Why Did My California Apartment Building Insurance Go Up? How to Read the Renewal and What a Re-Quote Needs

An apartment building renewal that jumps 30, 60, or 100 percent is not one event; it is usually two or three stacked on top of each other, and the fix depends on which ones apply to your building. This article is about buildings of five or more units insured on commercial habitational forms. If you own a duplex, triplex, or fourplex, you are on a personal-lines landlord policy with a different market, and the last section explains why that matters.

First, read your own renewal

Before shopping, pull the expiring and renewal declarations side by side and look at four numbers:

Line	What it tells you
Building limit	If it rose and the rate held, you are paying for construction-cost inflation on a higher insured value, not a repricing of your risk
Rate (premium divided by $100 of building value)	If this moved, the carrier repriced the building's age, systems, location, or loss history
Water damage deductible, and its structure	Per-occurrence or per-unit; the amount; whether it replaces or stacks on the base deductible
Ordinance or law limit	Code-upgrade coverage after a loss; a large share of premium on older buildings, and often adjustable

Many "the premium doubled" conversations turn out to be a limit increase the owner never saw, plus a deductible restructure that moved risk back onto the owner without lowering the price. Knowing which happened decides whether you need a different carrier or a different conversation with the one you have.

The three drivers

Water damage frequency. Not wildfire. The losses that pushed admitted carriers out of older multifamily buildings are supply-line failures, water heater and washer-hose leaks, and roof leaks in buildings with original plumbing. Carriers answered by raising water deductibles, restructuring them per unit, excluding older plumbing, or leaving the class.

Replacement-cost values. Reconstruction costs rose faster than most insured values, and carriers have been correcting schedules at renewal. A building insured for $180 per square foot in 2020 may need $300 or more today, and coinsurance clauses penalize the owner who stays underinsured. The premium rises even when the rate does not.

Liability severity. Large verdicts in habitability, security, and premises-injury cases have raised umbrella pricing and led some carriers to restrict assault-and-battery or habitability coverage. Liability has become the harder line to place on many buildings.

What the market data says

The property side has turned, nationally, for buildings carriers want. The Council of Insurance Agents & Brokers' survey for the second quarter of 2026 recorded commercial property premiums down 6.3 percent on average, the largest decrease of any line, with all accounts down 2.0 percent; commercial auto (up 4.5 percent) and umbrella (up 5.3 percent) were the lines still rising (CIAB Q2 2026 P&C Market Survey, August 18, 2026). For multifamily specifically, the National Multifamily Housing Council's 2024 State of Multifamily Risk survey, released March 13, 2025, reported the first decline in property insurance rates since 2017, after 27 consecutive quarters of increases, while noting that rates "remain significantly elevated compared to historical norms" (NMHC, March 13, 2025). Its 2023 survey had recorded property insurance costs up about 26 percent in a year, with 61 percent of respondents raising deductibles over the prior three years to keep coverage affordable (NMHC, June 5, 2023).

The same wholesale market reports that describe property as highly competitive heading into 2026 describe habitational casualty capacity retracting and terms tightening. That split is the practical point: a well-maintained building with a clean loss record can often be placed at better property terms than its last renewal, while the liability and umbrella layers above it have gotten harder. Your renewal is probably a mix of both.

The water deductible is the term that matters

Two structures are common and owners routinely do not know which one they have.

• Per-occurrence water deductible. A single deductible, often $10,000 to $50,000, applied in place of the base deductible when the cause of loss is water.
• Per-unit water deductible. A deductible for each unit damaged, often $2,500 to $10,000, applied in addition to the policy deductible. A riser failure that damages four units carries four unit deductibles plus the base.

Neither is wrong. One is better for a building where losses tend to be single-unit; the other for a building where a plumbing failure tends to cascade. Both are negotiable in a market where specialty carriers and managing general agents are competing for habitational business again. We put the water deductible structure on the first page of every habitational proposal, next to the premium, because the two numbers only mean something together.

The California compliance facts underwriters ask about

SB 721 balcony and walkway inspections. Health and Safety Code section 17973 requires buildings with three or more units to have their exterior elevated elements inspected by a licensed professional, sampling at least 15 percent of each element type. AB 2579 moved the first deadline to January 1, 2026, which has passed; re-inspection is every six years. Every habitational underwriter asks about exterior walkways. A completed report with documented repairs is an asset in your submission.

FAIR Plan commercial limits. For buildings in wildfire hazard zones where nothing else can be procured after the required search of admitted and surplus lines markets, the California FAIR Plan's commercial program carries Division I limits of $20 million per building with a $100 million maximum per location, approved by the Insurance Commissioner on March 28, 2025 (CDI press release). The Plan began offering the higher limits in mid-2025 under a program that runs three years, so it sunsets in 2028. It is a named-peril fire policy and must be paired with other coverage. It is the last resort, not the plan.

Post-emergency moratorium. Since January 1, 2026, Insurance Code section 675.55 (added by SB 547, Chapter 544, Statutes of 2025) bars insurers from cancelling or non-renewing commercial property policies in ZIP codes within or adjacent to a declared fire emergency perimeter for one year after the declaration. Habitational property, including apartment complexes and multifamily buildings of more than five units, is expressly protected even on large policies that would otherwise be excluded. The Department of Insurance applied it, alongside the older residential moratorium in section 675.1, after the August 2026 Gann Fire (CDI Bulletin 2026-6). The statute has exceptions, for example changes that make the risk uninsurable, so it is a protection to know about, not a guarantee.

What gets a building competed for

Underwriters price what they can verify. The submissions that come back with competitive terms carry:

1. A statement of values per building: year built, construction type, square footage, unit count, and the replacement-cost basis.
2. The age of the roof, plumbing, electrical, and HVAC, with dates of replacements. A documented copper or PEX repipe, a panel upgrade, and a roof replacement move pricing more than any other facts on the page.
3. Five years of currently valued loss runs.
4. Occupancy and a rent roll summary.
5. Protective devices: sprinklers, alarms, cameras, exterior lighting.
6. The SB 721 report, where one exists.

Most of this already exists in your files or in public records. We assemble it and ask only for what we cannot look up, then take the building to the admitted carriers still writing the class first and to the specialty habitational markets after the diligent search California requires, and show the terms side by side: premium, building limit, water deductible structure, ordinance or law limit, and liability terms. Our apartment building insurance page describes the program in full, or start a quote with the building address and unit count.

If you own one to four units, this is a different market

Duplexes, triplexes, and fourplexes are insured on personal-lines landlord policies (dwelling fire forms), with different carriers, separate rate filings, and generally lower premiums per unit. The rate news in that market is also different: the State Farm General settlement announced by the California Department of Insurance on March 6, 2026 reduced that carrier's rental-dwelling increase from 38 percent to 32.8 percent, with refunds plus 10 percent interest retroactive to June 1, 2025 (CDI press release, March 6, 2026). That figure is often quoted as if it described apartment buildings. It does not; it describes one personal-lines carrier's dwelling policies. Small-building owners should start a quote and choose the rental dwellings line so the questions match the building.

Sources and verification

Statutory, regulatory, and survey statements above were checked against the following on October 30, 2026: Health and Safety Code section 17973 and AB 2579 (balcony inspection requirement and the January 1, 2026 deadline); Insurance Code section 675.55 as added by SB 547 (Chapter 544, Statutes of 2025) and CDI Bulletin 2026-6 (post-emergency moratorium); the California Department of Insurance press release of March 28, 2025 (FAIR Plan Division I limits; the mid-2025 offering date and 2028 sunset follow from the 120-day and three-year terms in the approval documents rather than from a stated calendar date); the Department's March 6, 2026 press release on the State Farm General settlement; the CIAB Q2 2026 P&C Market Survey; and the NMHC 2023 and 2024 State of Multifamily Risk survey releases. Deductible ranges describe terms we see in current habitational placements and vary by carrier and building. This article is not legal advice and will be updated when the facts change.