Home Addition Electrical Wiring Cost in Kansas City (2026)

A bedroom addition (outlets, lighting, smoke detectors) is straightforward. Basements, kitchens, and ADUs require dedicated circuits, GFCI/AFCI protection, appliance circuits, and more — significantly increasing scope and cost.

Your existing panel must have enough capacity to support the addition's electrical load. Many older KC homes run 100A panels that are already near capacity — a panel upgrade ($1,800–$3,500+) may be needed before addition wiring can begin.

ADUs, in-law suites, and detached garages/shops typically require their own subpanel. This means a dedicated feeder circuit from the main panel — underground conduit if the structure is detached. Subpanel installation adds $1,200–$2,500+ to the project.

Electrical rough-in must happen at the right time in the construction sequence — after framing, before insulation and drywall. We coordinate directly with your general contractor to hit the schedule and avoid delays.

New construction and additions must meet current NEC code (adopted by both Missouri and Kansas). This includes AFCI breakers in living areas, tamper-resistant outlets, smoke/CO detector wiring, and proper grounding — all included in our scope.

All addition electrical work requires permits and inspection by the local Authority Having Jurisdiction. KC metro cities (KCMO, Overland Park, Lee's Summit, etc.) all have different requirements. We handle everything — always included in our estimate.