Rancho Cordova Municipal Code Ch. 16.04 Building Code (CA)

§ 16.04.010. Title.¶

This chapter shall be known and cited as the Rancho Cordova building code.

(Ord. 11-2025, 11/17/2025)

§ 16.04.020. Purpose.¶

The purpose of the Rancho Cordova building code is to provide minimum standards to safeguard life or limb, health, property, and public welfare by regulating and controlling the design, construction, installation, quality of materials, use and occupancy, location and maintenance of all buildings and structures within this jurisdiction, and certain equipment specifically regulated herein.

(Ord. 11-2025, 11/17/2025)

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§ 16.04.030. Adoption of building codes.¶

The 2025 California Building Code, Part 2, Title 24 of the California Code of Regulations (hereinafter referred to as the "State Code"), incorporating the International Building Code, 2024 Edition, published by the International Code Council, including Appendix C (Group U- Agricultural Buildings), and any rules and regulations promulgated pursuant thereto, are hereby adopted and incorporated by reference herein. Except as otherwise provided by this chapter and Chapter 16.02 RCMC, the provisions thereof shall be controlling within the limits of the city of Rancho Cordova.

(Ord. 11-2025, 11/17/2025)

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§ 16.04.040. Amendment of adopted codes.¶

Notwithstanding the provisions of RCMC § 16.04.030, the State Code is amended as follows:

A. Section 1907.4, "Vapor retarder," is amended to read as follows:

1907.4 Vapor retarder. Groups R-1 and R-3 occupancies with concrete floors bearing on the ground shall have provided below the concrete floor a minimum of 4 inches of clean, well graded crushed rock or gravel 3/8 inch minimum to 1 1/2 inches maximum size. All occupancies; A 10-mil (0.010 inch; 0.254 mm) polyethylene vapor retarder conforming to ASTM E 1745 Class A requirements with joints lapped not less than 6 inches (152 mm) shall be placed between the concrete floor slab and the base course or the prepared subgrade where a base course does not exist, or other approved equivalent methods or materials shall be used to retard vapor transmission through the floor slab.

Exception: A vapor retarder is not required:

1.	For detached structures accessory to occupancies in Group R-3, such as garages, utility buildings or other unheated facilities.
2.	For unheated storage rooms having an area of less than 70 square feet (6.5 m 2 ) and carports attached to occupancies in Group R-3.
3.	For buildings of other occupancies where migration of moisture through the slab from below will not be detrimental to the intended occupancy of the building.
4.	For driveways, walks, patios and other flatwork which will not be enclosed at a later date.
5.	Where approved by the building official, based on local site conditions.

(Ord. 11-2025, 11/17/2025)

Exceptions & meaning →