Amwins Program Underwriters has launched a Self-Storage Facilities insurance program as the sector's risk profile undergoes a structural shift that established program administrators built around smaller operators may not fully address. Institutional owners including publicly traded REITs now hold an estimated 45% of all US self-storage space, up sharply from two decades ago, with the four largest public REITs alone controlling roughly 30% of national inventory. That concentration of ownership has changed what self-storage insurance needs to do: large sophisticated operators with publicly reported financials face regulatory and municipal risk factors - Public Storage has estimated that Los Angeles emergency regulations will reduce its same-store revenue growth by roughly 80 basis points in 2026, while Extra Space projected a similar 40 basis point headwind from LA County restrictions - that standard program wordings designed for fragmented small-operator portfolios were not built to address.
The Amwins program covers property, general liability, excess liability, crime, equipment breakdown, non-owned and hired auto, and inland marine, alongside customers' goods legal liability and sale and disposal legal liability each up to $1 million, mobile equipment coverage, a property enhancement endorsement, and resident manager liability available on request. It is backed by an A.M. Best A-rated carrier and available on both admitted and non-admitted bases, with admitted coverage in 19 states and non-admitted availability in Florida, Georgia and New York. Retail agents and brokers can submit business with a completed industry-standard application, a supplemental application, a tenant lease agreement and five years of currently valued loss runs.
Dan Curran, executive vice president at Amwins Program Underwriters, said the program gives retail agents and brokers a straightforward way to deliver the specialised protection self-storage clients need as exposures become more complex.
The sector's scale gives the program its addressable market. US self-storage inventory reached more than 2.1 billion square feet in 2026, spread across more than 2,500 properties in various stages of development, with roughly one in three Americans currently renting a storage unit. Extra Space reported tenant insurance growth of 5% year-over-year in Q1 2026, pointing to continued demand for customers' goods coverage as a core component of the self-storage business model rather than an optional add-on.
Established program administrators including MiniCo, which has specialised in self-storage coverage for more than five decades, and IGP Specialty have long argued that standard commercial property policies fall short for the sector - self-storage exposures include customers' goods legal liability and sale and disposal liability that a typical business owner's policy does not address. Amwins enters that niche with those same specialist coverages alongside broader market access and underwriting flexibility.
Claims severity has climbed despite fluctuating theft and vandalism trends as facility security has improved - rising repair costs, supply chain pressure on materials and extreme weather are the primary drivers, even as pricing has begun to stabilise in some regions as the broader property market softens. Slip-and-fall claims remain among the leading sources of liability losses for operators particularly during wet or icy months, which is why general liability and resident manager liability are treated as core rather than optional programme components.
The analytical question Amwins' entry raises is whether the self-storage program market has kept pace with the sector's ownership transformation. A niche built around small independent operators - where MiniCo and IGP Specialty have decades of accumulated loss data and broker relationships - faces a different underwriting challenge when institutional owners controlling 30% of national inventory bring municipal regulatory risk, public financial disclosure obligations and portfolio-level exposure management to the same program structure. Amwins' distribution reach and underwriting flexibility are the specific competitive levers in a segment where the risk has become more institutionally complex than the program market originally designed for it.
