Whole-Home Rewiring San Antonio: Signs & Cost
Whole-home rewiring San Antonio guide: warning signs, costs, permits, panel upgrades, surge protection, and licensed electrician scope.
Whole-home rewiring in San Antonio protects older homes from fire risks. Learn the warning signs, what a rewire involves, permits, and how to plan with a licensed electrician. This guide is part of the C.S.W. Power Solutions San Antonio homeowner library. Use the related links on this page to move from research into the matching licensed service page, compare connected trade requirements, and request a written estimate when the project needs plumbing, electrical, HVAC, generator, remodeling, restoration, or general-contractor coordination.
Whole-Home Rewiring in San Antonio: What Homeowners Need to Know
Whole-home rewiring in San Antonio replaces every circuit, outlet, and fixture wire in a house so the electrical system meets modern safety codes and can handle today's power demands. If your home is showing repeated breaker trips, flickering lights, warm outlet covers, or burning smells with no obvious cause, the wiring itself is likely the problem, not any single appliance. Our licensed electricians at C.S.W. Power Solutions (TECL31793) have walked through hundreds of older San Antonio homes where the original wiring had quietly become a serious fire hazard long before anything visibly went wrong.
Warning Signs Your Home Needs a Rewire
Certain symptoms point toward wiring that has reached the end of its safe service life. Breakers that trip under normal household loads, outlets with two prongs instead of three, lights that dim when a window unit kicks on, discolored or scorched outlet and switch plates, and a faint burning or fishy smell near the panel are all red flags. Aluminum wiring, used in thousands of San Antonio homes built between roughly 1965 and 1973, expands and contracts more than copper and can loosen at connections over time, creating heat and arc faults. Knob-and-tube wiring found in pre-1950 homes lacks a ground conductor entirely and was never designed for air conditioning loads, let alone modern kitchens. If your inspector or insurance adjuster has flagged either type, a full whole-home rewiring is almost always the safest path forward.
Why San Antonio's Older Housing Stock Is Particularly Vulnerable
A large share of homes in established San Antonio neighborhoods, from Alamo Heights and Monte Vista to older subdivisions in Converse and Schertz, were built between the 1940s and the early 1980s. Many have never had a full electrical update. Texas summers are brutal, and San Antonio's sustained heat pushes HVAC equipment hard for five or six months a year. That continuous load accelerates wear on undersized or aging circuits. When CPS Energy upgraded capacity to parts of the grid, homes with 60-amp or 100-amp service panels suddenly had access to more current than their internal wiring was ever designed to carry. A panel upgrade without addressing the branch circuits downstream solves only half the problem, which is why rewiring and panel replacement often go together.
What a Whole-Home Rewire Actually Involves
The process starts with a thorough assessment of your existing panel, service entrance, and every circuit in the home. Walls are accessed through existing openings or, when necessary, small strategically placed cuts in drywall. Each circuit is replaced with properly sized copper wiring, new junction boxes, grounded outlets and switches, tamper-resistant receptacles in bathrooms and kitchens, and arc-fault circuit interrupters on bedroom and living-area circuits as required by the current NEC and Texas electrical code. The work concludes with reconnecting the panel, labeling all circuits clearly, and performing load tests. Patch work on drywall is typically coordinated with the homeowner afterward, either by a finish contractor or as part of a broader remodel scope.
Permits and City of San Antonio Inspections
Any whole-home rewiring project in San Antonio requires an electrical permit from the City of San Antonio Development Services Department. Pulling the permit is not optional, and it protects you as the homeowner: unpermitted electrical work can void homeowner's insurance coverage, create liability in a sale, and leave hazardous work unverified by a city inspector. Our team handles permit applications as a standard part of every rewiring project. After rough-in wiring is complete, a Development Services inspector reviews the work before walls close. Final inspection follows once all devices and fixtures are installed. This process adds a few scheduling steps but gives you documented proof that the work passed city review.
Understanding Rewiring Costs: Key Drivers
Whole-home rewiring in San Antonio is priced on several factors rather than a flat rate: square footage of the home, number of circuits, accessibility inside walls (pier-and-beam homes are easier to route than slab-on-grade with finished ceilings), whether the panel needs replacement at the same time, and whether low-voltage work such as data or coax is included. Larger older homes with two stories or detached garages naturally involve more labor. Requesting a written scope and detailed quote before authorizing work lets you compare apples to apples between electricians. Be cautious of bids that do not specify whether permit fees, inspection costs, and panel work are included. You can request an assessment from our San Antonio electrical team to get a clear picture of what your specific home requires.
Surge Protection Belongs in the Rewiring Plan
A rewire is the ideal time to install a whole-home surge protector at the panel because the panel is already open and the wiring is already staged. San Antonio's spring storm season generates frequent lightning strikes and utility switching events that send voltage spikes into every circuit in the house. A panel-level surge device clamps those spikes before they reach televisions, smart appliances, HVAC controls, and other sensitive electronics. Point-of-use strips at individual outlets add a second layer of protection but cannot substitute for service-entrance protection. Read more about whole-home surge protection during San Antonio's storm season and discuss adding this to your rewiring project scope.
Choosing a Licensed Electrician for a Rewire
Texas requires electrical contractors to hold a state license from the Texas Department of Licensing and Regulation. Always verify the TDLR license number before signing a contract. Ask specifically whether the electrician has experience with rewiring occupied homes, whether they carry general liability and workers compensation insurance, and how they handle the permit and inspection scheduling. A legitimate electrician will pull the permit in their name, not ask you to pull an owner-builder permit on their behalf. C.S.W. Power Solutions operates under TECL31793 and handles full-scope rewiring as part of our broader general contracting capabilities, which means electrical, panel, and any associated structural or drywall work can be coordinated under one licensed team rather than juggling multiple subs.
Frequently Asked Questions
How do I know if my San Antonio home needs to be completely rewired?
The clearest indicators are repeated breaker trips under normal loads, flickering or dimming lights when appliances turn on, two-prong ungrounded outlets throughout the house, discolored or warm outlet plates, and any confirmed presence of aluminum wiring or knob-and-tube wiring. An assessment by a TDLR-licensed electrician will identify whether partial repairs or a full rewire is the right course for your specific home.
Does whole-home rewiring in San Antonio require a permit?
Yes. The City of San Antonio Development Services Department requires an electrical permit for any rewiring project. The licensed electrician you hire should pull the permit in their name and schedule the required city inspections. Unpermitted electrical work can create insurance and resale complications.
How long does a whole-home rewire take in a typical San Antonio house?
A single-story home in the 1,500 to 2,500 square foot range typically takes three to seven working days for rough-in and finish wiring, depending on accessibility inside walls, panel work, and the number of circuits. Homes with two stories, finished attics, or slab-on-grade construction with no crawl space access generally take longer. Your electrician should give you a project timeline as part of the written proposal.
Can I stay in my home during a whole-home rewire?
In most cases, yes. Electricians typically work through the house in sections, restoring power to each area before moving to the next. There will be portions of each day when certain circuits or rooms are without power, but full daily blackouts for an occupied home are usually avoidable. Discuss the work schedule and temporary power plan with your electrician before the project starts.
C.S.W. Power Solutions is a veteran-owned, licensed general contractor serving San Antonio, TX and surrounding communities including Boerne, New Braunfels, Schertz, Stone Oak, Helotes, Alamo Ranch, Converse, Universal City, Live Oak, Leon Valley, Castle Hills, Cibolo, Seguin, and Southtown. Plumbing, electrical, HVAC, generator, EV charger, and remodeling trades all held in-house under one general-contractor license umbrella.
Call 210-504-9796, book online for a written estimate, or text photos so CSW can route plumbing, electrical, HVAC, generator, water heater, drywall, painting, restoration, or general contractor repair requests to the right crew.
Email cswpowersolutions@gmail.com. Located at 4931 Enterprise Drive, Suite 1, San Antonio, TX 78249. Business hours: Mon-Fri 7:00 AM - 6:00 PM, Sat 8:00 AM - 2:00 PM. Free written estimates within one business day.