Self‑storage now blankets New York with roughly 24 million square feet of unit space, according to listing service StorageCafe. In the past five years developers added 3.5 million square feet, pushing the average monthly rent to $205. The surge reflects New Yorkers’ need to offload belongings that no longer fit in apartments measured in dozens of square feet.

Retired librarian Ross Day rents a unit for $338.20 a month to house nearly 3,000 license plates, about 1,500 of which he displays. Fellow renters include Alison Colby, who stores vintage typewriters and family china, and Sharon Boucher‑Turner, whose collection of 200 mugs fills a separate locker. Each unit acts as a personal museum for items ranging from Depression‑glass cake plates to a writing desk deemed a good‑luck charm.

Investors watch the sector because storage leases generate steady cash flow despite volatile real‑estate markets. With over 24 million square feet in the city, operators can command premium rates that outpace typical residential rents, bolstering earnings per square foot. The trend suggests that as housing costs climb, demand for off‑site storage will sustain revenue growth for owners of these facilities.