MINEOLA, Texas, Sept. 9, 2026 — Marcus & Millichap (NYSE: MMI), a leading commercial real estate brokerage firm specializing in investment sales, financing, research and advisory services, announced today the sale of Castlerock Storage, a 614-unit self-storage facility.

“This transaction is a great example of the full cycle of a successful self-storage investment,” said Danny Cunningham, senior managing director investments. “We originally sold the property to our client in 2018, and over the past eight years he significantly increased the value through improved operations. With much of that value realized, he decided it was the right time to sell and redeploy the proceeds into another opportunity. We’ve worked with him on acquisitions and dispositions for roughly a decade, so it was great to help him complete another successful transaction.”

Cunningham and Brandon Karr, investment specialists in Marcus & Millichap’s Fort Worth office, exclusively marketed the property on behalf of the seller, a California-based self-storage investor and long-time client of the firm. Cunningham and Karr also procured the buyer, a Carolinas-based self-storage investment group utilizing a distinctive acquisition strategy centered around the installation of solar panels and the associated tax credits. The buyer has been particularly active in secondary and tertiary markets across Texas and the Southwest and has now completed multiple acquisitions through Cunningham and Karr.

The property is located at 1113 County Road 2220 near Lake Holbrook, northwest of Mineola. Built in 1998 and expanded in 2021, the facility totals 96,900 rentable square feet across 19 single-story buildings on 7.53 acres. The property includes 614 units comprising traditional drive-up storage, climate-controlled storage, and office/warehouse spaces, along with gated access and perimeter fencing.

# # #