Title 25 Rulemaking

HCD proposes and adopts regulations for the programs under its enforcement or administrative authority in order to implement, interpret, or specify laws enacted by the Legislature.

The California Code of Regulations (CCR) is compiled into titles and organized into divisions containing the regulations of state agencies. HCD has statutory authority to develop regulations for two titles: title 24, Building Standards Code and title 25, Housing and Community Development. The information provided below is specific to title 25 rulemakings. More information on title 24 rulemakings can be found on HCD’s Building Code Development & Adoption (Title 24) page.

Complete the Email Sign-Up form and select the notifications you wish to receive to stay up to date on HCD’s Division of Codes and Standards rulemaking activities.

HCD’s Division of Codes and Standards is responsible for establishing, maintaining, updating, and enforcing regulations that affect the health and safety of housing and communities. Specifically:

  • Mobilehomes
  • Manufactured homes
  • Multifamily manufactured homes
  • Floating homes
  • Truck campers
  • Mobilehome parks and special occupancy parks
  • Factory-built housing
  • Employee housing
  • Commercial modulars
  • Special purpose commercial modulars
  • Hotels, motels, apartment houses, and dwellings or portions thereof and buildings and structures accessory thereto

Existing laws and regulations for these programs can be found on the individual program pages.

HCD’s rulemaking process is an opportunity for the Department and interested parties to work together to develop regulations that impact the general welfare and well-being of the public.

One of the first required steps in rulemaking is to file a Notice of Proposed Action (Notice) with the Office of Administrative Law (OAL). Once filed, OAL will publish the Notice in the California Regulatory Notice Register (Register). HCD will also post the Notice on its website for public review.

The published Notice contains information about the proposed rulemaking, including deadlines for submitting public comments, where to locate the initial proposed express terms, and the initial statement of reasons.

A public comment period will be noted on the day the Notice is published in the Register. During the open comment period, the public is allowed to submit comments specific to the posted rulemaking package. See below for more information on public comments.

Government Code section 11346 provides that every California state agency must meet the basic minimum procedural requirements set up by the Administrative Procedure Act (APA) for the adoption, amendment, or repeal of an administrative regulation unless the agency is expressly exempted by statute. The rulemaking process must also comply with the regulations adopted by OAL.

Public comment periods provide interested parties with a meaningful opportunity to participate in the adoption of regulations.

Public comment periods are typically 15 – 45 days. The Notice of Proposed Action specific to each rulemaking package contains the information needed to submit public comments and the public comment timeframes.

There are multiple ways you can submit comments:

Electronically via the Public Comment Portal — Please note: The portal is available to provide feedback on proposed title 25 rulemaking packages during the public comment period only. Please check Current Rulemaking Activities for proposed regulations that are open for public comment.

By mail to:
California Department of Housing and Community Development
Division of Codes and Standards
P.O. Box 277820
Sacramento, CA 95827-7820
ATTN: PACKAGE NAME — Housing Regulations Team

By email to:
Subject Line: PACKAGE NAME — Housing Regulations Team

Current title 25 rulemaking packages are listed below. Members of the public are encouraged to participate in the rulemaking process by submitting public comments using the electronic portal for proposed regulations listed below. Note that the electronic portal is only active for proposed regulations during the public comment period.

Proposed Regulations — Senate Bill 869 (Chapter 662, Statutes of 2022)

HCD is proposing regulations to clarify and make specific the Mobilehome and Recreational Vehicle Park Manager Act, as mandated by Senate Bill 869 (Chapter 662, Statutes of 2022) (SB 869) which created Part 2.3.1 of Division 13 of the Health and Safety Code. SB 869 requires HCD to develop regulations for a Park Manager Training Program by May 1, 2025. SB 869 requires at least one person for each park (employed or acting as an onsite manager) receive training by May 1, 2026, and also requires the completion of continuing education every two (2) years thereafter. SB 869 allows HCD to approve third-party providers to administer the training curriculum to park managers.

A stakeholder focus group was held on February 22, 2024 — Focus Group Notice and Agenda (PDF). A public comment period on draft proposed regulatory text (DOC) was held May 23, 2024, through June 6, 2024.

Please complete the Email Sign-Up form to receive HCD emails for updates on the program regulations.

Proposed Regulations — Mobilehome Residency Law Protection Program (MRLPP) Emergency Regulations

HCD is proposing to amend California Code of Regulations, title 25, chapter 3.5. Emergency action of proposed amendments to chapter 3.5 are necessary to provide continuity of service to manufactured / mobilehome homeowners that submit Mobilehome Residency Law (MRL) complaints for referral to contracted legal services providers. The proposed regulations are necessary to execute legal services provider contracts in a timely manner without loss of service and to comply with statutory requirements of the Mobilehome Residency Law Protection Act to refer complaints to contracted nonprofit legal services providers. Assembly Bill 318 (Chapter 736, Statutes of 2023) deems the adoption of these regulations to be an emergency.