Most Seattle homes built after 1995 are on 200A panels with breaker space for a 50-amp EV charger circuit. Install is a half-day project: pull the permit, run conduit from panel to garage, land the new breaker, install the charger, schedule the city inspection.
The complication is panel capacity. Pre-1990 homes with original 100A panels are usually already at or near capacity. Adding a 50A EV circuit pushes them over. Two paths: panel upgrade ($2,800-$4,500) OR a smart load-management device ($400-$800) that throttles the EV charger when household demand is high.
For Tesla-only households, the Tesla Wall Connector ($395) is the cheapest and best charger. For mixed-EV households (or future-proofing), universal J1772 chargers like Wallbox Pulsar Plus ($649) or ChargePoint Home Flex ($699) are the right call.