A feasibility study citing 7.8 square feet of self-storage per capita can conclude a market is oversaturated. The same trade area analyzed on StorTrack's broader facility universe can read as undersupplied. Both conclusions use real data. That is the problem with national saturation benchmarks in 2026.
MMC Group's March 2026 research on market saturation benchmarks documents a 57% spread in national per-capita figures across vendors: 6.07 (Self-Storage Almanac), 7.8 (Yardi Matrix), 8.0 (TractIQ), and 9.5 (Storage Authority and Radius+). Meanwhile, Storable Industry Pulse data from more than 30,000 facilities shows national same-store occupancy at 76.9% in Q1 2026, while REIT-managed portfolios run 92% to 93%. The industry is not one market. It is two operating tiers separated by revenue management infrastructure.
Why Do Saturation Numbers Contradict Each Other?
Saturation is a ratio: supply divided by demand. Both halves are choices. MMC Group's analysis shows Yardi Matrix tracks roughly 32,640 completed facilities, Radius+ approximately 48,000, and StorTrack more than 67,400. The same 3-mile trade area pulls a different competitive set depending on which vendor you use.
Yardi skews institutional. StorTrack catches mom-and-pop and vehicle-storage hybrids that Yardi excludes. A market near the 7.8 national threshold on Yardi data can flip to oversaturated on StorTrack counts without any change in physical supply.
DXD Capital has stated publicly that there is "a lack of correlation between higher storage prices and lower square feet per capita" at the macro level. Inside Self-Storage has documented markets at two square feet per capita with collapsing rates and markets at fifteen square feet per capita nowhere near saturation. Per-capita without local context is a quotation, not analysis.
What Does the REIT-Independent Occupancy Gap Tell Us?
Storable Industry Pulse reported 76.9% same-store occupancy nationally in Q1 2026 across more than 30,000 facilities. REIT-managed portfolios averaged 92% to 93% in the same period, per MMC Group's compilation of institutional data.
That 15-plus percentage point spread is itself a market signal. Institutional revenue management sustains occupancy in metros where independent operators are dropping rents to fill space. TractIQ's May 2026 market data shows national REIT occupancy at 84.8% in Q4 2025 and sophisticated operator occupancy at 79.8% in Q1 2026 among CMBS-reporting facilities.
Capright's June 2026 REIT update put average major-REIT occupancy at 89.9% in Q4 2025 with same-store revenue growth of just 0.1% and NOI down 1.2%. REITs are holding occupancy and revenue through ECRI and discounted street rates. Independents without those tools are bleeding occupancy in competitive submarkets.
National advertised rent fell to $16.07 per square foot annualized in March 2026, down 2% year over year, per Yardi Matrix data cited by MMC Group. TractIQ's May 31, 2026 update shows average monthly street rates at $1.55 per square foot (-1.3% YoY) and web rates at $1.28 (-0.8% YoY). Discounting remains elevated. Operators losing pricing power are disproportionately independent.
What Should Replace Per-Capita in Feasibility Studies?
MMC Group and DXD Capital converge on the same answer: rents, occupancy, and pipeline at the trade-area level.
The institutional site-selection rule MMC Group cites requires 300 to 500 age-and-income-qualified households per planned unit within a 3- to 5-mile primary trade area. That gate eliminates many tertiary markets regardless of per-capita supply figures.
Local adjustment factors are non-optional. Climate-controlled penetration, basement geology (Northeast markets absorb demand through residential basements that Sun Belt markets lack), household mobility, renter share, and unit-size mix all shift the supportable supply calculation. Manhattan units average 32 square feet; Boise units average 151 square feet, per MMC Group's market references.
Yardi Matrix forecasts 51.1 million net rentable square feet of new deliveries in 2026, approximately 2.4% of existing stock, with starts down 29% year over year in Q1 2026. TractIQ reports 6.52% of existing square footage under development, with 73.4% of projects still in conceptual or planned phase. Pipeline data matters more than a national per-capita ratio when 73% of planned projects may never break ground.
OppMap's 2026 market analysis documents the divergence by market type: top 25 metros at 85% to 89% occupancy with flat to negative rent trends, secondary markets under 100,000 population at 92% to 96% with 3% to 6% rent growth. National averages mask opposite stories.
How Are Institutional Buyers Using Better Data?
TractIQ, now the official data provider for the 2026 Self-Storage Almanac, tracks more than 70,000 facilities with street and web rate histories since 2018. Its May 2026 AI Connector pushes verified facility data into Claude and ChatGPT for underwriting workflows. The tool exists because investors recognized that saturation ratios fail under investment committee scrutiny.
Matthews Real Estate's H1 2026 national update documented REIT occupancy ranging from 84% (NSA) to 92.5% (Extra Space) while private and CMBS assets lagged near 82% on average. The bifurcation is not new. What is new in 2026 is the width of the gap at a moment when national street rates are still negative year over year.
Developers who cite 7.8 square feet per capita as proof of opportunity in a Sun Belt metro facing 6.5% of stock under construction are building feasibility studies that credit committees will challenge. Developers who pair trade-area occupancy, competitor rate trends, and pipeline phase data are building studies that survive contact with institutional capital.
The Numbers Worth Writing Down
- Per-capita benchmark range (national): 6.07 to 9.5 NRSF; ~57% vendor spread
- Facility universe variance: Yardi ~32,640; Radius+ ~48,000; StorTrack 67,400+
- Storable Industry Pulse Q1 2026 occupancy: 76.9% (30,000+ facilities)
- REIT-managed portfolio occupancy: 92% to 93% (same period)
- TractIQ street rate (May 31, 2026): $1.55 PSF/month (-1.3% YoY)
- TractIQ web rate (May 31, 2026): $1.28 PSF/month (-0.8% YoY)
- 2026 delivery forecast: 51.1M NRSF (~2.4% of stock); starts -29% YoY in Q1
- Pipeline in planning phase: 73.4% of projects under development (TractIQ)
- Secondary market occupancy (under 100K population): 92% to 96% with 3% to 6% rent growth (OppMap)
Stop Quoting Saturation. Start Quoting the Trade Area.
The self-storage industry spent decades treating per-capita supply as a universal truth. In 2026, the data vendors cannot agree within 57%, REITs and independents are 15 points apart on occupancy, and national street rates are still negative year over year.
The operators and investors winning are not asking whether the country has 7.8 square feet per person. They are asking whether a specific 3-mile ring can support their unit mix at their rate target against the actual competitors StorTrack counts, not the subset Yardi tracks.
Saturation is not a number. It is a methodology. Pick the wrong one and your feasibility study is fiction with footnotes.
Sources
- Market Saturation Benchmarks: The Hidden Denominators That Decide Whether a Feasibility Study Is Bankable, MMC Group
- Self-Storage Market Data, TractIQ
- Storable Industry Pulse Q1 2026, Storable
- Self Storage Market Trends 2026: What the Data Shows, OppMap
- National Self-Storage Market Update: H1 2026 Outlook, Matthews Real Estate
- Self-Storage REIT Update – June 2026, Capright