Title 24 · California Energy Code

What are the raceway, panel space and identification requirements for single‑family ‘EV capable’ homes?

For new single‑family homes with attached garages you must install a continuous listed conduit of at least 1‑inch trade size from the main service/subpanel to a box near the future charger, reserve panel capacity and breaker space for a 40‑amp 208/240‑volt circuit, and label the panel directory and the conduit termination “EV CAPABLE.” These mandatory requirements are in **§ 4.106.4.1** and **§ 4.106.4.1.1**.

Ask a question free See coverage

Last reviewed: July 6, 2026

What the code requires — 2–4 sentences

For new one‑ and two‑family dwellings and townhouses with attached private garages, the code requires installation of a listed raceway from the main service or subpanel to a location near the future EV charger, sized at trade size 1 (nominal 1‑inch inside diameter), and the electrical service/panel must provide capacity and reserved space for a 40‑ampere 208/240‑volt minimum dedicated branch circuit. The service panel (or subpanel) directory and the raceway termination must be permanently and visibly labeled “EV CAPABLE.” These requirements are in § 4.106.4.1 and § 4.106.4.1.1 of the code.

The single most important rule: install a continuous listed 1‑inch raceway from the main service/subpanel to a box near the proposed EV charger, reserve panel space for a 40 A 208/240 V circuit, and mark both the panel directory and the conduit termination “EV CAPABLE.” § 4.106.4.1 and § 4.106.4.1.1.

Requirements in detail

Raceway (where and how big)

  • Install a listed raceway that:
    • Originates at the main service or a subpanel that serves the dwelling.
    • Terminates into a listed cabinet, box or other enclosure in close proximity to the proposed EV charger location.
    • Is not less than trade size 1 (nominal 1‑inch inside diameter). § 4.106.4.1.
  • Raceways must be continuous through enclosed, inaccessible, or concealed spaces (no short, exposed gaps). § 4.106.4.1.

Panel capacity and reserved panel space

  • The service panel or subpanel shall provide capacity to install a 40‑ampere, 208/240‑volt minimum dedicated branch circuit, and shall provide space(s) reserved to permit installation of the branch‑circuit overcurrent protective device (i.e., a physical breaker space). § 4.106.4.1.
  • Appendix guidance (voluntary) clarifies that the branch circuit and associated overcurrent device are rated at 40 amperes minimum and that receptacles or blank covers be installed per the California Electrical Code. A4.106.8.1.

Identification / marking

  • The service panel (or subpanel) circuit directory must identify the reserved overcurrent protective device space(s) as “EV CAPABLE.” The raceway termination location must be permanently and visibly marked as “EV CAPABLE.” § 4.106.4.1.1.
  • Note: the Appendix uses the term “EV READY” for voluntary/residential guidance; the mandatory residential requirement uses “EV CAPABLE.” See A4.106.8.1.1 for the appendix wording.

Exception (when a raceway is not required)

  • A listed raceway is not required if, at time of original construction, a minimum 40‑ampere 208/240‑volt dedicated EV branch circuit is already installed in close proximity to the proposed charger location in accordance with the California Electrical Code. § 4.106.4.1 (Exception).

Quick reference table (decision‑relevant dimensions/values)

Item Required value / wording Code Reference
Minimum raceway trade size 1‑inch nominal (trade size 1) § 4.106.4.1
Raceway origin From main service or subpanel serving the dwelling § 4.106.4.1
Raceway termination Into a listed cabinet, box or other enclosure near proposed charger § 4.106.4.1
Continuity Continuous through enclosed/inaccessible/concealed spaces § 4.106.4.1
Panel capacity (reserved) Space and capacity to install a 40 A 208/240 V dedicated branch circuit § 4.106.4.1
Identification — panel directory Label reserved breaker space(s) “EV CAPABLE” § 4.106.4.1.1
Identification — raceway termination Mark raceway termination “EV CAPABLE” permanently and visibly § 4.106.4.1.1
Exception (no raceway needed) If 40 A 208/240 V dedicated branch circuit is installed at time of construction per CEC § 4.106.4.1 (Exception)

Exceptions & special cases

  • Utility or feasibility exceptions: Section 4.106.4 contains broader exceptions where local enforcing agency may determine EV infrastructure is not feasible (for example, no local utility power or the local utility unable to supply adequate power). Those exceptions apply at the project level; see § 4.106.4.
  • ADU/JADU: Accessory Dwelling Units and Junior ADUs without additional parking facilities are listed in the code exceptions; verify applicability with the local enforcing agency. § 4.106.4 exceptions.
  • If you instead install the required 40‑ampere 208/240‑volt dedicated branch circuit at the time of construction in accordance with the California Electrical Code, the raceway requirement is waived per the §4.106.4.1 exception.
  • Appendix language (A4.106.8) is voluntary guidance (e.g., “EV READY” wording and Tier 1/Tier 2 recommendations) and does not replace the mandatory § 4.106.4.1/4.106.4.1.1 wording.

Common mistakes

  • Installing a conduit smaller than 1‑inch trade size — this fails the minimum raceway size requirement in § 4.106.4.1.
  • Routing the raceway but leaving it discontinuous through concealed/enclosed spaces (stubs or gaps) — the raceway must be continuous. § 4.106.4.1.
  • Reserving panel capacity but not marking the reserved breaker space or raceway termination as “EV CAPABLE.” Identification is mandatory in § 4.106.4.1.1.
  • Confusing “EV READY” (appendix/voluntary wording) with the mandatory “EV CAPABLE” label required by § 4.106.4.1.1 — use the mandatory wording where the code requires it. file
  • Assuming the raceway can terminate far from the parking/charger area — the termination must be in close proximity to the proposed charger location. § 4.106.4.1.

Worked example — single‑family detached with attached garage

Scenario: New single‑family home, attached garage, one dwelling unit. You are preparing the electrical scope for final permit.

Action list (numbers pulled from code):

  1. From the main service panel, run a listed conduit sized trade size 1 (nominal 1‑inch) to a listed box mounted near where the owner will likely locate the EV charger (e.g., garage wall adjacent to parking). This conduit must be continuous through concealed spaces. § 4.106.4.1.
  2. At the service panel, reserve a breaker space and ensure the panel has capacity to install a 40‑ampere, 208/240‑volt dedicated branch circuit (i.e., free slot and enough bus capacity). § 4.106.4.1.
  3. On the panel directory, mark the reserved breaker space as “EV CAPABLE”, and permanently and visibly mark the raceway termination “EV CAPABLE.” § 4.106.4.1.1.
  4. If instead you elect to install the actual 40 A 208/240 V branch circuit (with appropriate breaker, conductors and termination) to the charger location at construction, you may skip installing the raceway (that is the explicit exception). Ensure that installation follows the California Electrical Code. § 4.106.4.1 (Exception).

Result: Inspectors will verify a continuous 1‑inch raceway or that the 40 A branch circuit is installed, that panel space and capacity are present, and that both panel directory and conduit termination are labeled “EV CAPABLE.” § 4.106.4.1 and § 4.106.4.1.1.

Related provisions

  • § 4.106.4 — Electric vehicle (EV) charging for new construction (exceptions and scope).
  • § 4.106.4.1 — New one‑ and two‑family dwellings and townhouses with attached private garages (raceway, panel space, capacity).
  • § 4.106.4.1.1 — Identification: required labeling of panel directory and raceway termination (“EV CAPABLE”).
  • A4.106.8.1 / A4.106.8.1.1 — Appendix voluntary guidance for single‑family (uses “EV READY” wording and shows how Tier 1/Tier 2 installations could be done).
  • § 5.106.5.3.1 — EV capable spaces and related raceway / panel requirements for nonresidential applications (useful for multifamily or shared garages).

Code references

Grounded in the retrieved California Energy Code — click a citation to read the verbatim passage:

  • § 5.106.5.3.1 High relevance — show source text

    1. 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. 5.106.5.3.1 EV capable spaces. [N] EV capable spaces shall be provided in accordance with Table 5.106.5.3.1 and the following requirements:

    2. Raceways complying with the California Electrical Code and no less than 1-inch (25 mm) diameter shall be provided and shall originate at a service panel or a subpanel(s) serving the area, and shall terminate in close proximity to the proposed location of the EV capable space and into a suitable listed cabinet, box, enclosure or equivalent. A common raceway may be used to serve multiple EV capable spaces.

    3. A service panel or subpanel(s) shall be provided with panel space and electrical load capacity for a dedicated 208/240 volt, 40-ampere minimum branch circuit for each EV capable space, with delivery of 30-ampere minimum to an installed EVSE at each EVCS.

    4. The electrical system and any on-site distribution transformers shall have sufficient capacity to supply full rated amperage at each EV capable space.

    5. The service panel or subpanel circuit directory shall identify the reserved overcurrent protective device space(s) as “EV CAPABLE”. The raceway termination location shall be permanently and visibly marked as “EV CAPABLE.” Note: A parking space served by electric vehicle supply equipment or designed as a future 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 an enforcement agency. See Vehicle Code Section 22511.2 for further details.

    TABLE 5.106.5.3.1—EV CAPABLE SPACES AND EVCS Col2 Col3 Col4
    TOTAL NUMBER OF ACTUAL
    PARKING SPACES    		 NUMBER OF REQUIRED EV
    CAPABLE SPACES    		 OTHER THAN OFFICE AND
    RETAIL
    NUMBER OF REQUIRED EVCS2, 3    		 OFFICE AND RETAIL
    NUMBER OF REQUIRED EVCS2, 3
    1–9 0 0 0
    10–25 4 2 3
    26–50 8 4 6
    51–75 13 6 8
    76–100 17 8 13
    101–150 25 12 19
    151–200 35 18 26
    201 and over 20 percent of actual parking
    spaces1    		 50 percent of EV capable spaces1 75 percent of EV capable spaces1
    1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1.
  • § 5.106.5.6.1 High relevance — show source text

    proposed location of the EV capable space and into a suitable listed cabinet, box, enclosure or equivalent. A common raceway may be used to serve multiple EV capable spaces. 2. A service panel or subpanel(s) shall be provided with panel space and electrical load capacity for a dedicated 208/240 volt, 40-ampere minimum branch circuit for each EV capable space, with delivery of 30-ampere minimum to an installed EVSE at each EVCS.

    1. The electrical system and any on-site distribution transformers shall have sufficient capacity to supply full rated amperage at each EV capable space.
    2. The service panel or subpanel circuit directory shall identify the reserved overcurrent protective device space(s) as “EV CAPABLE.” The raceway termination location shall be permanently and visibly marked as “EV CAPABLE.”
    TABLE 5.106.5.6.1 Col2 Col3
    TOTAL NUMBER OF PARKING SPACES NUMBER OF REQUIRED EV CAPABLE SPACES NUMBER OF REQUIRED EVCS2
    0–9 0 0
    10–25 4 1
    26–50 8 2
    51–75 13 3
    76–100 17 4
    101–150 25 6
    151–200 35 9
    201 and over 20 percent of total1 25 percent of EV capable spaces1
    1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.

    5.106.5.6.2 Electric vehicle charging stations (EVCS). EV capable spaces shall be provided with EVSE to create EVCS in the number indicated in Table 5.106.5.6.1 and shall comply with Section 5.106.5.6.2. EVCS shall be serviced by Level 2 or Direct Current Fast Charging (DCFC) EVSE, or with EVSE in any combination of Level 2 and DCFC. Accessible EVCS shall be provided in accordance with California Building Code Chapter 11B .

    5.106.5.6.2.1 Reduced number of EV capable spaces. The installation of each DCFC EVSE shall be permitted to reduce the minimum number of required EV capable spaces indicated in Table 5.106.5.6.1 by five and reduce proportionally the required electrical load capacity to the service panel or subpanel.

    5.106.5.6.2.2 Multiple connectors. EVSE with multiple vehicle connectors capable of charging multiple EVs simultaneously shall be permitted if the electrical load capacity required by Section 5.106.5.6.1 for each EV capable space is accumulatively supplied to the EVSE.

  • § 5.106.5 High relevance — show source text

    5.106.5 Electric vehicle (EV) charging.

    5.106.5.1 Reserved.

    5.106.5.2 Reserved.

    5.106.5.3 Electric vehicle (EV) charging. [N] [BSC-CG] Construction to provide electric vehicle infrastructure and facilitate electric vehicle charging shall comply with Section 5.106.5.3.1 EV capable spaces, Section 5.106.5.3.2 Electric vehicle charging stations and associated Table 5.106.5.3.1, or Section 5.106.5.3.6 Electric vehicle charging stations (EVCS)—Power allocation method and associated Table 5.106.5.3.6, and shall be provided in accordance with regulations in the California Building Code and the California Electrical Code. Exceptions:

    1. On a case-by-case basis where the local enforcing agency has determined compliance with this section is not feasible based upon one of the following conditions: a. Where there is no local utility power supply. b. Where the local utility is unable to supply adequate power. c. Where there is evidence suitable to the local enforcement agency substantiating that additional local utility infrastructure design requirements, directly related to the implementation of Section 5.106.5.3, may adversely impact the construction cost of the project.

    2. 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. 5.106.5.3.1 EV capable spaces. [N] EV capable spaces shall be provided in accordance with Table 5.106.5.3.1 and the following requirements:

    3. Raceways complying with the California Electrical Code and no less than 1-inch (25 mm) diameter shall be provided and shall originate at a service panel or a subpanel(s) serving the area, and shall terminate in close proximity to the proposed location of the EV capable space and into a suitable listed cabinet, box, enclosure or equivalent. A common raceway may be used to serve multiple EV capable spaces.

    4. A service panel or subpanel(s) shall be provided with panel space and electrical load capacity for a dedicated 208/240 volt, 40-ampere minimum branch circuit for each EV capable space, with delivery of 30-ampere minimum to an installed EVSE at each EVCS.

    5. The electrical system and any on-site distribution transformers shall have sufficient capacity to supply full rated amperage at each EV capable space.

    6. The service panel or subpanel circuit directory shall identify the reserved overcurrent protective device space(s) as “EV CAPABLE”. The raceway termination location shall be permanently and visibly marked as “EV CAPABLE.” Note: A parking space served by electric vehicle supply equipment or designed as a future 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 an enforcement agency. See Vehicle Code Section 22511.2 for further details.

  • § 1.2. High relevance — show source text

    RESIDENTIAL MANDATORY MEASURES

    1.2. Where there is evidence suitable to the local enforcing agency substantiating that additional local utility infrastructure design requirements, directly related to the implementation of Section 4.106.4, may adversely impact the construction cost of the project. 2. Accessory Dwelling Units (ADU) and Junior Accessory Dwelling Units (JADU) without additional parking facilities.

    4.106.4.1 New one- and two-family dwellings and townhouses with attached private garages. For each dwelling unit, install a listed raceway to accommodate a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service 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 service panel and/or subpanel shall provide capacity to install a 40-ampere 208/240-volt minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.

    Exception: A raceway is not required if a minimum 40-ampere 208/240-volt dedicated EV branch circuit is installed in close proximity to the proposed location of an EV charger at the time of original construction in accordance with the California Elec- trical Code .

    4.106.4.1.1 Identification. The service panel or subpanel circuit directory shall identify the overcurrent protective device space(s) reserved for future EV charging as “EV CAPABLE”. The raceway termination location shall be permanently and visibly marked as “EV CAPABLE”.

    4.106.4.2 New multifamily dwellings, hotels and motels and new residential parking facilities. When parking is provided, parking spaces for new multifamily dwellings, hotels and motels shall meet the requirements of Section 4.106.4.2.2. 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.

    4.106.4.2.1 Reserved.

    4.106.4.2.2 Multifamily dwellings.

    1. EV ready parking spaces with receptacles. a. Multifamily 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.
    2. 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. 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. b. Multifamily 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.
  • § 4.106.3 High relevance — show source text

    (Website: https://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.html)

    4.106.3 Grading and paving. Construction plans shall indicate how the site grading or drainage system will manage all surface water flows to keep water from entering buildings. Examples of methods to manage surface water include, but are not limited to, the following:

    1. Swales

    2. Water collection and disposal systems

    3. French drains

    4. Water retention gardens

    5. Other water measures which keep surface water away from buildings and aid in groundwater recharge.

    Exception: Additions and alterations not altering the drainage path.

    4.106.4 Electric vehicle (EV) charging for new construction. New construction shall comply with Section 4.106.4.1 or 4.106.4.2. Electric vehicle supply equipment (EVSE) shall comply with the California Electrical Code.

    Exceptions:

    1. On a case-by-case basis, where the local enforcing agency has determined EV charging and infrastructure are not feasible based upon one or more of the following conditions: 1.1. Where there is no local utility power supply or the local utility is unable to supply adequate power.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 4-3

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    RESIDENTIAL MANDATORY MEASURES

    1.2. Where there is evidence suitable to the local enforcing agency substantiating that additional local utility infrastructure design requirements, directly related to the implementation of Section 4.106.4, may adversely impact the construction cost of the project. 2. Accessory Dwelling Units (ADU) and Junior Accessory Dwelling Units (JADU) without additional parking facilities.

    4.106.4.1 New one- and two-family dwellings and townhouses with attached private garages. For each dwelling unit, install a listed raceway to accommodate a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service 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 service panel and/or subpanel shall provide capacity to install a 40-ampere 208/240-volt minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.

    Exception: A raceway is not required if a minimum 40-ampere 208/240-volt dedicated EV branch circuit is installed in close proximity to the proposed location of an EV charger at the time of original construction in accordance with the California Elec- trical Code .

    4.106.4.1.1 Identification. The service panel or subpanel circuit directory shall identify the overcurrent protective device space(s) reserved for future EV charging as “EV CAPABLE”. The raceway termination location shall be permanently and visibly marked as “EV CAPABLE”.

  • § 106.8 High relevance — show source text
    1. Use open grid pavement system or pervious or permeable pavement system.
    2. Locate 50 percent of parking underground or use multilevel parking.
    3. Other methods of reducing heat island effects acceptable to the enforcing agency.

    Note: Local agencies may have ordinances requiring mitigation of heat island effects through building or parking lot shading, tree plantings, landscaping, use of pervious pavements and other approved methods.

    A4.106.8 Electric vehicle (EV) charging for new construction. New construction shall comply with Section A4.106.8.1 or A4.106.8.2, to facilitate the installation and use of EV ready spaces. Electric vehicle supply equipment (EVSE) shall comply with the California Electrical Code .

    A4.106.8.1 New one- and two-family dwellings and townhouses with attached private garages.

    Tier 1 and Tier 2. For each dwelling unit, a dedicated 208/240-volt branch circuit shall be installed in the raceway required by Section 4.106.4.1. The branch circuit and associated overcurrent protective device shall be rated at 40 amperes minimum. Other electrical components, including a receptacle or blank cover, related to this section shall be installed in accordance with the California Electrical Code.

    A4.106.8.1.1 Identification. The service panel or subpanel circuit directory shall identify the overcurrent protective device designated for future EV charging purposes as “EV READY” in accordance with the California Electrical Code. The receptacle or blank cover shall be identified as “EV READY.”

    A4.106.8.2 New multifamily dwellings, hotels and motels. New multifamily dwellings, hotels and motels shall meet the following requirements.

    A4.106.8.2.1 Multifamily dwellings, hotels and motels.

    Tier 1. New multifamily dwellings, hotels and motels.

    1. EV ready parking spaces with receptacles. a. Hotels and motels. Sixty (60) percent of the total number of parking spaces shall be equipped with low power Level 2 EV charging receptacles. b. Raceway capacity requirements. To allow for future upgrades to the electrical conductors serving low power Level 2 EV charging receptacles, the listed raceway serving such receptacles shall be sized to allow

    APPENDIX A4-6 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

    the installation of a dedicated 208/240-volt 40-ampere branch circuit. Where no raceway is used, the conductors shall be sized to accommodate a 208/240-volt 40-ampere receptacle.

  • § 5.106.5.6 High relevance — show source text

    000 to 256,000|1 or 2|200| |Warehouse|20,000 to 256,000|3 or Greater|400| |Warehouse|Greater than 256,000|1 or Greater|400|

    5.106.5.6 Electric vehicle (EV) charging at public schools and community colleges. [DSA-SS] Electric vehicle infrastructure and electric vehicle charging stations shall comply with Section 5.106.5.6 and shall be provided in accordance with regulations in the California Building Code and the California Electrical Code.

    Exceptions:

    1. On a case-by-case basis where compliance with this section has been demonstrated to be not feasible based upon one of the following conditions, and with concurrence by the Division of the State Architect (DSA), compliance with Section 5.106.5.6 shall not be required. a. Where there is no local utility power supply. b. Where the local utility is unable to supply adequate power. c. The installation of EVCS is impracticable.
    2. Parking spaces accessible only by automated mechanical car parking systems are not required to comply with Section 5.106.5.6.

    5.106.5.6.1 EV capable spaces. EV capable spaces shall be provided in accordance with Table 5.106.5.6.1 and the following requirements:

    1. Raceways complying with the California Electrical Code and no less than 1-inch (25 mm) diameter shall be provided and shall originate at a service panel or a subpanel(s) serving the area and shall terminate in close proximity to the

    5-8 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    NONRESIDENTIAL MANDATORY MEASURES

    proposed location of the EV capable space and into a suitable listed cabinet, box, enclosure or equivalent. A common raceway may be used to serve multiple EV capable spaces. 2. A service panel or subpanel(s) shall be provided with panel space and electrical load capacity for a dedicated 208/240 volt, 40-ampere minimum branch circuit for each EV capable space, with delivery of 30-ampere minimum to an installed EVSE at each EVCS.

    1. The electrical system and any on-site distribution transformers shall have sufficient capacity to supply full rated amperage at each EV capable space.
    2. The service panel or subpanel circuit directory shall identify the reserved overcurrent protective device space(s) as “EV CAPABLE.” The raceway termination location shall be permanently and visibly marked as “EV CAPABLE.”
    TABLE 5.106.5.6.1 Col2 Col3
    TOTAL NUMBER OF PARKING SPACES NUMBER OF REQUIRED EV CAPABLE SPACES NUMBER OF REQUIRED EVCS2
    0–9 0 0
    10–25 4 1
    26–50 8 2
    51–75 13 3
    76–100 17 4
    101–150 25 6
    151–200 35 9
    201 and over 20 percent of total1 25 percent of EV capable spaces1
    1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.    		 1.
  • § 106.5.4 High relevance — show source text

    APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

    A4.106.5.4 Verification. Inspection shall be conducted to ensure roofing materials meet cool roof aged solar reflectance and thermal emittance or SRI values.

    A4.106.6 Vegetated roof. Install a vegetated roof for at least 50 percent of the roof area. Vegetated roofs shall comply with requirements for roof gardens and landscaped roofs in the California Building Code, Chapter 15 and Chapter 16.

    A4.106.7 Reduction of heat island effect for nonroof areas. Reduce nonroof heat islands for 50 percent of sidewalks, patios, driveways or other paved areas by using one or more of the methods listed.

    1. Trees or other plantings to provide shade and that mature within 15 years of planting. Trees should be native or adaptive to the region and climate zones and noninvasive; hardy and resistant to drought, insects and disease; easy to maintain (no frequent shedding of twigs, branches, unwanted fruit or seed pods); and suitable in mature size and environmental requirements for the site. Tree selection and placement should consider location and size of areas to be shaded, location of utilities, views from the structure, distance to sidewalks and foundations, overhangs onto adjacent properties and streets; other infrastructure and adjacent to landscaping. In addition, shading shall not cast a shadow, as specified, on any neighboring solar collectors pursuant to Public Resources Code Section 25981, et seq. (Solar Shade Control Act).
    2. Use high albedo materials with an initial solar reflectance value of at least 0.30 as determined in accordance with American Society for Testing and Materials (ASTM) Standards E1918 or C1549.
    3. Use open grid pavement system or pervious or permeable pavement system.
    4. Locate 50 percent of parking underground or use multilevel parking.
    5. Other methods of reducing heat island effects acceptable to the enforcing agency.

    Note: Local agencies may have ordinances requiring mitigation of heat island effects through building or parking lot shading, tree plantings, landscaping, use of pervious pavements and other approved methods.

    A4.106.8 Electric vehicle (EV) charging for new construction. New construction shall comply with Section A4.106.8.1 or A4.106.8.2, to facilitate the installation and use of EV ready spaces. Electric vehicle supply equipment (EVSE) shall comply with the California Electrical Code .

    A4.106.8.1 New one- and two-family dwellings and townhouses with attached private garages.

    Tier 1 and Tier 2. For each dwelling unit, a dedicated 208/240-volt branch circuit shall be installed in the raceway required by Section 4.106.4.1. The branch circuit and associated overcurrent protective device shall be rated at 40 amperes minimum. Other electrical components, including a receptacle or blank cover, related to this section shall be installed in accordance with the California Electrical Code.

    A4.106.8.1.1 Identification. The service panel or subpanel circuit directory shall identify the overcurrent protective device designated for future EV charging purposes as “EV READY” in accordance with the California Electrical Code. The receptacle or blank cover shall be identified as “EV READY.”

    A4.106.8.2 New multifamily dwellings, hotels and motels. New multifamily dwellings, hotels and motels shall meet the following requirements.

  • § 0.40. High relevance — show source text

    SINGLE-FAMILY RESIDENTIAL BUILDINGS— MANDATORY FEATURES AND DEVICES

    1. Filters. Filters shall be at least the size specified in NSF/ANSI 50 for public pool intended applications.
    2. Valves. Minimum diameter of backwash valves shall be 2 inches or the diameter of the return pipe, whichever is greater.

    (q) Fenestration products. Fenestration, including skylight products, separating conditioned space from unconditioned space or outdoors shall have a maximum weighted average U -factor of 0.40.

    Exception 1 to Section 150.0(q): Up to 10 square feet of fenestration area or 0.5 percent of the conditioned floor area, whichever is greater, is not required to comply with the maximum U -factor requirement.

    Exception 2 to Section 150.0(q): For dual-glazed greenhouse or garden windows, up to 30 square feet of fenestration area is not required to comply with the maximum U -factor requirement.

    Exception 3 to Section 150.0(q): Fenestration installed in buildings meeting Part 7 of the California Building Code, California Wildland-Urban Interface Code, where the building is located in Fire Hazard Severity Zones or Wildland-Urban Interface (WUI) Fire Areas as designated by the local enforcement agency.

    (r) Solar ready buildings. shall meet the requirements of Section 110.10 applicable to the building project.

    (s) Battery Energy Storage Systems (BESS) ready. All single-family residences that include one or two dwelling units, which a load-serving entity provides with electrical service for the dwelling unit that is greater than 125 amps, shall meet the following.

    1. At least one of the following shall be provided: A. BESS-ready interconnection equipment with a minimum backed-up capacity of 60 amps and a minimum of four BESS-supplied branch circuits specified in Section 150.0(s)2, or B. A dedicated raceway from the main service to a panelboard (subpanel) that supplies the branch circuits in Section 150.0(s)2. All branch circuits are permitted to be supplied by the main service panel prior to the installation of a BESS. The trade size of the raceway shall be not less than 1 inch. The panelboard that supplies the branch circuits (subpanel) must be labeled “Subpanel shall include all backed-up load circuits.”
    2. A minimum of four branch circuits shall be identified and have their source of supply collocated at a single panelboard suitable to be supplied by the BESS. At least one circuit shall supply the refrigerator, one lighting circuit shall be located near the primary egress and at least one circuit shall supply a sleeping room receptacle outlet.
    3. The main panelboard shall have a minimum busbar rating of 225 amps.
    4. Sufficient space shall be reserved to allow future installation of a system isolation equipment/transfer switch within 3 feet of the main panelboard. Raceways shall be installed between the panelboard and the system isolation equipment/transfer switch location to allow the connection of backup power source.

    Exception to Section 150.0(s): Buildings which have a BESS installed.

  • § 5-6 High relevance — show source text

    For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.|

    5-6 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    NONRESIDENTIAL MANDATORY MEASURES

    5.106.5.3.6.1 Receptacle configurations. 208/240V 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 14-30R.
    3. For 50-ampere receptacles, NEMA 14-50R.

    5.106.5.3.6.2 EV Charger connectors. EV chargers shall be equipped with SAE J1772 with a maximum output 240 Volts AC or SAE J3400 connectors. When using level 2 SAE J3400 connectors, supplied by a 480 V 3-phase service, at least 20 percent of the EV charger connectors shall be SAE J1772 with a maximum output 240 Volts AC.

    5.106.5.3.6.3 Raceway capacity requirements. To allow for future upgrades to the electrical conductors serving low power Level 2 charging receptacles, the listed raceway serving such receptacles shall be sized to allow the installation of a dedicated 208/240-volt 40-ampere branch circuit. Where no raceway is used, the conductors shall be sized to accommodate a 208/240-volt 40-ampere receptacle.

    5.106.5.4 Additions or alterations to existing buildings or parking facilities [A]. [BSC-CG] Existing buildings or parking facilities being modified by one of the following shall comply with Section 5.106.5.4.1 or 5.106.5.4.2. When EVSE is installed, accessible EVCS shall be provided in accordance with the California Building Code, Chapter 11B, Section 11B-228.3.

    1. When the scope of construction work includes an increase in power supply to an electric service panel as part of a parking facility addition or alteration.
    2. When a new photovoltaic system is installed covering existing parking spaces.
    3. When additions or alterations to existing buildings are triggered pursuant to code Section 301.3 and the scope of work includes an increase in power supply to an electric service panel.

    Exceptions:

    1. On a case-by-case basis where the local enforcing agency has determined compliance with this section is not feasible based upon one of the following conditions: a. Where there is no local utility power supply. b. Where the local utility is unable to supply adequate power. c. Where there is evidence suitable to the local enforcement agency substantiating that additional local utility infrastructure design requirements, directly related to the implementation of Section 5.106.5.3, may adversely impact the construction cost of the project. d. Where demonstrated as impracticable excluding local utility service or utility infrastructure issues.
    2. Remote parking facilities that do not have access to the building service panel.
    3. Parking area lighting upgrades where no trenching is part of the scope of work.
    4. Emergency repairs, including but not limited to water line break in parking facilities, natural disaster repairs, etc.
  • § 5.106.5.3.1 High relevance — show source text

    Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.
    4. If EV capable spaces are utilized, they shall meet the requirements of Section 5.106.5.3.1 EV capable spaces.
    5. For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.|1. Level 2 EVSE @ 6.6 kVA minimum.
    2. At least one Level 2 EVSE shall be provided.
    3. Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.
    4. If EV capable spaces are utilized, they shall meet the requirements of Section 5.106.5.3.1 EV capable spaces.
    5. For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.|

    A5.106.5.3.3 Tier 2. Comply with Section 5.106.5.3.1 EV capable spaces, Section 5.106.5.3.2 Electric vehicle charging stations and associated Table A5.106.5.3.3, or Section A5.106.5.3.4 Electric vehicle charging stations (EVCS)—power allocation method and associated Table A5.106.5.3.4.

    Refer to Section 5.106.5.3.2 for the permitted use of Level 2 or Direct Current Fast Charger (DCFC) to create EVCS. Refer to Section 5.106.3.2.1 for the allowed use of DCFC to comply with both EV capable spaces and Level 2 EVSE. Refer to Section 5.106.5.3.3 for the allowed use of Automatic Load Management System (ALMS).

    TABLE A5.106.5.3.3—TIER 2 EV CAPABLE SPACES AND EVCS Col2 Col3 Col4
    TOTAL NUMBER OF
    ACTUAL PARKING SPACES    		 NUMBER OF
    REQUIRED EV CAPABLE SPACES    		 OTHER THAN OFFICE AND RETAIL
    NUMBER OF REQUIRED EVCS2, 3    		 OFFICE AND RETAIL
    NUMBER OF REQUIRED EVCS2, 3
    1–9 3 2 2
    10–25 8 4 6
    26–50 17 9 13
    51–75 28 14 21
    76–100 40 20 30
    101–150 57 29 43
    151–200 79 40 59
    201 and over 45 percent of actual parking spaces1 50 percent of EV capable spaces1 75 percent of EV capable spaces1
    1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1. Calculation for spaces shall be rounded up to the nearest whole number.
    2. Each EVCS shall reduce the number of required EV capable spaces by the same number.
    3. At least one Level 2 EVSE shall be provided.    		 1.
  • § 106.5.3.2 High relevance — show source text

    Power allocation method shall include the following:

    1. Use any kVA combination of EV capable spaces, low power Level 2, Level 2 or DCFC EVSEs.
    2. At least one Level 2 EVSE shall be provided.
    TABLE A5.106.5.3.2—TIER 1 EVCS—POWER ALLOCATION METHOD Col2 Col3 Col4
    TOTAL NUMBER OF
    ACTUAL PARKING SPACES    		 MINIMUM TOTAL kVA
    @ 6.6 kVA    		 OTHER THAN OFFICE AND RETAIL
    TOTAL kVA REQUIRED
    IN ANY COMBINATION OF EV
    CAPABLE3, 4, LOW POWER LEVEL 2
    LEVEL 21, 2, OR DCFC    		 OFFICE AND RETAIL
    TOTAL kVA REQUIRED
    IN ANY COMBINATION OF EV
    CAPABLE3, 4, LOW POWER LEVEL 2
    LEVEL 21, 2, OR DCFC
    1–9 13.2 13.2 13.2
    10–25 33 33 33
    26–50 72.6 72.6 72.6
    51–75 125.4 125.4 125.4
    76–100 171.6 171.6 171.6
    101–150 250.8 250.8 250.8
    151–200 349.8 349.8 349.8
    201 and over 30 percent of
    actual parking spaces× 6.6    		 Total required kVA = P× .30× 6.6
    Where P = Parking spaces in facility    		 Total required kVA = P× .30× 6.6
    Where P = Parking spaces in facility
    1. Level 2 EVSE @ 6.6 kVA minimum.
    2. At least one Level 2 EVSE shall be provided.
    3. Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.
    4. If EV capable spaces are utilized, they shall meet the requirements of Section 5.106.5.3.1 EV capable spaces.
    5. For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.    		 1. Level 2 EVSE @ 6.6 kVA minimum.
    2. At least one Level 2 EVSE shall be provided.
    3. Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.
    4. If EV capable spaces are utilized, they shall meet the requirements of Section 5.106.5.3.1 EV capable spaces.
    5. For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.    		 1. Level 2 EVSE @ 6.6 kVA minimum.
    2. At least one Level 2 EVSE shall be provided.
    3. Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.
    4. If EV capable spaces are utilized, they shall meet the requirements of Section 5.106.5.3.1 EV capable spaces.
    5. For office and retail buildings the maximum allowed kVA to be utilized for EV capable spaces is 25 percent.    		 1.

Frequently asked questions

Do I have to install conduit if I run a 40 A branch circuit now?

No — the code includes a specific exception: if a minimum 40‑ampere 208/240‑volt dedicated branch circuit is installed in close proximity to the proposed charger location at time of construction (and installed per the California Electrical Code), the raceway is not required. § 4.106.4.1 (Exception).

What exact label text is required on the panel and raceway?

The mandatory labeling text required by the code is “EV CAPABLE” for both the reserved overcurrent protective device space(s) in the circuit directory and the raceway termination location. § 4.106.4.1.1.

How big must the conduit be?

Minimum trade size 1 (nominal 1‑inch inside diameter). § 4.106.4.1.

Does the code require me to size my service for multiple chargers?

For single‑family dwellings the requirement is to reserve panel space and capacity for a 40 A 208/240 V dedicated branch circuit per dwelling unit; broader service‑capacity calculations for multiple EVCS are addressed in other sections (e.g., nonresidential/multifamily provisions). See § 4.106.4.1 and related nonresidential sections for multi‑space calculations. file

Is the Appendix wording mandatory?

No. Appendix A (for example, A4.106.8.1.1 using “EV READY”) provides voluntary guidance. The mandatory residential requirement uses the “EV CAPABLE” wording in § 4.106.4.1.1. file

More in California Energy Code

Ask about the California Energy Code

Get cited, plain-English answers on the California Energy Code for your project — any code section, any scenario.

Start Free Trial

Related in the California Energy Code

How many receptacles/chargers are required in multifamily parking and when can ALMS reduce capacity?

What receptacle configurations, connector types and raceway sizing are required for residential EV readiness?

Residential EV readiness & parking

California Energy Code