Rewiring Older Homes: Electrician in South Pasadena, CA

Pull the cover plate off an outlet in a South Pasadena bungalow built before the Depression and you may find wiring older than the house's second owner. Cloth-insulated conductors, no ground wire, the occasional surviving run of knob-and-tube — it is the standard picture on streets around Mission Street, Monterey Hills, and the Craftsman blocks off Fair Oaks.

Here is what house rewiring in South Pasadena actually involves, how to tell whether your home needs it, and what a licensed electrician looks at before quoting the job.

Why South Pasadena Homes Need Rewiring

South Pasadena's housing stock is unusually old for Los Angeles County. Much of the city was platted and built between the 1900s and the 1920s, and large sections of it are protected as historic districts, which means original homes were remodeled rather than replaced. The framing and the plaster survived — and so, often, did the wiring.

Wiring installed in that era was designed for a couple of lamps and a radio. It was never intended to carry a modern kitchen, a home office, central air, and an EV charger. Three problems show up again and again:

• Knob-and-tube wiring — ungrounded, and dangerous when buried under blown-in attic insulation, which traps heat around conductors that were designed to shed it into open air.
• Cloth-insulated branch circuits — the fabric and rubber jacket dries out, cracks, and flakes off the copper, especially in hot attics and inside junction boxes.
• Too few circuits — an entire floor sharing one 15-amp circuit is common, which is why breakers trip whenever the microwave and toaster run together.

Signs Your Home Is Due for a Rewire

You rarely get one dramatic warning. You get a pattern of small ones:

• Two-prong outlets throughout the house, or three-prong outlets that test as ungrounded
• Breakers or fuses that trip on routine loads, not just during a storm
• Warm switch plates, buzzing outlets, or a faint burning smell near a receptacle
• Lights that dim when the HVAC or refrigerator compressor kicks on
• Extension cords and power strips doing permanent duty because there are no outlets where you need them
• An insurance carrier or home inspector flagging knob-and-tube or cloth wiring during a sale or renewal

A burning smell or a sparking outlet is not a scheduling item — shut off the circuit and call an electrician the same day. Our emergency electrician team in South Pasadena is available around the clock for exactly that.

Whole-House Rewire vs. Partial Rewire

Not every old house needs to be taken back to bare studs. A good electrician scopes the work to what is actually failing.

Partial rewire

Common when a previous owner already updated part of the home. We replace the original circuits that remain — often the kitchen, bath, and bedrooms — add dedicated circuits and grounded outlets, and leave sound, code-compliant work in place. This is the usual outcome in homes remodeled in the 1980s or later.

Whole-house rewire

Every branch circuit is replaced with modern copper NM cable, new boxes and devices go in, and the system is grounded and protected with GFCI and AFCI breakers where code requires. In a two-story Craftsman with finished plaster, most of the routing happens through the attic, the basement or crawlspace, and a limited number of small access cuts — not by gutting walls.

A rewire is also the natural moment to address the service. If the home still has a 100-amp panel or an old fuse box, pairing the rewire with an electrical panel upgrade in South Pasadena costs far less than doing the two jobs a year apart.

What the Job Looks Like, Start to Finish

• Assessment — we open a sample of outlets, switches, and junction boxes, inspect the attic and crawlspace, and test grounding and polarity before quoting anything.
• Scope and permit — rewiring is permitted work. We pull the permit through the South Pasadena building department and coordinate inspection.
• Rough-in — new circuits are run, boxes set, and old conductors abandoned or removed. Power is staged so you are not without electricity for the duration.
• Panel and grounding — new circuits are landed, the grounding electrode system is brought up to code, and AFCI/GFCI protection is installed where required.
• Inspection and finish — the city inspects, then devices and plates go on and patched areas are prepped for paint or plaster.

On historic-district properties, exterior-visible work such as a relocated meter or service mast may need design review in addition to the electrical permit. Plan for that in the timeline rather than discovering it mid-project.

What It Costs and What Moves the Number

Rewiring is priced by the house, not by a rate card. Square footage, number of stories, plaster versus drywall, attic and crawlspace access, how many circuits the home needs, and whether the panel is being replaced all move the figure — and a two-bedroom bungalow and a four-bedroom two-story on the same street can be far apart. Permit fees vary by jurisdiction and change over time.

Get a written, itemized estimate that separates the rewire, the panel work, permits, and patching, and confirm current pricing directly with your contractor. Be skeptical of any quote given over the phone without someone opening a box and looking at what is behind your walls.

Frequently Asked Questions

How long does it take to rewire a house in South Pasadena?

Most single-family rewires run roughly one to two weeks of field work, plus scheduling time for permits and city inspection. Partial rewires are often a few days. Older homes with tight attic clearances or full plaster walls take longer than a post-war house with an open attic.

Can you rewire a house without removing drywall or plaster?

Largely, yes. Experienced electricians fish new cable through attic and crawlspace routes and make small, targeted access cuts at boxes and drops rather than opening full walls. Some patching is unavoidable, but a careful rewire is far less invasive than homeowners expect — which matters in a house with original plaster and wood trim.

Do I have to remove knob-and-tube wiring?

Existing knob-and-tube is not automatically illegal, but it cannot be extended, it must not be covered by insulation, and many insurers now decline or surcharge policies on homes that still have it. If you are insulating the attic, selling, or refinancing, replacement usually becomes the practical answer.

Do I need a permit to rewire my home?

Yes. Rewiring requires a permit and inspection, and a licensed contractor should pull it in their own name. Unpermitted electrical work surfaces during escrow and can stall a sale or force you to open finished walls a second time.

Can I stay in the house during the rewire?

Most homeowners do. Work is sequenced room by room so power stays on to the rest of the house, though you should expect dust, daily circuit shutoffs in the active area, and crews in the attic. Families with young children sometimes choose to be out during the noisiest days.

Talk to a Licensed South Pasadena Electrician

911 Construction & Electric Inc. is a licensed, bonded, and insured C-10 electrical contractor (CA Lic. #1027421) serving South Pasadena, Pasadena, San Marino, Alhambra, and the wider San Gabriel Valley and Los Angeles area. We handle whole-house and partial rewiring, panel upgrades, electrical repairs, and EV charger installation, and we are EVITP-certified. For a free estimate, contact us here or call 747-255-8595.