Residential · Franklin County & St. Louis, MO
If your home has knob-and-tube wiring, cloth-jacketed cable, aluminum branch circuits, or two-prong outlets throughout, a rewire brings it up to modern safety standards. CAS Electric handles whole-home and partial rewires across Franklin County and the Greater St. Louis area — Pacific, Washington, Union, Sullivan, St. Clair, Eureka, Wildwood, Villa Ridge, and Marthasville — carefully, cleanly, and with as little drywall damage as possible.
Homes wired before the 1970s in the St. Louis area often still have some combination of knob-and-tube (pre-1950), cloth-jacket NM cable (1950s–60s), or aluminum branch wiring (mid-1960s–mid-1970s). Each has its own failure modes: knob-and-tube can't handle modern loads and doesn't tolerate insulation contact; cloth-jacket insulation gets brittle and crumbles at devices; aluminum branch wiring expands and contracts at every screw termination and eventually loosens and arcs.
Rewiring doesn't have to mean tearing down every wall. We use fish-tape and drill-and-pull techniques to route new copper NM through existing wall cavities from attics, basements, and crawl spaces. Where drywall has to come out, we coordinate patching. The result is a fully modern electrical system in an older home — grounded three-prong outlets everywhere, AFCI and GFCI protection to code, and an insurance-friendly panel.
Many rewires can be phased — kitchen and baths first, then bedrooms, then the rest — so you can budget across a couple of years without living without power. We'll help you think through the sequence.
Rewire pricing depends on home size, wall access, and finish level. Partial rewires (kitchen/baths only, or aluminum-branch pigtailing) can be phased to spread cost over time. We provide a free written estimate scoped to your home.
We map what's actually in your walls (mixed wiring is common) and identify which circuits are the highest priority.
You get a phased plan and price — usually kitchen/baths first, then bedrooms, then the rest.
New copper NM cable pulled from attic/basement/crawl to each device, new boxes as needed, panel tie-in at the end of each phase.
Inspector signs off on each phase; drywall patching coordinated as needed.
Knob-and-tube shows up as ceramic knobs and tubes in an unfinished attic or basement, with two separate cloth-covered conductors. Aluminum branch wiring is silver-colored inside a receptacle box (as opposed to copper's orange) and is stamped 'AL' on the cable jacket. We'll do a survey and confirm exactly what you have.
Usually no. We work in phases — one room at a time or one circuit at a time — so you keep power in the rest of the house. Kitchens and baths sometimes have a day or two of inconvenience during trim-out.
We work from attics, basements, and crawl spaces to minimize wall openings. Some patching is almost always necessary at box locations, but on a typical rewire it's a manageable amount of touch-up work.
Sometimes — for example, a run of newer copper NM added during a 1990s remodel might be fine to leave. We evaluate each circuit and only rewire what actually needs it.
Increasingly, yes. Many carriers now require documented rewires or aluminum-branch remediation to keep coverage on older homes. We provide clean, itemized invoices you can hand your agent.
Licensed, insured, owner-operated. We respond to all estimates within 1 business day.