A whole-home rewire is not a project to price from a single number online. The cost to rewire a house depends on what is behind the walls, how much electrical capacity the property needs, and how carefully the work can be completed without damaging finished surfaces. In the Bay Area, labor rates, permit requirements, older housing stock, and access challenges all shape the final estimate.
For homeowners, landlords, and property managers, the right question is not simply, “What is the cheapest rewire?” It is, “What scope will make this building safe, code-compliant, and ready for the way people use power now?” A licensed electrical contractor should answer that question after an on-site evaluation, with a clear written scope and no hidden fees.
What Does It Cost to Rewire a House?
For a typical Bay Area home, a full rewire can range broadly from roughly $15,000 to $40,000 or more. Smaller homes with accessible wiring paths and limited wall repair may land toward the lower end. Larger homes, properties with plaster walls, finished basements, multiple stories, aging panels, or complex additions can exceed that range.
That spread is not a lack of transparency. It reflects the reality that two homes with the same square footage can require very different work. One may have a crawlspace and attic that allow electricians to pull new cable with minimal openings. Another may have no accessible pathways, outdated wiring throughout, and a layout that requires careful wall and ceiling access room by room.
A proper estimate should separate the electrical work from related restoration costs when appropriate. Electrical contractors install safe wiring, devices, grounding, breakers, and panels. Drywall, plaster, paint, and finish repairs may be included, coordinated separately, or handled by another trade depending on the project agreement.
The Biggest Factors Behind Rewiring Costs
Home size and electrical layout
More square footage usually means more wire, more circuits, more outlets, more switches, and more labor. But square footage is only the starting point. A compact two-story home may take more effort than a larger single-story house if walls are hard to access and circuits need to travel across multiple levels.
The number of kitchens, bathrooms, laundry areas, offices, garages, workshops, and outdoor spaces also matters. Modern code requires dedicated circuits and GFCI or AFCI protection in many locations. A home that once operated with a handful of overloaded circuits may need a significantly more organized electrical layout after rewiring.
The age and type of existing wiring
Older Bay Area homes often contain wiring systems that deserve close attention. Knob-and-tube wiring, ungrounded two-wire circuits, cloth-insulated conductors, deteriorated connections, and improperly modified DIY work can all increase the project scope.
Aluminum branch wiring may also require special evaluation and corrective work. The issue is not just the wire itself. Electricians must inspect connections, devices, panels, and signs of heat damage to determine whether repairs, specialized connectors, or full replacement are appropriate.
If wiring has been added in stages over decades, tracing circuits can take time. A professional contractor should identify what is active, what is abandoned, and what needs to be safely removed or disconnected before new work begins.
Access behind walls and ceilings
Access is one of the clearest cost drivers. Attics, crawlspaces, unfinished basements, and open framing make it easier to run new cable. Finished ceilings, tile walls, custom millwork, plaster, brick, and tightly built additions make the work more labor-intensive.
A skilled electrician plans routes to minimize openings, but no contractor can promise a complete rewire with zero impact to finished surfaces in every home. The practical trade-off is between preserving finishes where possible and ensuring wiring is installed correctly rather than forcing shortcuts.
Panel upgrades and service capacity
Rewiring a house often reveals that the existing electrical panel is undersized, outdated, overcrowded, or unsafe. Many Bay Area homes were built before central air conditioning, induction ranges, EV chargers, home offices, heat pumps, and modern entertainment systems became common.
A 100-amp service may be enough for some homes, but many modernization projects call for a 200-amp panel upgrade. That work can add substantial cost because it may involve the panel, meter equipment, service conductors, grounding, utility coordination, and permit inspections.
It can also be the right long-term decision. Rewiring without addressing a failing or limited panel may leave the home with new branch circuits but no practical capacity for future upgrades.
Permits, inspections, and local requirements
Electrical permits are not paperwork to skip. They create an inspection record and help verify that the work meets applicable safety standards. Permit fees and local requirements vary by city, whether the property is in Oakland, Berkeley, San Francisco, Alameda, Richmond, or another Bay Area community.
Historic homes, multifamily buildings, tenant-occupied properties, and commercial spaces can introduce additional coordination requirements. For landlords and property managers, scheduling is especially important. Safe access to units, proper notice, temporary power planning, and clear communication can prevent unnecessary disruption.
What a Full Rewire Should Include
When comparing estimates, make sure you are comparing the same scope. A low price may cover only partial replacement, while another proposal may include a complete, code-compliant modernization.
A full-house rewire commonly includes new branch wiring, properly sized circuits, grounded outlets, new switches, updated breakers, required GFCI and AFCI protection, smoke and carbon monoxide detector wiring where required, and labeling of the panel. Depending on the home, it may also include a panel replacement, surge protection, exterior outlets, dedicated appliance circuits, or wiring for lighting and ceiling fans.
Ask whether the estimate includes permit handling, utility coordination if a service upgrade is needed, demolition or removal of obsolete wiring, patching assumptions, and final inspection support. Written details matter because they protect the property owner and reduce change-order surprises once work is underway.
When a Partial Rewire May Make Sense
Not every property needs every wire replaced at once. In some homes, targeted rewiring can address a specific safety concern or renovation area. A kitchen remodel, bathroom upgrade, garage conversion, addition, or damaged circuit may call for new wiring in that section while the rest of the home remains serviceable.
Partial work can be a reasonable budget decision when the existing system has been thoroughly evaluated. It is less appropriate when there are widespread signs of deterioration, frequent tripped breakers, ungrounded outlets throughout the house, burning smells, flickering lights, or visible damage at the panel.
A careful evaluation should distinguish between a manageable repair and a system that has reached the end of its safe service life. Replacing a few outlets will not solve a deeper wiring or capacity problem.
How to Get an Accurate Rewiring Estimate
The fastest way to get useful pricing is to arrange an on-site electrical assessment. A licensed contractor can inspect the panel, test representative circuits, identify accessible routing paths, and discuss how the home is used now and how it may be used in the future.
Before the visit, make a note of problem areas: breakers that trip, outlets that feel warm, rooms with no grounded receptacles, lights that dim when appliances start, and any planned upgrades such as an EV charger, heat pump, hot tub, solar equipment, or home office. These details help build an estimate that fits the property instead of a generic price range.
For a major project, ask for a written estimate that states the planned scope, exclusions, permit approach, payment schedule, and expected project timing. Verify that the contractor is California C-10 licensed, bonded, and insured. Rewiring affects the safety of the entire property, so this is not the place to rely on an unlicensed bargain.
Do Not Wait on Active Electrical Warning Signs
If you notice sparking, smoke, a burning odor, buzzing from the panel, a hot outlet, repeated breaker trips, or a loss of power affecting essential circuits, treat it as an urgent electrical issue. Shut off power if it can be done safely, avoid touching damaged equipment, and call a qualified emergency electrician.
VoltGuard Electric & Security LLC provides safety-first electrical service for Bay Area homes and businesses, including troubleshooting, panel repairs, upgrades, and planned rewiring projects. The goal is not to sell more work than a property needs. It is to identify the risk, explain the options plainly, and complete the work right.
A rewire is a significant investment, but it also gives an older property a safer foundation for daily living, future renovations, and modern electrical demand. Start with a licensed inspection and a clear scope, then make the decision with real information rather than a tempting but incomplete price.
