Permit Requirements for Hollister, California

For Plumbing projects in Hollister, determining the correct permitting authority depends on whether the project site is located within the incorporated city limits or in an unincorporated area of San Benito County.

Authority Having Jurisdiction (AHJ)

Most jurisdictions require permits for Plumbing work to ensure safety and code compliance. The governing body responsible for issuing these permits varies by specific location:

General Plumbing Guidelines

Permits are usually required for new installations, structural modifications, or major repairs. While minor maintenance or cosmetic updates may be exempt, landowners should always verify local codes before work begins.

Because Hollister is located within San Benito County, the following broader county regulations may also apply to your project:

California, San Benito County Plumbing Permit Regulations and County Ordinances for Unincorporated Areas

San Benito County Building & Code Enforcement

San Benito County's Building & Code Enforcement Division is responsible for ensuring that construction within the county meets minimum code requirements for health, safety, and welfare. This division handles the application, plan review, and issuance of building permits. They also enforce building codes and other applicable ordinances. For properties in unincorporated areas, this division, through its Code Enforcement arm, specifically enforces grading and building codes to ensure health and safety. Planning and zoning violations in unincorporated areas are also handled by the Code Enforcement Division of the Planning Division.

Unincorporated Areas

For properties located in unincorporated areas of San Benito County, the Code Enforcement Division of the Building Services Division is specifically tasked with enforcing grading and building codes to ensure public health and safety. They also address planning and zoning violations within these areas.

Resources to Learn More

The following statewide building codes and regulations apply universally to all jurisdictions within California:

California Plumbing Legislation, Codes, and Guidelines

California Plumbing Code and Legislation

In California, plumbing standards are governed by the California Plumbing Code (CPC), which is Part 5 of Title 24 of the California Code of Regulations. Unlike many other states that adopt the International Plumbing Code (IPC), California bases its plumbing code on the Uniform Plumbing Code (UPC). The state integrates the UPC with specific California amendments to address unique regional requirements, such as seismic safety, water conservation, and drought management.

The California Building Standards Code is updated on a triennial cycle. As of April 2026, the 2025 California Plumbing Code is the current enforceable standard, having taken effect on January 1, 2026. These regulations apply to all new construction, major renovations, and plumbing system installations across residential, commercial, and industrial properties throughout the state.

Primary State Agencies

The regulatory framework for plumbing in California involves several key entities:

Resources to Learn More

Help Us Improve This Guide

Did you find a dead link, or do you have the direct link to the Hollister permit application portal? Help us keep this information accurate by submitting an update.