Menlo Park Municipal Code § 12.16.010 Amendment of Section

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Editor's note: Ord. 1124, 8/26/2025 added sections 12.16.030 and 12.16.040 which were repealed by Ord. 1127, 11/4/2025.

§ 12.16.010. Amendment of Section 150.2(a) additions.¶

Based on the Climatic and Cost Effectiveness findings in Sections 1A and 1B of the ordinance codified in this chapter, Section 150.2(a) of the 2025 California Energy Code, Part 6 of the California Building Standards Code, Title 24 California Code of Regulations is amended to read as follows:

(a) Additions. Additions to existing single-family residential buildings shall meet the requirements of Sections 110.0 through 110.9; Section 150.0(a) through (n), (p) and (q); Section 150.2(a)1 or 2; and as follows:

An addition to a single-family building originally constructed prior to 2011, with a stated project valuation of $100,000 or more, is required to submit documentation that two items from the following list of energy efficiency measures are included in the scope of work, in addition to any requirements imposed under California Energy Code § 150.2.

Note: The amount of $100,000 shall be automatically adjusted for inflation annually on January 1 of each year beginning in 2025 based upon the California Construction Cost Index published by the California Department of General Services from data produced by the Engineering News Record.

Energy Efficient Measures and Electrification:

A	Install R-49 attic insulation and apply air sealing practices in all accessible areas of the building.
B.	Seal ducts to meet the requirements of Section 150.2(b)1.E of the 2025 California Energy Code.
C.	Install R-15 wall insulation on exterior walls, where the studs are exposed as part of the work scope, to meet the requirements of Section 150.0(c) of the 2025 California Energy Code.
D.	Install R-19 insulation at raised floor assemblies meeting standards of 2025 California Energy Code Section 150.0(d).
E.	Install R-3 insulation on all accessible hot water piping. Install R-6 insulation to the exterior of existing residential tank storage water heaters.
F.	Replace all screw in incandescent and CFL lamps with lamps of an efficacy of 45 lumens per watt or greater in all light fixtures per 2025 California Energy Code Section 150.0(k).
G.	Replace fuel gas furnace with an electric heat pump system meeting the Requirements of the 2025 California Energy Code Section 150.2(b)1C or F with another high efficiency electric space heating system if approved by the Building Official.
H.	Replace fuel gas water heater with a heat pump water heater meeting the requirements of 2025 California Energy Code Section 150.2(b)1H.iii.(b) or 150.2(b)1H.iii.(c), or with other high efficiency electric water heating system per approval of the Building Official.
I.	Implement one or more recommendations specified in a Home Energy Score or Home Energy Audit report that has been completed within the last five years and that is submitted with the application for a building permit, with the approval of such a recommendation by the Building Official.

Exception 1 to Section 150.2(a) Energy Efficient Measures and Electrification A -I: A Home Energy Score Report for the single-family building, completed within the last 5 years, demonstrating that the building already has a minimum Home Energy Score of 7, is submitted to the Building Official. Exception 2 to Section 150.2(a) Energy Efficient Measures and Electrification A — I: The Building Official shall not require the installation of Energy Efficient Measures and Electrification Measures F and/or G if one or more of the following conditions apply:

a.	An existing space heating system is not required to be replaced when the unique features of the construction of the single-family building structure, including, but not limited to existing heating and/or cooling system(s) that are not configured for conversion to forced air systems preclude installation of those measures.
b.	The installation of the measures is not commensurate with the project's scope and budget, as determined by the Building Official, because the cost of those measures would exceed 20% of the total project cost or require substantial construction in areas of the residential structure that would otherwise not be part of the project.
c.	Requiring the installation of measures is otherwise prohibited by other applicable laws.
Exception 3 to Section 150.2(a): Additions of 300 square feet or less are exempt from the roofing requirements of Section 150.1(c)11.
Exception 4 to Section 150.2(a): Existing inaccessible piping shall not require insulation as defined under Section 150.0(j)1.
Exception 5 to Section 150.2(a): Space-conditioning system. When heating or cooling will be extended to an addition from the existing system(s), the existing heating and cooling equipment need not comply with Part 6. The heating system capacity must be adequate to meet the minimum requirements of CRC Section 303.10.
Exception 6 to Section 150.2(a): Space-conditioning system ducts. When any length of duct is extended from an existing duct system to serve the addition, the existing duct system and the extended duct shall meet the applicable requirements specified in Section 150.2(b)1Di and 150.2(b)1Dii.
Exception 7 to Section 150.2(a): Additions 1,000 square feet or less are exempt from the ventilation cooling requirements of Section 150.1(c)12.
Exception 8 to Section 150.2(a): Photovoltaic systems, as specified in Section 150.1(c)14, are not required for additions.

(Ord. 1127, 11/4/2025)

Exceptions & meaning →

§ 12.16.020. Amendment of Section 150.2(b) alterations.¶

Based on the Climatic and Cost Effectiveness findings in Sections 1A and 1B of the ordinance, codified in this chapter, Section 150.2(b) of the 2025 California Energy Code, Part 6 of the California Building Standards Code, Title 24 California Code of Regulations is amended to read as follows:

(b)	Alterations. Alterations to existing single-family residential buildings or alterations in conjunction with a change in building occupancy to a single-family residential occupancy shall meet either item 1 or 2 below and comply with the requirements below:
	An alteration to a single-family building originally constructed prior to 2011, with a stated project valuation of $100,000 or more, is required to submit documentation that two items from the following list of energy efficiency measures are included in the scope of work, in addition to any requirements imposed under California Energy Code Section 150.2.
	Note: The amount of $100,000 shall be automatically adjusted for inflation annually on January 1 of each year beginning in 2025 based upon the California Construction Cost Index published by the California Department of General Services from data produced by the Engineering News Record.

Energy Efficient Measures and Electrification:

A.	Install R-49 attic insulation and apply air sealing practices in all accessible areas of the building.
B.	Seal ducts to meet the requirements of Section 150.2(b)1.E of the 2025 California Energy Code.
C.	Install R-15 wall insulation on exterior walls, where the studs are exposed as part of the work scope, to meet the requirements of Section 150.0(c) of the 2025 California Energy Code.
D.	Install R-19 insulation at raised floor assemblies meeting standards of 2025 California Energy Code Section 150.0(d).
E.	Install R-3 insulation on all accessible hot water piping. Install R-6 insulation to the exterior of existing residential tank storage water heaters.
F.	Replace all screw in incandescent and CFL lamps with lamps of an efficacy of 45 lumens per watt or greater in all light fixtures per 2025 California Energy Code Section 150.0(k).
G.	Replace fuel gas furnace with an electric heat pump system meeting the Requirements of the 2025 California Energy Code Section 150.2(b)1C or F, or with another high efficiency electric space heating system if approved by the Building Official.
H.	Replace fuel gas water heater with a heat pump water heater meeting the requirements of 2025 California Energy Code Sections 150.2(b)1H.iii.(b) or 150.2(b)1H.iii.(c), or with other high efficiency electric water heating system per approval of the Building Official.
I.	Implement one or more recommendations specified in a Home Energy Score or Home Energy Audit report that has been completed within the last five years and that is submitted with the application for a building permit, with the approval of such a recommendation by the Building Official.

Exception 1 to Section 150.2(b) Energy Efficient Measures and Electrification A-I: A Home Energy Score Report for the single-family building, completed within the last 5 years, demonstrating that the building already has a minimum Home Energy Score of 7, is submitted to the Building Official. Exception 2 to Section 150.2(b) Energy Efficient Measures and Electrification A — I: The Building Official shall not require the installation of Energy Efficient Measures and Electrification Measures F and/or G if one or more of the following conditions apply:

a.	An existing space heating system is not required to be replaced when the unique features of the construction of the single-family building structure, including, but not limited to existing heating and/or cooling system(s) that are not configured for conversion to forced air systems preclude installation of those measures.
b.	The installation of the measures is not commensurate with the project's scope and budget, as determined by the Building Official, because the cost of those measures would exceed 20% of the total project cost or require substantial construction in areas of the residential structure that would otherwise not be part of the project.
c.	Requiring the installation of measures is otherwise prohibited by other applicable laws.

(Ord. 1127, 11/4/2025)

Exceptions & meaning →