by walls, flood openings shall be installed in accordance with ASCE 24.

• e. Flood damage-resistant materials shall be used below the design flood elevation.

• f. Mechanical, plumbing and electrical systems, including plumbing fixtures, shall be located or installed in accordance with ASCE 24. (Ord. #256-2021, S2 (301-3))