Electrical
Sub-Panel Installation
When one part of your home needs more circuits — a shop, an ADU, a remodel, a detached garage — a sub-panel puts that capacity where the load lives instead of crowding your main panel. Eco's licensed electricians size, install, and permit sub-panels that keep your electrical system organized and ready for what's next.
What's included
Complete sub-panel installation from one licensed, family-owned team across the Puget Sound.
- Sub-panel sizing for the loads it will serve
- Feeder wiring from the main panel
- Garage, shop, ADU, and addition sub-panels
- Breaker layout and clear circuit labeling
- Main panel capacity assessment first
- Permitting and inspection handled
Signs it's time to call
Why choose Eco
One licensed company for electrical, plumbing, and HVAC — no juggling multiple contractors.
Upfront, flat-rate pricing approved before any work begins — no surprises.
Background-checked, drug-tested technicians who treat your home like their own.
Same-day and emergency availability across the greater Seattle / Puget Sound area.
Sub-Panel Installation FAQs
What does a sub-panel cost?
Adding a sub-panel typically runs $1,500–$3,500 in the Puget Sound, depending on its size, the feeder run, and access. You approve an exact flat-rate price before any work begins — see our electrical panel cost guide for context.
Sub-panel or a full panel upgrade — which do I need?
If your main panel has capacity but no space (or the new loads are far away), a sub-panel is the efficient answer. If the service itself is undersized or the panel is an obsolete hazard brand, an upgrade comes first. We assess your panel honestly before recommending either.
Does a sub-panel add total electrical capacity?
No — it redistributes the capacity your service already has. That's why we start with a capacity assessment: if your home genuinely needs more power (EV charger, heat pump, addition), the conversation may include a service upgrade.
Do sub-panels need permits?
Yes. Sub-panel installation is permitted, inspected electrical work, and we handle the paperwork and inspection so the installation is safe and documented.
Go deeper
The guides, cost ranges, and service hubs most useful alongside sub-panel installation.
Need sub-panel installation? Let's get it handled.
Book online 24/7 or talk to our team — you'll get a clear, upfront price before any work begins.