The Home Insurance Crisis Explained

If your homeowner's insurance premium doubled in the last eight years, you are not an outlier. You are the average. National home insurance premiums have compounded at 8-10% annually — a rate that doubles your cost every 7-9 years. And the forces driving this are structural, not cyclical. Unlike what Zillow Talk implied about insurance being a minor, stable housing cost, the data from the last decade tells a dramatically different story.

The Scale of the Problem

According to NAIC data, the national average homeowner's insurance premium reached approximately $2,300 in 2025. In 2015, it was roughly $1,200. In Florida, the average exceeded $4,500. In Louisiana, it topped $3,800. California, Texas, and Colorado have all seen double-digit annual increases in recent years.

These are not temporary spikes. The Insurance Information Institute (III) reports that the combined ratio for homeowner's insurance — the ratio of claims and expenses to premiums collected — exceeded 100% in multiple recent years, meaning carriers paid out more than they collected. This triggers a self-reinforcing cycle: losses drive rate increases, rate increases drive policy non-renewals, non-renewals reduce competition, reduced competition enables further rate increases.

For homeowners making a build-vs-buy decision, the insurance dimension alone can determine which option produces better 25-year returns.

The Three Engines of Premium Inflation

1. Reinsurance and CAT Bonds

Your insurance carrier does not absorb all the risk it underwrites. It transfers a significant portion to reinsurers and, increasingly, to capital markets through catastrophe bonds (CAT bonds). The global CAT bond market now exceeds $45 billion in outstanding issuance, according to Artemis deal data. When reinsurance rates rise — as they have after every major hurricane, wildfire, and convective storm season — those costs pass directly through to your premium.

The reinsurance cycle works like this: a catastrophic event (Hurricane Ian in 2022, the 2023 Hawaii wildfires, the 2024 convective storm season) generates massive insured losses. Reinsurers raise rates at the January 1 renewal. Primary carriers pass those increases to policyholders over the following 12-18 months. By the time your renewal arrives, the catastrophe that happened thousands of miles away has added 5-15% to your premium.

This is not a conspiracy — it is the mechanics of risk transfer in a global market. But the key insight for homeowners is that reinsurance costs are not proportional across all homes. Older homes with outdated building codes, aging roofs, and legacy electrical systems carry higher loss severity projections. Reinsurers charge primary carriers more to cover these homes, and those costs flow to your premium.

2. The Insurance Float

Insurance carriers collect premiums today and pay claims later. The pool of money they hold in between — the float — is invested in bonds, equities, and other instruments. Carriers often earn more from float investment than from underwriting profit. This creates a structural incentive to prioritize volume (collecting as many premiums as possible) over loss prevention. More policies means more float, even if loss ratios are rising.

Berkshire Hathaway's insurance operations illustrate this at scale. Warren Buffett has repeatedly described float as an interest-free loan from policyholders. Berkshire's float exceeded $168 billion recently — money invested in equities, bonds, and acquisitions while policyholders wait for claims that may never be filed. Every major carrier operates on this same principle, just at smaller scale.

3. Carrier Exits and Market Consolidation

When a state becomes unprofitable for private carriers — due to wildfire exposure in California, hurricane risk in Florida, or hail frequency in Texas — carriers exit. The data on this is stark:

• Florida: State Farm stopped writing new homeowner policies in Florida. Multiple regional carriers entered receivership. Citizens Property Insurance (the state insurer of last resort) grew to over 1.4 million policies.
• California: State Farm and Allstate stopped accepting new homeowner applications in fire-exposed areas. The FAIR Plan (California's insurer of last resort) saw applications surge by over 50%.
• Louisiana: After Hurricanes Laura, Delta, Ida, and subsequent storms, multiple carriers withdrew entirely. Louisiana Insurance Commissioner reports show over a dozen carrier insolvencies or voluntary withdrawals since 2020.
• Texas: While no major carriers have fully exited, multiple carriers have restricted new policies in hail-prone ZIP codes. The Texas Windstorm Insurance Association (TWIA) has grown to cover coastal properties that private carriers will not touch.

Remaining carriers face less competition and raise prices accordingly. NAIC market concentration data shows that homeowners in markets with fewer than three competitive carriers pay 15-30% more than the national average.

What Zillow Talk Got Wrong About Insurance

Spencer Rascoff and Stan Humphries' Zillow Talk (2015) was groundbreaking for its data-driven approach to real estate. But the book was written during a period of relatively stable insurance markets. Its treatment of insurance as a predictable, modest housing cost has not aged well.

Zillow Talk focused primarily on purchase price dynamics, Zestimate accuracy, and renovation ROI. Insurance was treated as a fixed carrying cost — predictable and minor. The book could not have anticipated the structural transformation that began accelerating around 2017: the reinsurance hardening cycle, the carrier exit cascade in catastrophe-exposed states, and the 8-10% annual premium CAGR that has fundamentally changed the economics of homeownership.

The Resale Trap treats insurance not as a fixed cost but as an escalating, state-specific variable that compounds over 25 years and interacts with home age, building code vintage, and material tier. In high-risk states, the 25-year insurance cost differential between a new build and a 20-year-old resale exceeds $80,000 — making it one of the largest single components of the total cost gap.

Why Resale Homes Pay More

Older homes are more expensive to insure for measurable, actuarially-justified reasons:

Roof Age and Material

The age of the roof is the single largest premium factor after location. According to III data, a home with a 15-year-old asphalt shingle roof in a hail-prone state may pay $1,500-$3,000 more per year than an identical-value home with a new impact-resistant roof. Carriers increasingly require roof inspections before issuing or renewing policies, and some will not cover roofs older than 15 years.

Electrical System Vintage

Homes built before 2000 may contain aluminum wiring, Federal Pacific or Zinsco panels, or knob-and-tube wiring in the oldest inventory. Carriers either exclude these homes, charge substantial surcharges, or require upgrades before issuing coverage. Even homes with copper wiring and modern panels lose points in actuarial models if the electrical system exceeds 20 years of age.

Plumbing Material

Polybutylene piping (common in homes built 1978-1995) is a known failure risk. Carriers in many states will not insure homes with polybutylene supply lines without a full repipe. Galvanized steel piping in pre-1970 homes corrodes internally, leading to water damage claims. New homes use PEX or CPVC — materials with lower claim frequencies.

Building Code Compliance

A home built to 2005 building codes does not meet 2024 standards for wind resistance, energy efficiency, or fire protection. Carriers apply credits for homes meeting current codes and surcharges for homes that do not. The gap widens with each code update cycle. New builds automatically receive the maximum code compliance credits.

The Resale Trap models all of these factors across all 50 states, showing exactly how the insurance cost differential develops and compounds over a 25-year ownership period.

The 25-Year Insurance Math

Here is what 25-year insurance compounding looks like in practice. Assume a new build starts at $1,800/year and a comparable resale starts at $2,800/year — a $1,000 annual gap, which is conservative for many markets.

At 8% annual escalation:

• Year 1 gap: $1,000
• Year 10 gap: $2,159
• Year 15 gap: $3,172
• Year 20 gap: $4,661
• Year 25 gap: $6,848
• Cumulative 25-year gap: approximately $78,900

At 10% annual escalation (Florida, Louisiana):

• Cumulative 25-year gap: approximately $108,300

These figures represent insurance alone. When you add maintenance, capex, and opportunity cost — the full seven dimensions — the total gap reaches $318,000-$506,000.

What Homeowners Can Do

The uncomfortable truth is that individual homeowners have limited leverage over insurance premiums. You can:

• Shop carriers annually — Loyalty discounts rarely offset the savings from competitive shopping. NAIC data shows policyholders who shop save an average of 10-20%.
• Raise your deductible — Moving from a $1,000 to a $2,500 deductible can reduce premiums 10-15%, but increases your out-of-pocket exposure.
• Invest in mitigation — Impact-resistant roofing, updated electrical, and wind mitigation features generate premium credits in most states. Florida's My Safe Florida Home program documents specific credit values.
• Consider a new build — Starting with a modern-code, new-material home locks in the lowest available premium tier. The production builder path offers the most cost-efficient way to do this.

But you cannot change the reinsurance market, the CAT bond cycle, or carrier exit patterns. Understanding the mechanics is the first step toward making a housing decision that accounts for where premiums are going — not just where they are today.

The Structural Outlook

Nothing in the current market suggests insurance premium escalation will slow. Climate-driven loss frequency is increasing. The reinsurance market has hardened and shows no signs of softening. Carrier exits from catastrophe-exposed states continue. Construction material costs for claims repair are rising faster than general inflation.

The Resale Trap models three insurance escalation scenarios — 6%, 8%, and 12% CAGR — across all 50 states. Even the most conservative scenario shows a meaningful cost advantage for new construction over 25 years. The 395-page analysis, with full data sourcing, is available on Amazon. If you are buying a home in a state with active carrier exits or premium escalation above the national average, the insurance chapter alone could save you more than the book costs.