Mountain View Municipal Code Div. 6 Residential Electric Vehicle Charging Requirements

Subsection 4.106.4.1 of the 2025 California Green Building Standards Code is deleted and replaced with subsection A4.106.8.1 in Appendix A4, as a mandatory measure, amended to read as follows:

4.106.4.1. New construction one- and two-family dwellings, accessory dwelling units, and townhouses with attached private garages. For each dwelling unit, a dedicated 208/240-volt branch circuit shall be installed in the raceway. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service panel or subpanel and shall terminate into a listed cabinet, box, or other enclosure in close proximity to the proposed location of an EV charger. Raceways are required to be continuous at enclosed, inaccessible or concealed areas and spaces. The branch circuit and associated overcurrent protective device shall be rated at 40 amperes minimum (Level 2 EVSE). Other electrical components, including a receptacle or blank cover, related to this section shall be installed in accordance with the California Electrical Code. All other parking shall be Level 1 EV-ready.

(Ord. No. 9.2025, § 6(Exh. B), 9/9/25.)

Add a new subsection 4.106.4.1.2 to subsection 4.106.4.1 (New One- and Two-Family Dwellings and Townhouses with Attached Private Garages) in the 2025 California Green Building Standards Code to read as follows:

4.106.4.1.2 Additions and alterations to existing single-family dwellings, duplexes, accessory dwelling units and townhomes with private garages. Any of the following work that requires a building permit must have reserved breaker space(s) and electrical capacity to accommodate a future dedicated 208/240-volt branch circuit, including the raceway requirements in accordance with Section 8.72.05 of this Chapter:

a. An addition of new covered parking to an existing covered parking structure (e.g. carport or garage);

b. A new, reconstructed or expanded covered parking structure; or

c. An electrical panel upgrade as part of an alteration or addition to an existing dwelling.

(Ord. No. 9.2025, § 6(Exh. B), 9/9/25.)

Subsection 4.106.4.2 of the 2025 California Green Building Standards Code is amended to read as follows:

4.106.4.2 New construction multifamily dwellings, hotels and motels and new residential parking facilities. When parking is provided, parking spaces for new multifamily dwellings shall meet the requirements of Section 4.106.4.2.2, as amended per Sec. 8.72.20, and hotels and motels shall meet the requirements of Section 4.106.4.2.6. Calculations for spaces shall be rounded up to the nearest whole number. A parking space served by electric vehicle supply equipment or designed as an EV charging space shall count as at least one standard automobile parking space only for the purpose of complying with any applicable minimum parking space requirements established by a local jurisdiction. See Vehicle Code Section 22511.2 for further details.

(Ord. No. 9.2025, § 6(Exh. B), 9/9/25.)

Subsection 4.106.4.2.2 of the 2025 California Green Building Standards Code is amended to read as follows:

4.106.4.2.2 Multifamily dwellings.

1. Required EV ready parking spaces with receptacles:

a. Parking facilities with assigned parking. Where dwelling units are provided with assigned parking spaces equal to or greater than the number of dwelling units, at least one low power Level 2 EV charging receptacle shall be provided at an assigned parking space for each dwelling unit.

1. Where the total number of dwelling units exceeds the number of assigned parking spaces, all assigned parking spaces shall be provided with one low power Level 2 EV charging receptacle.

b. Parking facilities with unassigned parking. Where dwelling units are provided with unassigned parking spaces equal to or greater than the number of dwelling units, at least one low power Level 2 EV charging receptacle shall be provided at an unassigned parking space for each dwelling unit.

1. Where the total number of dwelling units exceeds the number of unassigned parking spaces, all unassigned parking spaces shall be provided with one low power Level 2 EV charging receptacle.

c. Parking facilities with assigned and unassigned parking. Where multifamily buildings are provided with both assigned and unassigned parking spaces equal to or greater than the number of dwelling units, at least one low power Level 2 EV charging receptacle charger shall be provided for each dwelling unit at either the assigned or unassigned parking space, such that the total number of EV charging receptacles installed is not less than the total number of dwelling units and that each unit has access to an EV charging space.

d. Receptacle power source. EV charging receptacles in multifamily parking facilities at assigned parking spaces shall be provided with a dedicated branch circuit connected to the dwelling unit's electrical panel, unless determined as infeasible by the project builder or designer and subject to concurrence by the building official.

e. Receptacle configurations. 208/240 EV charging receptacles shall comply with one of the following configurations:

1. For 20-ampere receptacles, NEMA 6-20R

2. For 30-ampere receptacles, NEMA 12-30R

3. For 50-ampere receptacles, NEMA 14-50 R

Exception for 1, subsections a, b, and d: Areas of parking facilities served by parking lifts, including but not limited to, automated mechanical-access open parking garages as defined in the California Building Code; or parking facilities otherwise incapable of supporting electric vehicle charging.

2. Required EVCS parking spaces to be installed with EV chargers.

a. Parking facilities with unassigned or common use parking. In addition to the low power Level 2 EV charging receptacle requirements of Section 4.106.4.2.2(1), the following EVCS shall be installed:

i. For properties with 20 units or less, forty (40) percent of total parking spaces must have an EVCS Level 2 EV charger installed, with a minimum of twenty five (25) percent of unassigned or common use parking spaces being installed with EVCS Level 2 and made available for use by all residents or guests.

ii. For properties with 21 or more units, fifteen (15) percent of total parking spaces must have EVCS Level 2 charger installed, with a minimum of twenty five (25) percent of unassigned or common use parking spaces being installed with EVCS Level 2 EV chargers made available for use by all residents or guests.

b. EV charger connectors. EV chargers shall be equipped with J1772 or J3400 connectors.

c. An automatic load management system (ALMS) may be used to reduce the maximum required electrical capacity to each space served by the ALMS. The electrical system and any on-site distribution transformers shall have sufficient capacity to deliver at least 3.3 kW simultaneously to each EV charging station (EVCS) served by the ALMS. The branch circuit shall have a minimum capacity of 40 amperes, and installed EV chargers shall have a capacity of not less than 30 amperes.

3. Required EV Level 3/DC Fast Charger. One (1) Level 3EV DC Fast Charger is required to be installed for every 100 parking spaces, or fraction of 100 parking spaces thereof, and located in a common use (unassigned) parking area for residents and/or guests for their use.

4. All remaining parking spaces to be EV Ready. Any remaining parking spaces not served by EV charging receptacles or chargers, after fulfilling the requirements of subsections 1, 2 and 3 above, shall be made Level 1 EV Ready.

Exception for 4.106.4.2.2: In accordance with Government Code Section 65863.2(f), for new multi-family residential and nonresidential development on properties located within one-half (1/2) mile of a major transit stop as defined in Section 21155 of the Public Resources Code, the "total number of actual parking spaces" for purposes of this table and determination of the number of EV-capable spaces is based on the minimum number of parking spaces that, absent Government Code Section 658363.2, would otherwise be required for the development per Chapter 36 of this Code.

(Ord. No. 9.2025, § 6(Exh. B), 9/9/25.)

Subsection 4.106.4.2.6 of the 2025 California Green Building Standards Code is amended to read as follows:

4.106.4.2.6 Hotels and motels.

1. Required EV ready parking spaces with receptacles:

a. Hotels and motels. Forty (40) percent of the total number of parking spaces shall install low power Level 2 EV charging receptables made available for use by hotel employees, guests, and visitors.

Exception: Areas of parking facilities served by parking lifts, including but not limited to automated mechanical-access open parking garages as defined in the California Building Code; or parking facilities otherwise incapable of supporting electric vehicle charging.

a. Receptacle configurations. 208/240V EV charging receptables shall comply with one of the following configurations:

1. For 20-ampere receptacles, NEMA 6-20R

2. For 30-ampere receptacles, NEMA 14-30R

3. For 50-ampere receptacles, NEMA 14-50R

4. Required EVCS parking spaces to be installed with EV chargers.

a. Hotels and motels. Twenty-five (25) percent of the total number of parking spaces shall install Level 2 EV chargers made available to hotel employees, guests, and visitors.

b. EV charger connectors. EV chargers shall be equipped with J1772 or J3400 connectors.

Exception: Areas of parking facilities served by parking lifts, including but not limited to, automated mechanical-access open parking garages as defined in the California Building Code; or parking facilities otherwise incapable of supporting electric vehicle charging.

c. An automatic load management system (ALMS) may be used to reduce the maximum required electrical capacity to each space served by the ALMS. The electrical system and any on-site distribution transformers shall have sufficient capacity to deliver at least 3.3 kW simultaneously to each EV charging station (EVCS) served by the ALMS. The branch circuit shall have a minimum capacity of 40 amperes, and installed EV chargers shall have a capacity of not less than 30 amperes.

3. Required EV Level 3/DC Fast Charger. One (1) Level 3 EV/DC Fast Charger is required to be installed for every 100 parking spaces, or fraction of 100 parking spaces thereof, and located in a common parking area for hotel employee, guest or visitor use.

4. All remaining parking spaces to be EV Ready. Any remaining parking spaces not served by EV charging receptacles or chargers, after fulfilling the requirements of subsections 1, 2 and 3 above, shall be made Level 1 EV Ready.

Exception for 4.106.4.2.6: In accordance with Government Code Section 65863.2(f), for new multi-family residential and nonresidential development on properties located within one-half (1/2) mile of a major transit stop as defined in Section 21155 of the Public Resources Code, the "total number of actual parking spaces" for purposes of this table and determination of the number of EV-capable spaces is based on the minimum number of parking spaces that, absent Government Code Section 658363.2, would otherwise be required for the development per Chapter 36 of this Code.

(Ord. No. 9.2025, § 6(Exh. B), 9/9/25.)