Hi Steve,
California insurers are generally allowed to use objective underwriting standards that relate to the risk of loss, including proximity to a fire hydrant, fire station access, road conditions, and other wildfire-related factors. These standards must be applied consistently and comply with California insurance regulations.
If you believe the insurer’s information is inaccurate – for example, the hydrant distance was measured incorrectly, a water source was overlooked, or other fire-protection features were not considered – you can ask the insurer to review or reconsider the underwriting decision and provide any supporting documentation regarding your dedicated fire-suppression water supply and local fire protection resources.
California regulations require underwriting rules to be based on objective factors and applied uniformly. (See California Code of Regulations, Title 10, §2360.0 et seq.) Whether the insurer must consider alternative water sources or mitigation measures depends on its filed underwriting guidelines.
If the insurer will not reconsider the decision and you believe the underwriting determination was based on incorrect information or was applied unfairly, you may contact the California Department of Insurance for assistance and guidance.
Good luck, Joel