Skip to content

Title 30 — RESIDENTIAL CODE

Los Angeles County Municipal Code Ch. 1 Administration

Los Angeles County Municipal Code · 2026-09 edition · updated 2026-10-04 · Los Angeles County

Cite as: Los Angeles County Municipal Code Chapter 1 · Text as of 2026-10-04

R100 - ADOPTION AND INCORPORATION BY REFERENCE

Except as hereinafter changed or modified, Sections 102 through 119 of Chapter 1, Section 1206 of Chapter 12, and Chapters 67, 68, 69, 98, 99, and Appendix J, of Title 26 of the Los Angeles County Code are adopted and incorporated by reference into this Title 30 as if fully set forth below, and shall be known as Sections 102 through 119 of Chapter 1, Section 1206 of Chapter 12, and Chapters 67, 68, 69, 98, 99, and Appendix J, of Title 30 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 10, Chapter 44, and Appendices BB, BF, BJ, and CJ, of that certain code known and designated as the 2025 California Residential Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 30 as if fully set forth below, and shall be known as Chapters 2 through 10, Chapter 44, and Appendices BB, BF, BJ, and CJ, of Title 30 of the Los Angeles County Code. A copy of the 2025 California Residential Code shall be at all times maintained by the Building Official for use and examination by the public.

(Ord. 2025-0051 § 2, 2025; Ord. 2022-0055 § 2, 2022; Ord. 2019-0060 § 2, 2019; Ord. 2016-0057 § 2, 2016; Ord. 2013-0052 § 2, 2013; Ord. 2010-0057 § 1, 2010.)

R101 - TITLE, PURPOSE, AND INTENT R101.1 - Title.

Title 30 of the Los Angeles County Code shall be known as the Residential Code and may be cited as such, and will be referred to herein as "these regulations" or "these building standards" or "this Code."

(Ord. 2016-0057 § 2, 2016; Ord. 2010-0057 § 1, 2010.)

R101.2 - Purpose and Intent.

The purpose of this Code is to provide minimum standards to preserve the public safety, health, and welfare by regulating the design, construction, installation, quality of materials, use, occupancy, location, and maintenance of all buildings, structures, grading, and certain equipment as specifically set forth herein. Consistent with this purpose, the provisions of this Code are intended to confer a benefit on the community as a whole and are not intended to establish a duty of care toward any particular person.

This Code shall not be construed to hold the County of Los Angeles or any officer, employee, or agent thereof responsible for any damage to persons or property by reason of any inspection authorized herein or by reason of the issuance or non- issuance of any permit authorized herein, and/or for any action or omission in connection with the application and/or enforcement of this Code. By adopting the provisions of this Code, the County does not intend to impose on itself, its employees, or agents any mandatory duties of care toward persons and property within its jurisdiction so as to provide a basis of civil liability for damages.

This Section is declaratory of existing law and is not to be construed as suggesting that such was not the purpose and intent of previous Code adoptions.

(Ord. 2010-0057 § 1, 2010.)

R101.3 - Scope.

The provisions of this Code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, demolition, and grading of detached one- and two-family dwellings and townhouses not more than three stories above grade plane in height with a separate means of egress and their accessory structures that are located within the unincorporated territory of the County of Los Angeles and to such work or use by the County of Los Angeles in any incorporated city.

Exceptions:

Live/work units complying with the requirements of Section 508.5 of the Los Angeles County Building Code shall be permitted to be built as one- and two-family dwellings or townhouses. Fire suppression otherwise required by Section 508.5.7 of the Los Angeles County Building Code for buildings and structures constructed under this Code shall conform to Section 903.3.1.3 of the Los Angeles County Building Code.

Owner-occupied lodging houses with five or fewer guestrooms shall be permitted to be constructed in accordance with the Los Angeles County Residential Code for one- and two-family dwellings when equipped with a fire sprinkler system in accordance with Section R309.

Additions, alterations, repairs, and changes of use or occupancy in all buildings and structures to which this Code applies shall comply with the provisions for new buildings and structures except as otherwise provided in the Existing Building Code and Section 109 of the Los Angeles County Building Code.

(Ord. 2025-0051 § 2, 2025; Ord. 2022-0055 § 2, 2022; Ord. 2019-0060 § 2, 2019; Ord. 2016-0057 § 2, 2016; Ord. 2010-0057 § 1, 2010.)

R101.4 - Applicability R101.4.1 - General.

Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall be applicable. Where, in any specific case, different Sections of this Code specify different materials, methods of construction, or other requirements, the most restrictive shall govern.

(Ord. 2010-0057 § 1, 2010.)

R101.4.2 - Other laws.

The provisions of this Code shall not be deemed to nullify any provisions of local, state, or federal law.

(Ord. 2010-0057 § 1, 2010.)

R101.4.3 - Referenced codes and standards.

The codes and standards referenced in this Code shall be considered part of the requirements of this Code to the prescribed extent of each such reference. Where differences occur between provisions of this Code and referenced codes and standards, the provisions of this Code shall apply.

(Ord. 2010-0057 § 1, 2010.)

Get a plain-English answer with a citation back to this text.

Ask AI about this code
▸Contents — Los Angeles County Municipal Code

GoCodebook provides public access, search, citation, multilingual explanation, and practical interpretation of legally adopted building regulations. It is not a substitute for the official ICC or California code publications.