Commercial · Franklin County & St. Louis, MO
CAS Electric provides commercial electrical services for small businesses, offices, retail spaces, restaurants, and light industrial across Franklin County and the Greater St. Louis area — Pacific, Washington, Union, Sullivan, St. Clair, Eureka, Wildwood, Villa Ridge, and Marthasville. Owner-operated, licensed, and insured — with the responsiveness a small business needs.
Commercial electrical work is different from residential in every way that matters: bigger services (often 3-phase), harder loads (HVAC compressors, ovens, refrigeration, machinery), stricter code requirements (egress lighting, emergency circuits, exit signs), and zero tolerance for downtime.
We work with small and mid-size businesses across Franklin County and Greater St. Louis. Our sweet spot is the 1,000–15,000 sq ft space — the office suite, the retail storefront, the neighborhood restaurant, the small warehouse or shop. We handle service work, tenant improvements, equipment hookups, lighting retrofits, and code corrections.
Because we're owner-operated, you get a licensed electrician on the phone when something goes wrong — not a scheduler three days out. We'll come out, diagnose, quote, and get you back up.
Commercial service calls and project work (tenant finishes, equipment installs, lighting retrofits) are quoted with a written estimate before work begins — flat-rate whenever possible, so there are no hourly surprises.
We meet you on-site, look at the panel and equipment, and understand your operating hours and constraints.
You get a clear itemized scope, timeline, and price — no vague T&M estimates.
After-hours, early morning, weekends — whenever least disrupts your business.
Local inspector signs off, we walk you through what changed, and hand you clean paperwork for your files.
Yes — 3-phase service work, motor starts, HVAC hookups, and 3-phase panel changes are all standard for us.
Yes. Retail, restaurants, and offices often need work done evenings, early mornings, or weekends. We schedule around your operating hours.
Yes. If a commercial inspection has flagged items — GFCI outlets in wet areas, missing egress signage, panel labeling, working-clearance issues — we handle the punch list and coordinate the re-inspection.
That's most of our commercial work. We're not the right contractor for a 250,000 sq ft big-box — but for the 1,000–15,000 sq ft space that needs a real electrician on-site fast, we're exactly the right fit.
Yes. We pull commercial permits, meet inspectors on-site, and handle any punch-list items to get the job signed off.
Licensed, insured, owner-operated. We respond to all estimates within 1 business day.