Homeowners across Seattle, Bellevue, Kirkland, Redmond, Bothell, and Lynnwood ask the same question before a remodel or EV install: Do I need a 200-amp panel, or is 100 amps enough?
Here’s a practical way to think about 100-amp vs 200-amp electrical panel upgrade decisions—without treating every house the same.
Need a capacity answer for your panel? Schedule a free assessment.
What the Main Breaker Number Means
The large main breaker (often labeled 100, 150, or 200) is a major clue to how much power your home can draw at once from the utility service. It’s not the only factor—but it’s the starting point most inspectors and electricians discuss.
When 100-Amp Service Struggles
100-amp service can still work for modest homes—but it often becomes tight when you add:
- Level 2 EV charging
- Heat pump or electric furnace upgrades
- Large range + dryer + water heat
- ADU or shop loads
- Hot tub or EV + remodel combo
In many mid-century Greater Seattle homes, a 200-amp upgrade is the clean long-term path.
When 200-Amp Makes Sense
Choose planning toward 200A when you:
- Expect electrification over the next 5–10 years
- Want EV readiness without maxing the panel
- Are doing a major kitchen/bath remodel
- Received inspection or appraisal notes about capacity
- Want more breaker spaces and modern safety devices
See the full panel upgrade guide for Greater Seattle.
Load Calculation Beats Guesswork
A licensed electrician will:
- Inventory major appliances
- Review continuous loads (including EVSE if planned)
- Check panel condition and grounding
- Recommend upgrade vs right-sized circuits
Two homes with “200A panels” can have very different available capacity depending on what’s already connected.
Greater Seattle Context
We see 100A services frequently in older Seattle neighborhoods and some Eastside ranch homes; newer Bellevue, Redmond, and Mill Creek builds more often start at higher service sizes—but full panels still happen after remodels.
Cities we serve for panel evaluations include Seattle, Bellevue, Redmond, Kirkland, Bothell, Woodinville, Shoreline, Edmonds, Everett, Renton, and more: service area directory.
Schedule a 100A vs 200A Panel Review
Bring photos of your panel if you have them—we’ll still want a site visit for a final recommendation.
Schedule free estimate · 360-668-9540 · Panel services · EV + panel planning
Related: Circuit breaker keeps tripping · AFCI/GFCI upgrades