Andover Properties announced on September 29, 2026 that its Storage King USA portfolio surpassed 15 million net rentable square feet and 100,000 self-storage units, per PR Newswire. The milestone covers more than 175 facilities in 20 states and confirms Andover as one of the largest private owner-operators in the country, even as public REITs grab billion-dollar headlines.
What Changed on September 29, 2026?
The release is a scale marker, not a single-deal announcement. Andover crossed both 15 million square feet and 100,000 units under the Storage King USA brand, reflecting cumulative acquisitions, development, and rebrands since the firm was founded in 2003.
| Metric | Reported scale (Sept. 29, 2026) |
|---|---|
| Net rentable square feet | >15 million |
| Units | >100,000 |
| Facilities | >175 |
| States | 20 |
| Brand | Storage King USA |
The firm also operates in manufactured housing, RV parks, small-bay industrial, and car washes, but self-storage is the headline growth engine behind the September milestone.
Why Does Private Scale Matter in a REIT-Heavy Sector?
Public REITs own the narrative on earnings calls and guidance raises. Private platforms like Andover compete on operating cadence and roll-up velocity in secondary markets where mom-and-pop sellers still dominate transaction volume.
President and CEO Brian Cohen tied the milestone to discipline through multiple cycles:
Reaching this milestone is a reflection of the platform we've spent more than two decades building. We've always believed that the best way to build a durable real estate business is to stay disciplined in how we invest and continuously improve how we operate.
Chief Investment Officer Zach Harding added a data angle that public competitors also cite, but from a private portfolio lens:
Our scale allows us to see the market differently. We can identify trends across our entire portfolio, encompassing tens of thousands of customers, then use those insights to make better decisions that range from operations to acquisition sourcing.
That language aligns with Colliers and Green Street's September view that stabilization, not a demand surge, defines 2026. Operators win by execution and sourcing, not by waiting for national street rates to flip positive.
How Did Andover Reach 100,000 Units?
Andover's playbook is consistent across 2026 trades:
- Buy from independent owners in markets with limited new supply.
- Rebrand under Storage King USA and centralize revenue management.
- Run capital markets and property management in-house to capture fees and margin.
The September 10 Leominster, Massachusetts, acquisition added nearly 800 units and 62,000 square feet in Central Massachusetts. Earlier 2026 deals included Denver metro portfolio expansion and Garner, North Carolina, buys documented in prior releases.
None of those individual trades move national indices. Together they compound into a 100,000-unit footprint that rivals mid-cap REITs on unit count while staying private.
Who Else Was Scaling the Same Week?
September 29, 2026 was a busy day for capital deployment narratives:
- SmartStop outlined roughly $140 million of strategic investments and raised guidance, per its investor release covered in our SmartStop Deca analysis.
- U-Haul / AMERCO closed on the Wantage, New Jersey, mixed-use campus with a CubeSmart-managed storage wing, per Matthews' disposition release.
Andover's milestone sits between those stories: less flashy than a REIT press package, more structural than a single 1031 trade. It shows private equity of operating skill still aggregating square footage while Trepp warns securitized borrowers face refinancing sensitivity on legacy coupons.
What Should Smaller Operators Take Away?
Scale is a data product. Harding's comment about tens of thousands of customers is not marketing fluff. Portfolio-wide pricing and marketing tests require unit count.
Secondary markets still feed roll-ups. Leominster is not Manhattan. Andover keeps buying where independent owners exit and operating uplift is measurable.
Private does not mean slow. Crossing 100,000 units in 23 years implies sustained acquisition pacing through the 2021-2022 development boom and the 2024-2026 rate normalization period.
Liquidity exists for sellers. The same week Andover celebrated scale, family offices and strategics closed hybrid and suburban assets. If you operate well, capital is available even when advertised rates remain negative year over year nationally.
The Numbers Worth Writing Down
- >15 million SF: Storage King USA net rentable square feet as of September 29, 2026.
- >100,000 units: portfolio unit count at the milestone announcement.
- >175 facilities: site count across 20 states.
- 2003: Andover founding year cited in the release.
- 23 years: approximate platform age at the milestone.
- 4 sectors: self-storage plus manufactured housing, RV, industrial, and car washes in the broader firm.
Private Platforms Are the Sector's Quiet Consolidators
REITs will always win the CNBC segment. Andover's September 29 milestone is the counterweight: a private, vertically integrated machine crossing 100,000 units without issuing a single press release about forward equity or Maple bonds.
For practitioners, that is the 2026 industry structure in one data point. Public companies set pricing psychology on earnings day. Private firms like Andover set unit count and operating depth in the markets where most Americans actually rent storage units.
Sources
- Andover Properties' Storage Portfolio, Storage King USA, Surpasses 15 Million Square Feet and 100,000 Self Storage Units, PR Newswire, September 29, 2026
- Andover Properties Leominster Massachusetts Acquisition, Your CAIO, September 2026
- U-Haul Wantage Plaza Route 23 Acquisition, Your CAIO, October 2026