Whole-Home Rewiring in DC, Maryland & Virginia

Knob-and-Tube, Cloth Wiring & Other Legacy Systems

Knob-and-tube wiring was the standard in U.S. homes built roughly between 1880 and 1940. It has no ground conductor, relies on air gaps for heat dissipation, and becomes dangerous the moment it gets buried under modern blown-in insulation - which is exactly what's happened in most older DMV homes that have been weatherized over the last twenty years.

Homes built in the 1950s and 1960s usually have early NM cable with cloth or rubber insulation. The insulation gets brittle, crumbles when you flex it at a device box, and exposes bare copper inside the wall. A handful of homes from that era also have early aluminum branch circuits - a separate, well-documented hazard we handle through our aluminum wiring remediation practice.

Most major insurance carriers writing policies in Maryland, DC, and Virginia will not write or renew a homeowner's policy on a house with active knob-and-tube or deteriorated cloth wiring. A documented rewire is often the only path back to coverage.

How a Whole-Home Rewire Actually Works

A rewire is staged room by room, not blown through the whole house at once. We sequence the work - typically kitchen and primary bath first, then bedrooms, then living spaces - so power stays on in occupied parts of the home overnight. Most clients live in the home during the work; we coordinate which circuits are dark on which day so you can plan around the fridge, Wi-Fi, and bedrooms.

In finished homes with plaster or drywall, the goal is to fish new cable through existing wall cavities with the minimum number of access holes - typically one or two small openings per circuit, cut cleanly and left drywall-trade-ready. In gut renovations or homes with open basements and accessible attics, we run new homeruns directly to a new or existing panel.

Most single-family whole-home rewires in the DMV take one to three weeks of on-site work, depending on square footage, wall construction (plaster is slower than drywall), how many circuits exist, and whether the panel and service entrance need to be replaced at the same time.

Permits, Inspections & Insurance Documentation

Every rewire we perform is pulled under a master electrician's permit in the appropriate jurisdiction - Montgomery, Howard, Prince George's, Anne Arundel, Frederick, Fairfax, Arlington, Loudoun, or DC - and closed out with a final county inspection. We provide a documentation package suitable for insurance underwriting: permit number, scope of work, inspection sign-off, and circuit-by-circuit panel directory.

If you're rewiring to get back on a homeowner's policy or to satisfy a lender at closing, tell us up front. We'll structure the paperwork so it lands cleanly on your underwriter's desk the first time.