What extra rules apply to a hillside lot in Thousand Oaks?

Thousand Oaks's code: No grading except under a hillside planned development permit. (Land with slopes of 25% or more.) (§ 9-4.3106); At least 32.5% of the site must stay natural, with no cut or fill, or be used only for recreation. (Hillside sites with an average slope of 0.0% to 14.9%.) (§ 9-4.3106).

Building on a hillside in Thousand Oaks: the local rules

Thousand Oaks code What Thousand Oaks's code adds
Soils or geology report	A certified soil report and geological report from a state-registered civil engineer or geologist. Applies: Applications for a hillside plan development permit. § 9-4.3110 · code text The application shall also include grading, phasing, the sequence of construction, and a certified soil report and geological report from a civil engineer or geologist registered with the State.
Grading and retaining walls	No grading except under a hillside planned development permit. Applies: Land with slopes of 25% or more. § 9-4.3106 · code text Land with twenty-five (25%) percent or greater slope shall not be graded except pursuant to an H-P-D permit only where it can be shown that a minimum amount of development is in the spirit of, and compatible with, the purposes and policies set forth in this article. At least 32.5% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 0.0% to 14.9%. § 9-4.3106 · code text 0.0–14.9% \| 32.5% At least 40.0% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 15.0% to 17.4%. § 9-4.3106 · code text 15.0–17.4% \| 40.0% At least 47.5% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 17.5% to 19.9%. § 9-4.3106 · code text 17.5–19.9% \| 47.5% At least 55.0% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 20.0% to 22.4%. § 9-4.3106 · code text 20.0–22.4% \| 55.0% At least 62.5% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 22.5% to 24.9%. § 9-4.3106 · code text 22.5–24.9% \| 62.5% At least 70.0% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 25.0% to 27.4%. § 9-4.3106 · code text 25.0–27.4% \| 70.0% At least 77.5% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 27.5% to 29.9%. § 9-4.3106 · code text 27.5–29.9% \| 77.5% At least 85.0% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 30.0% to 32.4%. § 9-4.3106 · code text 30.0–32.4% \| 85.0% At least 92.5% of the site must stay natural, with no cut or fill, or be used only for recreation. Applies: Hillside sites with an average slope of 32.5% to 34.9%. § 9-4.3106 · code text 32.5–34.9% \| 92.5% 100% of the site must stay natural or recreational, except minimum grading for the home and driveway. Applies: Hillside sites with an average slope of 35.0% or more. § 9-4.3106 · code text 35.0 and above % \| 100.00% (except minimum grading for dwelling and driveway areas)

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