Replacing a fuse box with a modern breaker panel typically costs $1,500 to $6,500, including permits and code compliance. Most of the cost comes from the panel size and whether your home needs a service upgrade. This work should be done by licensed electricians; we handle permitting and inspection, and most upgrades finish in about 6–10 hours in one day. We regularly perform these upgrades across the Denver metro, including Littleton.
What drives price and timeline:
- Service capacity increase (100A to 200A or higher).
- Panel relocation or service mast/meter upgrades.
- Grounding, bonding, and required AFCI/GFCI protections.
- Condition of existing wiring and adding dedicated circuits (EV or major appliances).
Schedule an in-home evaluation to confirm scope and get an upfront flat-rate before work starts.
Updated: 2026-08-22
Need help in Littleton, CO? Call (720) 577-4266 or book online. "They replaced our entire electrical panel — a major job — and had it all completed in just one day... left us feeling safe and confident with our new setup." — Monica O.