Original Zoning Code (Chapter 1)
The zoning regulations in all areas of the City excluding Downtown (that is, any Community Plan effective prior to the Downtown Community Plan, which went into effect in January 2025) are in the Original Zoning Code (Chapter 1). These regulations are published in the Municipal Code. The City's zoning provisions regulate many aspects of how land may be used―everything from specifying where different uses may be located to outlining the processes for requesting relief from certain land use regulations. The processes for reviewing project planning applications and requests, for all areas of the City are outlined in Article 13 (Administration) of Chapter 1A of the Municipal Code. These citywide Processes and Procedures for all projects are contained in the New Zoning Code (Chapter 1A).
In Los Angeles’s Original Zoning Code (Chapter 1), similar land uses are grouped into general categories and referenced by a letter in the alphabet. This letter is followed by a number to signify the allowable intensity of the use or, in some cases, the density.
The Original Zoning Code (Chapter 1) also establishes limitations on the size and scale of buildings through the use of height districts. The height district limits the height of a building and its square footage. The height district is defined by a number, which appears after the zone class.
From time to time, properties may be subject to further development limitations—land use restrictions that prevent construction of a building at the maximum height or mass. These properties have a prefix or an additional suffix attached to the height district.
In a city as large as Los Angeles, some neighborhoods or districts are subject to unique or tailored zoning regulations― known as Overlay and Specific Plans, which function as an additional layer of zoning rules. Properties located within an overlay are typically identified by a series of letters at the end of the zoning string but may also be identified by a unique zone.