The distinction that decides what you spend
People arrive at this question having been told, usually second-hand, that their insurer requires a panel replacement or a rewire. It is worth being precise about what is actually happening, because the precise version changes the decision.
An insurance company has no authority over your house. It cannot require you to do anything. What it can do is decide not to offer you a policy, or not to renew the one you have. That is a genuine and potentially expensive consequence — nobody is suggesting it is trivial — but it is a commercial decision on their side, not an obligation on yours.
Why it matters practically: an obligation has to be satisfied, and satisfied in whatever form the rule specifies. A commercial decision can be negotiated, documented around, or answered by going elsewhere. Somebody who believes they are under a legal requirement tends to buy the largest version of the work. Somebody who understands they are managing an eligibility question tends to find out what is actually being asked first.
Read the notice before you spend anything
This is the single most useful thing on this page, and it costs nothing.
California requires that a residential property non-renewal notice be delivered at least 75 days before the policy expires, and that it state the specific reason or reasons for the non-renewal. So you do not have to guess whether your panel is the problem. The answer is on the paperwork in front of you.
That matters because the California homeowners market has been under sustained pressure for reasons that have nothing to do with anybody's wiring. Carriers have withdrawn from or restricted business in parts of the state on wildfire-risk grounds, and a non-renewal driven by where your house sits will not be solved by anything an electrician does inside it. If the stated reason is exposure, or a general withdrawal, the honest advice is to talk to a broker rather than to us.
We would rather say that plainly than have somebody spend on a service rebuild that was never going to change the outcome.
What actually draws underwriting attention
Where wiring genuinely is the issue, a short list of conditions recurs:
- ACTIVE KNOB-AND-TUBE — the earliest method, ungrounded, and particularly where later insulation has been laid over it
- FEDERAL PACIFIC STAB-LOK and ZINSCO or SYLVANIA panels — the two brands with published research behind the concern about them
- ALUMINIUM BRANCH WIRING — the most misunderstood of the four, and the one where the cheapest correct answer is usually much smaller than what people expect
- FUSE BOXES and obviously undersized services, which read as age markers as much as hazards
None of these is automatically fatal to getting cover. They are questions that get asked, and the answer that satisfies is usually documentation rather than demolition.
Why we will not list carriers by name
Search this topic and you will find pages naming half a dozen large insurers and stating flatly what each of them requires. We looked hard at whether we could do that responsibly, and concluded we could not.
Underwriting positions are specific to a product, a year and a filing. They change. A guideline written in one year can still be quoted years later as though it described what happens to you today, when the company in question may have stopped writing new business in the state entirely in the interim. Publishing that as current would be worse than saying nothing, because it reads as authoritative.
So this page says what is generally true — many California carriers treat these conditions as an eligibility question — and sends you to the only source whose answer actually binds anything: your own carrier or broker. That is one phone call and it beats any list.
Aluminium: the expensive misconception
If you take one specific thing from this page other than reading your notice, take this one.
Aluminium branch wiring does not fail along the wire. It fails at the CONNECTIONS — the metal expands and contracts more than copper under load, it oxidises to a poorly conducting surface layer, and it creeps under the pressure of a terminal screw, so joints that were tight on installation day work loose over decades. Because the problem lives at the joints, repairing every joint addresses it.
The Consumer Product Safety Commission recognises specific repair methods for precisely this situation: a special compression connector applied with dedicated tooling by installers certified for it, and a lug-based alternative. Where a carrier raises aluminium, what it generally wants is evidence that the connections have been repaired by a licensed electrician using a recognised method.
That is a materially smaller and cheaper job than rewiring a house. Anyone who responds to "we have aluminium wiring" with a whole-house rewire quote, without first establishing what is actually being asked for, is quoting the largest available answer to a question nobody has asked yet.
If you are selling: what buyers now get told
California added a disclosure requirement that applies to single-family residential transactions on or after January 1, 2026. It asks that prospective buyers be given a statement in prescribed words. The statement itself reads, in part:
"In a purchase of real property, it may be advisable to obtain an inspection by a qualified professional of the electrical system(s) of any buildings, including, but not limited to, the main service panel, the subpanel(s), and wiring. Substandard, recalled, or faulty wiring may cause a fire risk and may make it difficult to obtain property insurance."
Two things worth being clear about. First, the obligation belongs to sellers and their agents. Nothing in it attaches to a contractor, and nobody needs an electrician in order to comply with it — we are useful here, not necessary. Second, what it means for your particular transaction is a question for your agent rather than for us. We are not your representative in a sale and this page is not advice about one.
What it does change is the tenor of the conversation. The connection between wiring condition and insurability is now something the state asks buyers to be told about explicitly, rather than something that comes up late if it comes up at all. In practice that tends to reward knowing what you have before you list.
What documentation generally helps
In general terms — and it is general, because the accepting party decides:
- A WRITTEN ASSESSMENT from a licensed electrician describing what is actually installed, rather than a verbal reassurance
- EVIDENCE OF REMEDIATION — what was repaired or replaced, by what method, and when
- PERMIT AND INSPECTION SIGN-OFF where the work required it, which is frequently the piece that carries the most weight because a third party verified it
- PHOTOGRAPHS, which do more work than people expect when the person deciding has never seen the house
We can supply the first three for work we do. What we cannot do is tell you what your carrier will accept, or deal with them on your behalf. Be wary of anyone who offers to — a contractor has no standing with your insurer, and your agent or broker is the person who actually knows how to have that conversation.
If cover is genuinely unavailable
Worth knowing so that a decline does not feel like the end of the road. The California FAIR Plan exists as a last-resort option for people who cannot obtain cover in the ordinary market, and under its published Plan of Operation substandard wiring is not in itself an automatic bar to a policy.
It is genuinely a fallback rather than something to aim for — it sits behind the admitted and surplus lines markets by design. But it exists, and knowing it exists is better than concluding from one declined application that the house is uninsurable.