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Title 19 — Development Code

§ 19.26

Twentynine Palms Zoning Code · 2026-06 edition · updated 2026-07-25 · Twentynine Palms

19.26.040 - Safety - Geological Overlay District (S-G)

A.

Intent and Purpose. The S-G Overlay is created to provide greater public safety by establishing review procedures and setbacks for areas that are subject to such potential geologic problems as ground shaking, earthquake faults, liquefaction and subsidence.

B.

Locational Requirements.

1.

The S-G Overlay shall apply to designated areas which are on or adjacent to active earthquake fault traces. The S-G Overlay shall implement the requirements of the Alquist-Priolo Special Studies Zones Act of 1972.

2.

The S-G Overlay District shall be designated in areas where landslides or subsidence are prevalent.

3.

The S-G Overlay District shall be designated in areas where liquefaction of the soil is associated with earthquake activity.

C.

Development Standards. When a land use is proposed within an S-G Overlay District, the following standards shall apply:

1.

Development of all structures used for human occupancy shall take place a minimum of 50 feet or farther from any active earthquake fault traces. Active fault traces are those delineated on the current Alquist-

Priolo Earthquake Fault Zone Maps or on maps in the City General Plan.

2.

Development of all structures used for critical facilities shall take place 150 feet or farther from any active earthquake fault trace as indicated in the City General Plan. Critical facilities shall include dams, reservoirs, fuel storage facilities, power plants, nuclear reactors, police and fire stations, schools, hospitals, rest homes, nursing homes and emergency communications facilities.

3.

The following conditions may apply to areas subject to periodic landslides, subsidence and soil liquefaction as may be indicated on applicable resource maps:

a.

Siting. All facilities and streets should be sited so as to minimize the erosion potential.

b.

Vegetation. Natural vegetation shall be retained and protected where possible. Where inadequate vegetation exists, additional landscaping shall be provided. Any additional landscaping shall be compatible with the local environment and capable of surviving with a minimum of maintenance and supplemental water.

c.

Exposure of Bare Land. When land is exposed during development, only the smallest practicable land portion, as an increment of a development project, shall be exposed at any one time; the duration of time that the exposure remains unprotected shall be the shortest practical time period and such exposure should be protected with temporary vegetation or mulching where practical.

d.

Runoff. The development should be designed to minimize water runoff. Provisions should be made to effectively accommodate any increased runoff.

e.

Special Measures. Measures shall be taken to offset the possible effects of landslides. A detailed geologic report identifying these measures shall be required prior to the issuance of building permits.

f.

All proposed facilities located within liquefaction and landslide hazard areas shall be constructed in a manner to minimize or eliminate subsidence damage.

D.

Conflicting Provisions. In the event any development standards in this overlay district conflict with the development standards of the land use/zoning district over which the overlay district is mapped, the more restrictive provisions shall apply.

19.26.050 - Mobile Home - Tourist Commercial District (MH-CT)

A.

Intent and Purpose. The intent and purpose of this overlay is to provide flexible land development, while maintaining other community goals and priorities, by permitting and regulating the establishment of mobile home parks in certain areas zoned Tourist Commercial.

B.

Locational Requirements.

1.

The MH-CT Overlay may be applied to areas zoned Tourist Commercial (CT), as determined by the City. Mobile home parks may operate in the MH-CT Overlay District after the granting of all necessary entitlements by, including but not limited to, the City and the California Department of Housing and Community Development (HCD).

2.

The MH-CT Overlay shall be depicted on the General Plan Land Use Map as currently shown or as may be amended. The MH-CT Overlay may also be separately depicted on an overlay map.

C.

Development Standards. To the extent permitted by law, MH-CT Overlay applicants must provide the City with proof of compliance with all development standards identified herein. The following standards shall apply to all mobile home parks established in an MH-CT Overlay District:

1.

The construction and development of mobile home parks shall comply with the following standards, regulations and conditions, where applicable:

a.

Conditions of approval imposed in accordance with any approved permit issued by the City.

b.

The Mobile Home Park Act, California Health and Safety Code Section 18200 et seq., the Mobile Home Residency Law, California Civil Code Section 798 et seq., and California Code of Regulations, Title 25, Division 1, Chapter 2, Housing and Community Development Mobile Home Park and Installations Regulations.

c.

The National Manufactured Housing Construction and Safety Standards Act of 1974 and relevant regulations in Title 24 of the Code of Federal Regulations.

d.

Requirements of state, county and local agencies including, but not limited to, County Division of Environmental Health Services, City Engineering, Office of the State Fire Marshal, Twentynine Palms Water District, and HCD.

e.

Chapter 19.124 (Mobile Home and Special Occupancy Parks) of the City's Development Code.

2.

Mobile home parks shall not exceed a density of 12 dwelling units per gross acre.

3.

Pursuant to Government Code Sections 65995, 65996 and 66000 et seq., and Education Code Sections 17620 through 17626, all owners of mobile home parks shall pay appropriate development and school impact fees at the time HCD inspects the installation of units at a mobile home park.

D.

Conflicting Provisions. In the event any development standards in this overlay district conflict with the development standards of the land use/zoning district over which the overlay district is mapped, the provisions of this overlay district shall apply. In the event any City-issued Conditional Use Permit or variance conflicts with these development standards, the provisions of the City-issued Conditional Use Permit or variance shall govern.

19.26.060 - Planned Development Overlay District (PD)

A.

Intent and Purpose. The Planned Development (PD) Overlay designates property where special consideration of the site and surroundings are necessary to allow creative development solutions that do not meet the allowed use regulations and/or development standards of the primary land use/zoning district. The PD Overlay is intended to allow modification of requirements established by other ordinances and diversification in the relationship of different uses, buildings, structures, lot sizes and open spaces, while ensuring compliance with and implementation of the General Plan.

B.

Locational Requirements. The PD Overlay may be applied to any area in the City that is a minimum of 1 acre in size.

C.

Development Standards. The development standards allowed in the PD Overlay District shall be consistent with the General Plan land use designation and description. The development standards may deviate from the development standards of the primary land use/zoning district where required findings for PD Overlay approval are made by the designated approving authority pursuant to Chapter 19.43 (Planned Development).

D.

Conflicting Provisions. In the event there is an inconsistency or conflict between an adopted PD Overlay and comparable provisions of this Title, the overlay district standards shall prevail.

E.

Special Requirements.

1.

Rezoning and Plan Approval Required. Any application to rezone property to the PD Overlay District shall also require the submittal of a Conditional Use Permit for a planned development application detailing site and building plans and uses as required in Chapter 19.43 (Planned Development). Chapter 19.43 establishes the process, procedures, findings, conditions and amendment provisions for planned development approval.

2.

Allowed Land Uses and Permit Requirements. The land uses allowed in the PD Overlay District shall be consistent with the General Plan land use designation and description. The allowed use may deviate from the allowed land use listing of the primary land use district where required findings for a planned development approval are made by the designated approving authority pursuant to Chapter 19.43 (Planned Development).

Article 3: - Administration, Permits and Procedures Chapter 19.28 - Approval Requirements and Common Procedures

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