Homeowner’s insurance covers the dwelling structure, personal belongings inside it, liability arising from the property, and additional living expenses (ALE) during a covered loss when the home is uninhabitable. Renter’s insurance drops the dwelling-structure coverage (the landlord carries that on a separate policy) and covers contents, liability, and ALE.
Two coverage tracks run inside a homeowner’s policy:
Coverage on the dwelling, attached structures, detached structures (garage, shed, pool), contents, landscaping, and ALE. Two design variables matter. The peril basis: all-risk (open perils, covers everything except listed exclusions) is the only sane choice; named-peril policies exist for niche cases and are otherwise traps. The valuation basis: replacement cost (rebuild at current construction prices) beats actual cash value (purchase price minus age-based depreciation) for any structure you would in fact rebuild. Private-client carriers offer guaranteed replacement cost, which pays to rebuild even if construction cost has risen past the policy limit — worth the small premium difference in any wildfire or hurricane zone where post-disaster construction prices spike sharply.
Coverage for bodily injury or property damage you, household members, or pets cause to others, plus medical-payments coverage that pays small medical bills for visitors regardless of fault. Standard limits run $300,000–$500,000, which is inadequate once your net worth is meaningfully larger than that limit — the realistic backstop comes from the umbrella sitting on top.
The standard exclusions to read carefully: flood (purchased separately through the National Flood Insurance Program or the expanding private flood market), earthquake (separate rider or specialty carrier, expensive in California), mold (capped or excluded in most policies), governmental action, ordinance and law (rebuild to current code after a loss), and pollution. Each of these has a corresponding endorsement available at additional premium; for any reader with exposure to the underlying peril, the endorsement is usually cheap relative to the uncovered tail.
The standard ISO policy taxonomy (HO-1 through HO-8) is mostly tutorial overhead at this point. The relevant forms in practice:
The mass-market default. Open-perils coverage on the dwelling, named-perils on contents. Adequate for a median home where contents are modest.
Comprehensive form. Open-perils coverage on both dwelling and contents, with higher sub-limits on jewelry, furs, and other special-class items. The default for a high-value home in the standard market; pay the premium difference for the broader contents coverage.
Condominium form. Covers the unit interior (walls in, floors, fixtures) plus contents and liability; the master policy on the building covers the structure.
Renter’s form. Contents and liability only.
Chubb Masterpiece, AIG PCG, PURE’s primary form, and Cincinnati Premier are not ISO standard forms; they are proprietary manuscript policies for high-value homes. The key features — guaranteed replacement cost, cash-settlement on total loss, blanket personal property coverage (no per-item sub-limits), worldwide automatic coverage on new acquisitions for 30 days — are typically baseline, not endorsements.
Four questions for any homeowner’s policy:
Dwelling replacement cost. Insure the dwelling for 100% of its replacement cost — the cost to rebuild at current local construction prices, not the market value (which includes the land, irrelevant to a rebuild). Get a replacement-cost appraisal from the carrier or an independent appraiser; the construction-cost number your real-estate agent quoted is for a different purpose. Increase the limit annually for construction-cost inflation, which has run materially above headline CPI; opt for the inflation guard rider that does this automatically.
The 80% coinsurance penalty applies if you under-insure: partial losses are reimbursed by the ratio
where is reimbursement payable, is the amount of loss, is the deductible, is insurance carried, and is replacement value. Insuring for less than 80% of replacement cost means partial losses are paid pro-rata, leaving you out of pocket on every claim. Insuring for 100% avoids the math; private-client carriers’ guaranteed-replacement endorsement removes even the policy limit as a ceiling.
Contents replacement cost. Standard policies cap contents at 50% of the dwelling limit and pay actual cash value (purchase price minus age-based depreciation):
where is purchase price, is current age in years, and is life expectancy in years. Replacement-cost coverage on contents is an inexpensive upgrade in the standard market and is typically baseline in the private-client market. For homes where contents are substantial, request the contents limit raised explicitly — the 50% default is easy to exceed.
Scheduled personal property floaters for high-value items. The standard policy caps coverage on jewelry, furs, watches, firearms, fine art, cash, and silverware — typically $2,500–$5,000 per category total, with per-item sub-limits that pay nothing on a $50,000 ring or a $200,000 painting. The fix is a scheduled personal property floater (also called an inland marine or jewelry/fine arts policy): each item listed by description, photograph, and agreed value; coverage worldwide (not just on premises) and on an agreed-value basis (no depreciation, no actual-cash-value haircut); typically no deductible. Premium runs roughly 1% of insured value annually for jewelry, 0.10%–0.30% for fine art (driven by storage conditions, climate control, and movement frequency), and varies for wine, watches, firearms, and collectibles. Get a current appraisal every 3–5 years for any scheduled item whose market price moves; rising prices that outrun the schedule leave you under-insured on the loss.
The standard homeowner’s market is in retreat from the catastrophic-loss zones. State Farm, Allstate, AIG, Liberty Mutual, and others stopped writing new homeowner’s policies in California in 2023–2024, citing wildfire losses and the state’s rate-cap regime; similar dynamics play out for hurricane exposure in Florida and Louisiana. The practical consequence for readers with property in these zones is that the standard-market option has narrowed sharply or disappeared, and the realistic placement options are:
Chubb, PURE, and Cincinnati continue to write in CA wildfire zones with stricter underwriting (defensible-space inspections, brush clearance, Class A roofing, sprinklered interiors). Premium is materially higher than the pre-crisis baseline but the coverage is real.
Surplus-lines placements through brokers like Burns & Wilcox, RPS, or Amwins, written on Lloyd’s of London paper or other specialty carriers. Premium runs 2x–5x the pre-crisis admitted rates, deductibles climb (5% of dwelling value for wildfire is now standard, sometimes 10%), and coverage limits sometimes cap below replacement cost. The E&S market is not subject to state guaranty fund protection; the carrier’s AM Best financial-strength rating is the only safety net. Insist on an A or A+ rating, or walk away.
The insurer of last resort, a syndicate of all carriers licensed in CA. Coverage is limited (dwelling cap was $3M historically, raised under recent regulatory revisions for certain high-value use cases; check current limits), the policy form is bare-bones (fire and a few named perils only), and a supplemental difference in conditions (DIC) policy is needed to add the theft, liability, and water coverages the FAIR Plan does not include. The FAIR-plus-DIC stack is the placement of last resort, and is markedly worse than a private-client admitted policy where one is available.
If you are buying or holding property in a high-wildfire or coastal-hurricane zone, the insurance question now precedes the real-estate question — get a policy quote from a private-client broker before close, and walk if the deductible structure or premium load changes the investment thesis. The 5% wildfire deductible on a $4M dwelling is a $200,000 contingent lump that needs a sinking-fund line item (section “Annual Renewals and Deductibles”).