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Chapter 4 — ZONING

Article 36 — Open Space Zone (OS)

Thousand Oaks Zoning Code · 2026-06 edition · updated 2026-07-07 · Thousand Oaks

Sec. 9-4.3600. Purposes (OS).

The open Space Zone (OS) is established for the following purposes and in order to comply with Government Code Sections 65560–65570, 65910 and 65911:

(a) To ensure that the use of property as natural open space is related to the purposes and policies of the Land Use Element, Conservation Element and Open Space Element of the General Plan; and

(b) To recognize and identify the intrinsic ecological value, scenic and/or undisturbed nature of particular private parcels of land; and

(c) Adopt an action plan as required by Government Code 65564 to provide standards and guidelines for their continued use and preservation; and

(d) To ensure that any proposed structures and improvements in the zone will be compatible with surrounding zones and uses and will have minimal impact on the natural, undisturbed character of the land.

The requirements of the OS Zone are intended to apply to publicly owned property, property planned for public ownership, and certain private property within the OS Zone. It is not intended to imply present or future public ownership of land within the Open Space Zone.

(§ I, Ord. 1108-NS, eff. June 20, 1991)

Sec. 9-4.3601. Permitted uses (OS).

Only the uses identified in Article 21 of this chapter as being permitted in the Open Space (OS) Zone shall be established or maintained on property located therein, subject to the permitting requirements and limitations set forth in said Article 21.

(§ I, Ord. 1108-NS, eff. June 20, 1991 as amended by § 44, Ord. 1178-NS, eff. April 27, 1993, and § 50, Ord. 1620NS, eff. August 12, 2016)

Sec. 9-4.3602. Reserved.

(§ I, Ord. 1108-NS, eff. June 20, 1991, § 10, Ord. 1306-NS, eff. November 20, 1997, § 21, Ord. 1555-NS, eff. May 13, 2011, and repealed by § 51, Ord. 1620-NS, eff. August 12, 2016)

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Contents — Thousand Oaks Zoning Code
Thousand Oaks Zoning Code
  1. Chapter 1 — FLOOD CONTROL
  2. Chapter 2 — GENERAL PLAN AND SPECIFIC PLANS
  3. Chapter 3 — SUBDIVISIONS
  4. Chapter 4 — ZONING
    Overview
    1. Article 1 — Title, Purpose, and Interpretation
    2. Article 2 — Definitions
    3. Article 3 — Establishment and Designation of Zones
    4. Article 4 — Rural-Agricultural Zones (R-A)
    5. Article 5 — Rural-Exclusive Zones (R-E)
    6. Article 6 — Single-Family Estate Zones (R-O)
    7. Article 7 — Single-Family Residential Zones (R-1)
    8. Article 8 — Two-Family Residential Zones (R-2)
    9. Article 9 — Residential Planned Development Zones (R-P-D)
    10. Article 10 — Multiple-Family Residential Zones (R-3)
    11. Article 10.5 — Mixed-Use (MU) and Mixed-Use Overlay (MUOZ) Zones
    12. Article 11 — Commercial Office Zones (C-O)
    13. Article 12 — Neighborhood Shopping Center Zones (C-1)
    14. Article 13 — Highway and Arterial Business Zones (C-2)
    15. Article 14 — Community Shopping Center Zones (C-3)
    16. Article 15 — Regional Shopping Center Zones (C-4)
    17. Article 16 — Industrial Park Zones (M-1)
    18. Article 17 — Light Manufacturing Zones (M-2)
    19. Article 18 — Design Review: Requirements and Procedure
    20. Article 19 — Condominium Conversions, Mobile Home Park Subdivi…
    21. Article 20 — Mobile Home Park Development Zones
    22. Article 21 — Uses Allowed by Zone
    23. Article 22 — Objective Design Standards for Residential Develo…
    24. Article 23 — Sign Regulations
    25. Article 24 — Off-Street Parking
    26. Article 25 — Height, Yard, Area, and Building Conditions and E…
    27. Article 26 — Community Park and Recreational Facilities
    28. Article 27 — Nonconforming Buildings and Uses
    29. Article 28 — Variances and Permits
    30. Article 29 — Amendments
    31. Article 30 — Enforcement, Violations, and Penalties
    32. Article 31 — Hillside Planned Development Zones (H-P-D)
    33. Article 32 — Public, Quasi-Public, and Institutional Lands and…
    34. Article 33 — Height Limit Overlay Zone (H)
    35. Article 34 — Historic Landmark Overlay Zone (HL)
    36. Article 35 — Protected Ridgeline Overlay Zone Regulations (PR)
    37. Article 36 — Open Space Zone (OS)
    38. Article 37 — Urban Lot Splits and Two-Unit Housing Developments
    39. Article 38 — Special Use Permit For Rental of Dwelling
    40. Article 39 — Highway and Arterial Business/Auto Mall Zone (C-2…
    41. Article 40 — Transportation Demand Management (TDM) Standards …
    42. Article 41 — Temporary Uses
    43. Article 42 — Oak Tree Preservation and Protection
    44. Article 43 — Landmark Tree Preservation and Protection
    45. Article 44 — Wireless Communications Facilities
    46. Article 45 — Accessory Dwelling Units
  5. Chapter 5 — ENVIRONMENTAL IMPACT ASSESSMENT AND ENVIRONMENTAL …
  6. Chapter 6 — LIABILITY FOR ANNEXATION FEES
  7. Chapter 7 — EXEMPTED CHARGES FOR LOW INCOME SENIOR CITIZEN HOU…
  8. Chapter 8 — DEDICATION OF LAND AND/OR PAYMENT OF IN-LIEU FEES …
  9. Chapter 9 — TIME LIMITATIONS FOR JUDICIAL REVIEWS OF CITY DECI…
  10. Chapter 10 — AFFORDABLE HOUSING
  11. Chapter 11 — DEVELOPMENT AGREEMENTS
  12. Chapter 12 — PUBLIC HEARING AND ENVIRONMENTAL REVIEW NOTICE RE…
  13. Chapter 13 — DISPOSITION OR LEASE OF PROPERTY HELD BY THE CITY…

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