The San Jacinto fault runs under the San Bernardino Valley and on through San Jacinto and Hemet, and the San Andreas runs along the mountain front. Fire hazard maps for local areas were redone in 2025, and CAL FIRE lists large fires in the mountains and foothills in 2020, 2022 and 2024. Earthquake and flood are separate policies here, and I ask for the map zones before I take a building to market.
What makes an Inland Empire apartment building different
- Two major faultsThe U.S. Geological Survey calls the San Jacinto the most seismically active fault in southern California. It branches from the San Andreas near Cajon Pass.
- Fire hazard zonesThe State Fire Marshal issued new recommended maps for local-responsibility areas in 2025, and both counties’ fire agencies moved to adopt them.
- Burn scarsRain on a burned slope moves mud and rock. A debris flow near Devore on December 25, 2003 followed that fall’s Old and Grand Prix fires.
- Santa Ana windCounty fire warnings single out the foothills and the areas below Cajon Pass and San Gorgonio Pass.
- Annual fire inspectionsState law has the fire department inspect multi-family housing, and the record follows the building.
The coverage parts are the same as anywhere in California (what goes into an apartment program). Here the location on three maps decides who will write it.
The San Jacinto and San Andreas faults
The USGS fault database describes the San Jacinto fault zone as a major element of the San Andreas system that branches off near Cajon Pass and runs southeast through the Peninsular Ranges. Its San Bernardino Valley section includes the Rialto-Colton and Loma Linda faults. Caltech’s Southern California Earthquake Data Center lists Lytle Creek, San Bernardino, Loma Linda, San Jacinto and Hemet among the nearby communities. The San Jacinto Valley section produced an earthquake of about magnitude 6.8 on April 21, 1918 and a magnitude 6.4 on December 25, 1899.
On the San Andreas, the USGS statewide forecast calls the southern section the most likely fault in California to host a large earthquake.
Earthquake is typically excluded from the property policy on an apartment building. The California Earthquake Authority’s policies are for homeowners, condo unit owners, mobilehome owners and renters, so the building needs a commercial earthquake or difference-in-conditions policy with its own deductible. Underwriters price it on distance to the fault, soil, year built and any tuck-under parking. How earthquake insurance works in California.
Foothill fire zones and Santa Ana wind
Fire Hazard Severity Zones rate land as Moderate, High or Very High. The Riverside County Fire Department notes that the maps show hazard, not risk: they do not credit defensible space or fire-resistant construction. The State Fire Marshal issued the 2025 recommended local-responsibility maps for Riverside County on March 24, 2025, and the San Bernardino County Fire Protection District’s board adopted its zone ordinance on June 10, 2025.
CAL FIRE’s incident pages show why the foothills are underwritten differently from the valley floor:
- Line Fire, September 2024: 43,978 acres, starting north of the City of Highland.
- Bridge Fire, September 2024: 56,030 acres in Los Angeles and San Bernardino counties, with 81 structures destroyed.
- Airport Fire, September 2024: 23,526 acres in Orange and Riverside counties, with 160 structures destroyed.
- Fairview Fire, September 2022: 28,098 acres near Hemet.
- El Dorado Fire, September 2020: 22,744 acres in San Bernardino and Riverside counties, west of Oak Glen.
A red flag warning posted by San Bernardino County Fire describes the most critical fire weather along the foothills of the two counties’ mountains and below Cajon Pass and San Gorgonio Pass. For a building in or near a mapped zone, I send the zone, the distance to brush, the roof type and the clearance photos with the submission.
Flash flood and debris flow below burn scars
The fire is not the end of the exposure. The USGS documents a major post-wildfire landslide near Devore, in San Bernardino County, on December 25, 2003, after the Old and Grand Prix fires burned through the San Bernardino Mountains that fall. In 2021 the agency reported that post-wildfire landslides are becoming more frequent in Southern California.
Flood and mudflow are typically excluded from a commercial property policy. If a building sits at the mouth of a canyon or below a slope that burned, ask before the winter how the policy treats water, mud and debris, and whether a separate flood policy is needed. How flood insurance works.
Fire inspections and city programs
The City of Moreno Valley’s fire department explains the state rule plainly: Health and Safety Code section 13146.2 has the fire department inspect multi-family housing for compliance with the California Fire Code, on a routine annual basis. The items it lists are the ones that also show up in fire claims: smoke and carbon monoxide alarms, clearance around heat-producing appliances, extinguishers, exits and fire department access. The owner is responsible for clearing violations, including those inside a tenant’s unit.
The City of San Bernardino’s municipal code has carried a “crime-free” multi-housing program for apartment owners. In August 2023 the Attorney General announced a settlement with the City, in the form of a proposed stipulated judgment, under which the City agreed to stop enforcing and repeal the crime-free lease addendum and related provisions, and to keep only a mandatory eight-hour class and annual exterior inspections. If a lender or an old checklist still asks for a crime-free certificate, check with the City on what the program requires today.
Send me the latest fire inspection report and proof that the items were cleared. It is the quickest way to show a liability underwriter the building is looked after.
Rent law, loss of rents and balconies
Most apartment units in both counties fall under the statewide Tenant Protection Act: rent can rise over 12 months by no more than 5 percent plus the change in the cost of living, or 10 percent, whichever is lower, and ending a tenancy after 12 months takes just cause. Units whose certificate of occupancy was issued within the past 15 years are outside the law, so check the date on newer buildings. When a tenant moves out, the owner may set the starting rent for the next one.
Loss of rents pays the rent you were actually collecting while the building is repaired. After a regional event such as an earthquake or a fire, contractors and permits are slow, so I look at whether the period of coverage is long enough, not only the limit.
Buildings with three or more units and wood-supported balconies, decks, stairs or walkways more than six feet above the ground were due for a first state-required inspection by January 1, 2026, repeated every six years. Underwriters ask for the report.
When the standard market says no
A building inside a Very High zone, or one with a wood shake roof or brush close by, may be declined by admitted carriers. Surplus lines carriers are next. If they pass, the California FAIR Plan writes habitational buildings of five or more units on a named-peril commercial policy covering fire, lightning and internal explosion, with vandalism as an option. It is usually paired with a difference-in-conditions policy, and liability is bought separately. How the FAIR Plan and DIC fit together.
What to send me
- Address, year built, stories, unit count and construction type, including any tuck-under parking.
- Map zones: the fire hazard severity zone, the FEMA flood zone, and whether the parcel is in an earthquake fault zone.
- The current rent roll and a recent operating statement.
- Current declarations pages for property, earthquake, flood, liability and umbrella.
- Five years of loss runs, with what was repaired.
- System updates with years: roof and roof type, plumbing, electrical, and heating and cooling.
- Inspection history: the latest fire inspection, the balcony inspection report, and brush clearance photos for foothill buildings.
Common questions
Who insures apartment buildings in Riverside and San Bernardino?
Admitted carriers write most valley-floor buildings, surplus lines carriers take older or foothill ones, and the California FAIR Plan writes habitational buildings of five or more units when the others decline. As an independent broker I match the building to the market.
Do I need earthquake insurance on an apartment building in the Inland Empire?
It is not required by law, though a lender may ask for it. The San Jacinto and San Andreas faults both run through the region, and earthquake is typically excluded from the property policy.
Why did my apartment insurance go up in San Bernardino or Riverside County?
Often because of where the building sits on the fire hazard maps, which were updated in 2025, along with roof age and prior losses. Sending the zone, roof type and clearance photos lets me shop it properly.
Does my apartment policy cover mud or debris flow after a wildfire?
Usually not. Flood and mudflow are typically excluded from commercial property policies, so a building below a burn scar should be reviewed for separate flood coverage before the rainy season.
Is San Bernardino’s crime-free housing program still required?
Not in its old form. Under a settlement the Attorney General announced in 2023, the City agreed to drop the crime-free lease addendum and related rules and keep a mandatory class and annual exterior inspections; confirm current requirements with the City.
Does the fire department inspect my apartment building every year?
State law has fire departments inspect multi-family housing for fire code compliance, and cities such as Moreno Valley describe the inspections as routine and annual. Keep the report, because underwriters ask for it.
Is my building in a fire hazard severity zone?
Check the map your city or county fire agency adopted in 2025. The zones rate hazard as Moderate, High or Very High and do not give credit for defensible space or fire-resistant construction.
General information about insuring apartment buildings in Riverside and San Bernardino counties as of November 2026, not legal advice. Fire hazard zones, inspection programs and rent rules are set by state law and local ordinance and change; confirm your building’s zone with the local fire agency and your obligations with counsel. Coverage depends on underwriting and the terms, conditions and exclusions of the policy actually issued.