If you are developing or substantially renovating commercial property in a growing number of states, EV infrastructure is no longer optional, and the requirement attaches at the building department, not the incentive office. This matters because compliance is the floor and incentives are the upside; people who confuse the two miss both. Here is what is actually on the books, what triggers it, and how to plan a building that will not need an expensive retrofit in its first code cycle.
Three tiers, not two
Codes use three escalating levels. Knowing which tier applies to your project changes the cost by an order of magnitude.
EV-capable
The lowest tier. The code requires the raceway and panel headroom to add charging later: conduit or raceway from the panel to the stall, plus reserved electrical capacity. No wiring is pulled and no charger is installed. This is the cheapest tier to satisfy in new construction, typically a small fraction of project cost, because trenching and panel sizing are far cheaper before the slab is poured.
EV-ready
The middle tier. The branch circuit is actually run to the stall and terminated (a receptacle or junction box), so a charger can be mounted on a "plug and play" basis with no further electrical work. More expensive than capable, far cheaper than retrofitting later.
EVSE-installed
The top tier. Operational charging equipment must be installed and energized at some share of spaces. This is the most demanding and the direction codes are trending.
A single project often carries different tiers at once: a percentage of spaces installed, a larger percentage EV-ready, and the balance EV-capable.
States with active requirements (as of October 2026)
As of December 2024, by the count the Pacific Northwest National Laboratory keeps for the U.S. Department of Energy, 12 states had added EV provisions to building codes, local ordinances, or zoning: California, Oregon, Washington, Colorado, New Mexico, Illinois, Maryland, Delaware, New Jersey, Rhode Island, Massachusetts, and Vermont, with the list growing. The detail below is limited to what is verifiable from primary and authoritative sources; treat anything not listed here as "check locally," not "no requirement."
California. The most comprehensive program, through the Title 24 Building Energy Efficiency Standards and CALGreen. New nonresidential construction with parking must provide a mix of EV-capable spaces and installed charging stations, and the 2025 code edition (effective January 1, 2026) raised the installed-EVSE share substantially for office, retail, and other nonresidential buildings. New multifamily is broadly EV-ready. See the dedicated California Title 24 article for the percentages and the 2025 changes.
Washington. State code (WAC 51-50-0429, in the code effective March 15, 2024) requires EV charging infrastructure at a defined share of parking spaces in qualifying new buildings, with a round-up rule. The general exception covers buildings or parking lots with fewer than 10 parking spaces, and Group A, E, and M occupancies get specific treatment under the rule rather than that general exception. That rule still governs permits today. The state's 2024 code edition is in rulemaking and is proposed to take effect May 3, 2027; the proposed text keeps the 10 percent shares for most nonresidential occupancies but changes the mix for larger multifamily buildings, cutting EV-ready spaces from 25 to 10 percent and raising EV-capable spaces from 10 to 40 percent. Confirm which edition, percentages, and local amendments govern your permit with the local building department.
Colorado. State law (HB22-1362) ties the state's energy code to local code updates. Jurisdictions that updated building codes between July 1, 2023 and July 1, 2026 had to adopt the 2021 IECC (or better) together with the state's model electric-ready and solar-ready code, which includes EV-ready requirements. A jurisdiction that updates any building code on or after July 1, 2026 must instead adopt the state's Model Low Energy and Carbon Code (or better), which keeps the electric-ready, EV-ready, and solar-ready requirements. Either way, EV-ready requirements arrive in a jurisdiction when it next refreshes its codes, so the requirement landscape is uneven across the state and worth checking jurisdiction by jurisdiction.
New Jersey. S3223 (2021) amended state land-use law to set numerical make-ready and EVSE requirements, carried into the state construction code at N.J.A.C. 5:23. For nonresidential developments the adopted schedule scales with lot size: at least one make-ready space for lots with more than 25 and up to 50 off-street spaces, two for 51 to 75, three for 76 to 100, four for 101 to 150, and 4 percent of spaces for lots with more than 150. Multifamily developments with five or more dwelling units must make 15 percent of spaces make-ready, and under the adopted rule one-third of those required make-ready spaces must have EVSE actually installed. The statute phases in the rest as a condition of site plan approval: EVSE in another third within three years of the certificate of occupancy and in the final third within six years. It also makes charging a permitted accessory use in all zoning districts, which removes a common zoning obstacle.
Massachusetts, Oregon, and others. Massachusetts includes EV provisions in its energy/stretch code for certain building types; Oregon has EV-ready requirements aligned conceptually with the West Coast approach; New Mexico, Illinois, Maryland, Delaware, Rhode Island, and Vermont each have provisions of varying tier and scope. The specifics differ enough by building type, edition, and local amendment that you should confirm the exact requirement with the authority having jurisdiction rather than rely on a national summary.
Local can exceed state. Cities such as Denver, Boulder, San Francisco, and Los Angeles have adopted requirements stricter than their state baseline. Always check the local amendment, not just the state code.
What about ZEV sales mandates and fleet rules?
Building codes are separate from vehicle and fleet rules, and the two are sometimes conflated. California's Advanced Clean Cars II set a ramp toward 100 percent zero-emission new vehicle sales by 2035, and several states had adopted it by reference. That program's legal footing shifted in 2025. Congress passed, and the President signed on June 12, 2025, Congressional Review Act resolutions disapproving California's Clean Air Act waivers for ACC II, the Advanced Clean Trucks rule, and a heavy-duty engine emissions rule. California and ten other states sued to overturn the resolutions; that case is still pending in federal court in California, with no ruling on the merits. In the meantime CARB has put its earlier vehicle emission standards back in force and lets automakers comply with ACC II voluntarily, and some states that adopted ACC II have stepped back on enforcement: Massachusetts is not enforcing the model year 2026 and 2027 sales requirements against automakers that meet its conditions, and Maryland will not pursue penalties for model year 2027 and 2028 shortfalls unless voluntary agreements cover at least 40 percent of its market. Fleet rules moved too. CARB's board voted in September 2025 to repeal the Advanced Clean Fleets requirements for drayage and high-priority (large private and federal) fleets and to push the 100 percent zero-emission purchase requirement for state and local government fleets to 2030, and California's Office of Administrative Law approved the package in September 2026. The upshot for a building project: vehicle and fleet mandates are in flux and litigated, but they do not directly impose building obligations. Your building obligations come from the building and energy codes above. Do not plan a building around a vehicle-sales rule, and do not assume a vehicle-rule rollback changes your construction code.
What triggers a building requirement
- New construction with parking (the most common trigger)
- Major renovation of an existing parking facility
- Adding significant parking capacity (for example, New Jersey and California thresholds tied to added spaces)
- A change of use that pulls the building into current-code compliance
Operational add-ons (mounting chargers without new construction) generally do not trigger building-code EV mandates, though they still require electrical permits and inspection.
Practical compliance checklist
- Confirm the jurisdiction's current code edition and amendments early in design. The state baseline is the starting point, not the answer.
- Check state plus local; the local amendment frequently governs.
- Plan for the next code cycle, not just today's minimum. A 30-year building will face stricter rules in year 10. The marginal cost of going one tier beyond the minimum during construction is small compared to retrofitting.
- Document compliance in the permit drawings and inspection records; that is your evidence.
- Keep compliance and incentives separate. Code is the floor. Incentive programs reward exceeding it, but qualifying for a rebate does not prove you met code, and meeting code does not earn you a rebate.
The direction of travel
The long-run trend is more states, higher tiers, and larger installed-EVSE percentages, though not every cycle moves in a straight line: Washington's proposed 2024 code trades some multifamily EV-ready spaces for more EV-capable ones, and Colorado's newest model code adds lower-cost options such as Level 1 spaces in multifamily buildings. California has tended to lead and other states follow within a few years, so building to the California approach in any jurisdiction is a reasonable hedge against where your local code is heading. Build past the minimum where the marginal cost is low, because the expensive moment is always the retrofit.
Last factually verified: 2026-10-03 against the California Energy Commission / CALGreen 2025 code materials, Washington Administrative Code Title 51 (WAC 51-50-0429) and the State Building Code Council's proposed 2024 adoption (WSR 26-10-068), Colorado HB22-1362 and Colorado Energy Office materials on the Model Low Energy and Carbon Code, New Jersey P.L.2021, c.171 (S3223) and N.J.A.C. 5:23-2.36, the U.S. DOE/PNNL EV charging code technical brief (December 2024), H.J.Res. 88 (Pub. L. 119-16) and the docket in California v. United States (N.D. Cal., No. 3:25-cv-04966), CARB releases on the Emergency Vehicle Emissions Regulations (March 26, 2026) and the Advanced Clean Fleets amendments (September 25, 2025), Maryland Executive Order 01.01.2025.10, and the MassDEP ACC II enforcement discretion notice (May 23, 2025). State-by-state detail not specifically cited here should be confirmed with the local authority having jurisdiction.
Corrections (August 11, 2026): This article previously said Washington's code excluded occupancies with under 20 parking spaces; the current rule's general exception (WAC 51-50-0429, code effective March 15, 2024) applies to buildings or parking lots with fewer than 10 parking spaces, with specific treatment for Group A, E, and M occupancies. It previously said New Jersey requires at least one make-ready space for nonresidential lots of 50 or fewer spaces; the adopted rule (N.J.A.C. 5:23) applies that requirement to lots with more than 25 and up to 50 spaces. It previously said the 15 percent multifamily make-ready requirement applies to buildings above five units; the adopted rule applies to buildings with five or more dwelling units, and one-third of the required make-ready spaces must have installed EVSE.
Corrections (October 3, 2026): This article previously said California's nonresidential code requires a mix of EV-capable and EV-ready spaces; the CALGreen nonresidential table requires EV-capable spaces and installed charging stations. It previously described New Jersey's multifamily rule as one-third of the make-ready spaces with installed EVSE; the statute (P.L.2021, c.171) requires the remaining two-thirds to be equipped within three and six years of the certificate of occupancy. It previously gave the Advanced Clean Fleets repeal as effective in 2027; the state Office of Administrative Law approved it in September 2026.
