Construction crews deploy excavators to shield California coastal homes from waves

Permanent or semi-permanent coastal defense infrastructure (seawalls, living shorelines, managed retreat policies) would likely reduce long-term uncertainty for insurers and property valuations in affected zones, though remediation costs could remain substantial.

Continued ad-hoc defensive measures without systemic policy response would plausibly keep coastal property risk pricing volatile, with insurers maintaining elevated premiums and withdrawal from high-erosion zones, while property values in vulnerable areas face persistent downward pressure.

Accelerating erosion outpacing defensive efforts could trigger insurance market contractions, forced property abandonments, and cascading effects on municipal tax bases and mortgage-backed securities tied to coastal real estate, creating broader financial stability concerns.