Will my home need a new service for an EV charger?
A new service is not required for every EV charger. The electrician should assess the charger with existing and planned household loads, then determine the circuit, panel space, route and whether an accepted load-management option applies.
- A subpanel adds room for circuits but does not increase utility service capacity.
What should an EV charger estimate cover?
An EV charger estimate should name the charger or connection equipment, location, circuit, route, permit, panel changes and restoration. A garage beside the panel involves different work from detached parking.
- Include another EV, heat pump or water-heater conversion in the planned-load review.
How do I include the utility in the project?
Utility steps depend on the electric provider at your address: PSE may require notification when adding EV charging, while Tacoma Power sends added loads to engineering review. Your electrician and inspection authority determine the final design and permit process.
What is useful to decide before the site visit?
Describe where the vehicle parks, the desired equipment location and whether the route crosses finished walls, exterior surfaces or a detached structure. Share any selected charger model and the household’s other planned equipment.
- The contractor can then investigate the circuit and load options rather than quoting an undefined charger allowance.
- Confirm whether the estimate covers equipment supply as well as electrical installation, and how a change in charger model would affect the agreed design and price.
Sources and scope
Primary-source research reviewed October 17, 2026 for ev charger installation and electrical panel upgrades. Code, utility standards and administrative guidance have different roles. Confirm current requirements for the project address.