Old wiring + tight insurance market = rewire matters.
California's homeowner insurance market has tightened sharply since 2022. Older Marin homes with vintage wiring are increasingly hard to insure. Rewiring is often the difference between coverage and refusal.
By Steven Lockhart · Reviewed by Alex Towery, C-10 #989290
Updated 2026-06-16
California homeowner insurance carriers have substantially tightened underwriting on older homes since 2022. FPE/Zinsco panels, knob-and-tube wiring, aluminum branch circuits, and cloth-insulated wiring all trigger refusal or surcharge with most carriers. Documented rewire remediation typically resolves these issues — but coordination with the carrier on scope and documentation is important. Don't rewire blindly; coordinate with insurance.
01What carriers flag in 2026 California.
FPE/Zinsco panels
Near-universal refusal or 'remediation required' across California carriers. Replacement is the standard answer; we'll never see an FPE panel pass underwriting again.
Knob-and-tube wiring
Most carriers refuse to write new coverage on homes with active K&T. Some allow it with reduced coverage limits; some grandfather existing policies but refuse renewal. Removal or full deactivation is the standard remediation.
Aluminum branch wiring
Carriers vary — some require full replacement, most accept AlumiConn/COPALUM retrofit, a few grandfather existing coverage. Mid-tier risk.
Cloth-insulated wiring
Varies by carrier and condition. Carriers asking detailed questions about wiring condition during underwriting — if cloth is identified and 'functional' (not actively deteriorating), some carriers will write coverage with surcharge; deteriorating cloth typically refused.
Pre-1965 homes generally
Even without specific issues identified, pre-1965 California homes face higher scrutiny. Some carriers add age-based surcharges; some require home inspection before writing. Modern documented electrical reduces this friction.
02Coordinating the rewire with your carrier.
The right sequence: identify the specific concerns your carrier has flagged, scope rewire work to address those specific concerns plus reasonable code modernization, document the work in the format your carrier wants, submit documentation to carrier for review. Done right, the carrier confirms in writing that the rewire satisfies their concerns and removes any surcharges or coverage restrictions.
Done wrong: rewire without consulting carrier first, then submit afterward, and discover the work doesn't quite match what the carrier required. We've seen homeowners do $30,000 of rewiring that the carrier still considered insufficient because it didn't address specific items the carrier wanted (typically: K&T deactivation in attic was incomplete, or AlumiConn retrofit didn't include service-entrance area, or panel labeling didn't meet carrier's specific spec). Carrier coordination up front prevents these expensive mismatches.
03What carrier documentation usually requires.
| Documentation item | Purpose |
|---|---|
| Pre-work inspection report | Establishes baseline condition |
| Detailed scope description | Confirms remediation addresses carrier concerns |
| Permit documentation | Proves work was code-compliant |
| Inspector pass-off | Proves work passes AHJ inspection |
| Post-work photos at panel/key locations | Visual evidence of completion |
| Materials list and specifications | Confirms quality of work (devices, connectors, wire grade) |
| Contractor license documentation | Confirms licensed contractor |
| Insurance certificate (contractor's) | Confirms appropriate insurance during work |
Common questions.
Will my insurance cover any rewire cost?
Almost never directly — rewiring is treated as maintenance/improvement, not damage repair. Insurance covers electrical work that's damage repair (e.g., rewiring after fire damage, covered by the fire claim) but not preventive remediation. The financial benefit is indirect: rewiring enables insurance coverage to continue or improve, vs the alternative of refused coverage or higher premiums. The math usually works over time even without direct reimbursement.
Should I tell my carrier about old wiring before they discover it?
Usually yes for renewal — they're going to ask, and proactive disclosure with remediation plan is better than discovery during a claim. For new policy application: disclose what's accurate. Carriers can refuse coverage retroactively if material information was withheld. The disclosure conversation is also when you learn what the carrier specifically requires — useful for scoping the rewire correctly.
Can I get insurance discounts after rewiring?
Sometimes. Major California carriers don't typically offer explicit 'rewired home' discounts but do offer better terms after remediation: lower premiums on renewal, removal of surcharges, willingness to write coverage previously declined. Net financial improvement over 5-10 years often exceeds the rewire cost. Specific outcomes vary by carrier — some are more responsive than others. Worth asking your carrier before scoping.
What if I'm selling the home soon?
Pre-sale rewiring is increasingly important in Marin. Buyers' agents and inspectors look for documented electrical updates; homes with vintage wiring face buyer scrutiny and sometimes deal-breaking concerns. A documented pre-sale rewire removes one of the most common deal-killers in vintage Marin inventory. Cost is usually returned at sale through faster offer acceptance, fewer credits requested, and stronger negotiating position. For homes selling within 12-24 months, pre-sale rewiring math usually works out.
What if my carrier refuses to renew coverage?
California has a default-of-last-resort carrier (California FAIR Plan) that writes coverage when private carriers refuse. Coverage is more limited and more expensive than private carriers. Most homeowners want to avoid FAIR Plan if possible — and rewiring is usually the path back to private carrier coverage. We've helped homeowners structure rewire work specifically to satisfy carrier requirements for return-to-private-coverage. Document everything; carriers will want to see specifics before re-writing.
How do you handle pricing — flat fee or hourly?
Both, depending on scope. Routine service calls and predictable scope (panel replacement, EV charger install, transfer switch install, fixture replacement) are flat-fee quoted up front. Diagnostic visits and emergency scope are hourly because we don't know what we'll find. Either way, you get a written quote before work starts on anything significant, and we don't proceed beyond the quote without your sign-off.
How quickly can you schedule?
Depends on scope and season. Emergency dispatch: same-day across Marin County (1-3 hours business hours, 1-4 hours after-hours). Same-day standard service: 3-6 hours from call when capacity allows; otherwise next business day. Scheduled service work: 1-3 weeks typical. Larger projects requiring permits and PG&E coordination: 4-12 weeks depending on scope. We're upfront about timeline at the quote stage.
What warranty do you offer on work?
Our standard residential warranty: 2 years on labor, manufacturer warranty on parts (varies by product — typically 1-10 years). Major installs (panels, generators, EV chargers) often have longer manufacturer warranties (5-10 years). If there's an issue with our work in the warranty period, we come back and fix it at no cost. We also stand behind work past warranty — repeat customers and referrals matter more than a transactional fix.
Are you licensed and insured?
Yes. California State License Board C-10 Electrical Contractor #989290, in good standing. Carry general liability insurance and workers' compensation insurance as required by California law. Bondable on projects requiring it. Happy to provide proof of insurance to clients or property managers on request. License lookup: cslb.ca.gov.
Talk to a licensed electrician in Marin.
Family-run, C-10 #989290, 20+ years in the trade. Honest scoping, fair pricing, work that lasts.