If a client told me they held eighty percent of their net worth in one company's stock, we would spend the next hour talking about strategies to begin to unwind it. It wouldn't matter how good the company was. Concentration increases risk, and as an advisor, I take that seriously.
And yet most households hold the majority of their net worth in a single building, on a single street, inside a single climate. We don't call that concentration. We call it owning a home.
The exposure most portfolios never name
Look at where a typical Californian household's risk actually sits. The house is the largest asset. The mortgage is the largest liability. The job is usually within driving distance of both. The schools, the parents, the friendships — all inside the same few dozen square miles.
That isn't one exposure. It's several, and they're correlated, which is the word that should get an investor's attention. A bad enough event in that geography doesn't just hit the house. It hits the house, the insurability of the house, the local job market, the value of every comparable property your neighbors are trying to sell at the same moment, and the willingness of anyone to buy into the area for years afterward.
That is precisely the situation advisors spend their careers helping people avoid everywhere else in their financial lives.
Climate is what turns a geography into a risk factor
For a long time, geographic concentration was a fairly benign kind of exposure. Real estate went up. Insurance was available and boring. Where you lived was a lifestyle question, not a balance-sheet one.
That is changing, and it's changing in ways that show up as numbers, not feelings:
- Insurance is repricing, and in places withdrawing. A non-renewal letter is a market telling you what it thinks of your location's risk, in writing.
- Insurability is becoming a condition of value. A house that cannot be insured is a house that cannot be financed, and a house that cannot be financed has a much shorter list of buyers.
- Buyers are starting to price it in. Slowly, unevenly, but they are — and repricing tends to happen all at once, after a long stretch of nothing happening.
None of that requires a catastrophe. It only requires the market to keep updating.
Anxiety is what concentration feels like
Here is the part I think gets misdiagnosed.
Many of my clients in the West are carrying a low-grade unease about where they live. It surfaces during fire season, or when the insurance bill arrives, or when another climate catastrophe hits the headlines and they catch themselves wondering how long they can realistically stay.
I am beginning to believe this is what an undiversified position feels like from the inside. This isn't irrational — it's a correct reading of a real exposure, arriving without a spreadsheet attached.
Which means it may have a financial answer — and it's the same one it's always been: diversification does not remove risk, it stops any single risk from being able to take everything.
What diversifying geography actually means
The instinct people jump to is move. But moving is a blunt instrument, and for most families it isn't on the table — the job is here, the parents are here, the kids are in school here.
The useful insight is that you do not have to live somewhere to own there.
You can hold real estate in a place with a materially different climate profile than your own. You can put your next dollar of property investment somewhere that is uncorrelated with the exposure you already have. You still live where your life is. But not all of your ground is the same ground.
That is diversification in the ordinary, unglamorous, deeply effective sense. And it's available to far more people than the "sell everything and relocate" framing suggests.
Where the legacy property comes from
This is the idea I keep meeting.
Independently — from different clients, in different years, with no knowledge of each other — people arrive at a remarkably consistent version of it. Buy somewhere with lower climate risk. Somewhere with water. Use it for vacations now. Let the kids and grandkids use it later. And, said more quietly but almost always said: somewhere the family could go, if the place we live becomes a place we can't.
A name has emerged for this idea: the legacy property.
I've come to think of it as the household version of a rebalancing trade. It is people intuitively doing what the math would tell them to do, arriving at it from the direction of family rather than the direction of a portfolio, and getting to broadly the right place. The instinct is sound. It is diversification, dressed as a cabin.
It only works if the second place is genuinely different
Which brings me to the one condition that makes or breaks it.
A legacy property only diversifies you if it is actually uncorrelated with what you already own. A second home in another dry canyon, in another state, on the same wildfire trajectory, is not diversification. It is doubling down with extra travel time. "Far away" and "lower risk" are not the same variable — and the easy one to confirm is not the one that matters.
So the questions are the ordinary ones, asked early:
- Lower risk than where you are — measurably, on which hazards? Fire, flood, heat, water availability, and hurricane exposure are different risks with different geographies. A place can be excellent on one and poor on another.
- Is it insurable, at a price you'd still accept in ten years? If the answer is uncertain today, it is not a hedge. It is a second version of the problem you're trying to hedge.
- Will it be used? An asset that sits empty is a carrying cost with a story attached. The families for whom this works are the ones who actually go.
- Does the math stand on its own? Run the carrying cost with the same discipline you'd apply to any other purchase this size. A hedge you can't afford to keep isn't a hedge.
The question that built this
For a long time, these conversations ran into the same wall. The strategy was sound, the client was ready, and then they'd ask: where?
I could model the purchase. I could tell them what it did to their cash flow, how to hold it, what it meant for the estate. But where is a different question, and the answers available to me were listicles, real-estate marketing, and hazard maps that describe today and say nothing useful about the next thirty years.
High Ground Map exists because I got tired of not being able to answer it. Draw the region you're weighing and see how climate suitability actually varies across it. Use the Optimize scan to find towns that best match your criteria. And when you've found the town you want to focus on, run a Neighborhood Scan, because resilience can shift meaningfully over a few streets — and a listing photo will never tell you which side of that line you're on.
The reframe
You already know that holding one stock is risky.
The same logic applies to the ground under your feet, and almost nobody applies it — not because the argument is hard, but because we've never thought of a home as a position.
It is. And the fix is the ordinary one — not selling up and moving, but making sure the next property you buy isn't exposed to the same things as the one you live in. That's really all a legacy property needs to be.