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Industry Primers

Bottom-up NAICS industry primers written for both public-market and private investors. Leaf industries are researched from the ground up; every group, subsector, and sector above them reads as a contrast across the industries beneath it.

2122 industries · 24 sectors · NAICS 2022

Researched with AI assistance from official U.S. statistics and independent sources, with citations on every page. Figures are not individually verified against pinned evidence — primers marked Evidence-verified are. Industry research, not investment advice. Methodology.

IndustryNAICS 53113Real Estate & Leasing

Self-Storage (NAICS Industry 53113)

NAICS 53113 — Lessors of Miniwarehouses and Self-Storage Units

An investor's primer. U.S. figures unless noted. Federal statistics are drawn from our ingested Census/SBA data. This is a rollup page for a NAICS industry that contains only one detailed industry — for the full deep dive, see the child primer for 531130.

1. Overview

Self-storage is one of the simplest real-estate businesses to understand and one of the more profitable to own. An operator builds or buys a facility of small lockable units, rents them month-to-month to households and small businesses that need space for their own belongings, and collects rent while spending very little on staff or upkeep. The customer keeps the key and hauls their own goods; the operator never takes custody of what's inside. You rent space, not a storage service — that single feature separates self-storage from warehousing.[1]

For investors it offers high property-level margins, need-based demand that holds up reasonably well through the cycle, and a hugely fragmented ownership base that scaled operators are steadily rolling up. It remains real estate, though — its value rises and falls with interest rates, it can be overbuilt locally, and it is not immune to a weak housing market.

Two ways in. Public-market investors can buy shares of a handful of large real estate investment trusts (REITs — companies that own income real estate, pay little or no corporate tax, and pass most of their income to shareholders as dividends). Private investors can buy or develop a facility outright, or invest through a fund or syndication.[1]

2. What's inside — the group equals its one child

NAICS (North American Industry Classification System) organizes the economy in a nested tree. This page sits at the 5-digit "NAICS industry" level, code 53113, one rung below the 4-digit industry group 5311 (Lessors of Real Estate) and one rung above the 6-digit national industry where the detail lives.

Here the two levels are effectively identical: 53113 contains exactly one child, 531130 (Lessors of Miniwarehouses and Self-Storage Units), which inherits the same title and definition. When a 5-digit NAICS industry has a single 6-digit child, the U.S. and its NAICS partners simply repeat the code with a trailing zero rather than subdividing it — so every establishment, dollar, and firm counted at 53113 is the same set counted at 531130. There is no aggregation across multiple sub-industries to do here.

What that means for you: this page carries only the federal rollup numbers and the shape of the opportunity. For the full treatment — the public REIT scorecard, how rent and occupancy convert to net operating income and value, demand drivers, the state lien laws that govern the business, the consolidation math, and the risk list — read the child primer for 531130. Everything below is a summary that points there.

3. Size (this level's federal figures)

Because 53113 and 531130 are the same industry, this level's ground-truth federal statistics are identical to the child's. From our ingested Census data:

Employer-business picture — County Business Patterns, 2023:[2]

  • Establishments (with employees): 18,564
  • Paid employees: 48,382
  • Annual payroll: $1.96 billion (first-quarter payroll $485 million)

That is roughly 2.6 employees per site — a strikingly thin payroll, because most facilities run on one lean on-site manager or are managed remotely with no staff on site.

Receipts and firms — 2022 Economic Census:[3]

  • Receipts (employer establishments): $20.6 billion
  • Firms (with employees): 8,946

The undercount caveat — read this before using any single number. Federal business statistics count employer establishments and firms. They systematically undercount self-storage, where a large share of facilities are unmanned or owned by individuals and pass-through entities (LLCs, partnerships) with no payrolled staff. Census counts ~18,600 employer establishments and ~8,900 firms, while trade sources count ~49,000–52,000 physical facilities holding ~2.1 billion rentable square feet (there is no authoritative federal facility count).[7] Whole-industry rental revenue is likewise larger than the federal figure: trade and analyst estimates run roughly $39–44 billion (IBISWorld models ~$39 billion for 2026) versus the ~$20.6 billion federal employer benchmark — the gap being the non-employer/individual-owner tail.[6][7] Use the federal figures for the formal, professionally-run core; use the trade figures for the physical asset base and total rents — and don't mix the two. The child primer works through this reconciliation in detail.[7]

Small-business threshold. The Small Business Administration's (SBA) size standard for this industry is $34.0 million in average annual receipts, so nearly all of the ~52,000 facilities qualify as small businesses while the listed REITs are orders of magnitude larger.[5]

4. The investable universe

The value concentrates in a small set of listed "pure play" REITs sitting atop a deep private market. In brief (full scorecard, multiples, and yields are in the 531130 primer):[9][10][11][12][13][14][15]

  • Public REITs: Public Storage (PSA), Extra Space Storage (EXR), CubeSmart (CUBE), National Storage Affiliates (NSA — pending acquisition by PSA), and SmartStop Self Storage (SMA); plus tiny Global Self Storage (SELF). U-Haul Holding (UHAL) is a hybrid that bolts a national moving-truck fleet onto ~99M sq ft of storage.
  • Private and institutional owners: the roughly 65% of facilities outside the top 100 operators — and most of the physical square footage — is held privately by roll-up platforms (Prime Group Holdings, StorageMart, SROA Capital, William Warren Group/StorQuest, and others), pension funds, insurers, and, at the long tail, thousands of individual and family owners of single sites.[7][9]

The single biggest recent event: in March 2026 Public Storage agreed to acquire National Storage Affiliates in an all-stock deal valued at roughly $10.5 billion (expected to close in Q3 2026), which would remove one of the five listed pure plays.[18]

5. How the money works

The economics run rent → occupancy → net operating income → cap-rate valuation → leverage, and for listed owners through the REIT structure. In short:[10][11][16]

  • Rent and occupancy. Revenue is rentable square feet × occupancy × achieved rent, plus ancillary income. Leases are month-to-month, so operators quote a cheap move-in "street rate" to fill units, then raise sitting tenants over time — a practice called ECRI (existing-customer rate increases) that is the sector's core pricing engine.[8][11]
  • NOI and margins. Because labor and upkeep are light, mature facilities convert a large share of revenue into NOI (net operating income — property revenue minus property operating expenses, before depreciation, interest, and corporate overhead); the big REITs run ~71–78% property margins.[10][11]
  • Cap rates and value. A property is worth roughly its stabilized NOI ÷ a cap rate (capitalization rate — the market's required income yield). Small cap-rate moves swing value hard, and with typical leverage they swing owners' equity harder — which is why interest rates dominate returns.
  • The REIT structure. A REIT owes little corporate tax if it distributes at least 90% of taxable income. Because accounting rules depreciate buildings that actually hold their value, investors judge these companies on FFO (funds from operations — net income with real-estate depreciation added back), AFFO (adjusted FFO), and price-to-NAV (net asset value) rather than price-to-earnings.[20]

Where the one child would "diverge" — it doesn't, but note the hybrid. Since 53113 has a single child, there is no divergence between sub-industries. The only split within the industry is between pure-storage owners and the one hybrid, U-Haul, whose results also turn on truck/trailer utilization and vehicle resale (residual) values — fleet economics that belong in a U-Haul thesis, not a Public Storage one.[14] The 531130 primer covers all of this in full.

6. Demand drivers

Demand is need-based and reasonably resilient, but not recession-proof. The main drivers (detailed in the child primer):[8][19][7]

  • Housing turnover and mobility — moving is the single biggest trigger (Census data show 11.8% of Americans changed residence in 2024); a frozen housing market softens demand.
  • The "four D's" — death, divorce, downsizing, dislocation — non-discretionary life events that provide a baseline through the cycle.[8]
  • Housing size and density — smaller apartments, urban living, and more renters push storage off-site.
  • Small-business and e-commerce use — contractors and online sellers storing inventory.
  • Penetration runway — roughly 10% of U.S. households use storage today, which operators argue can grind higher (a judgment, not a certainty).[8]

7. Regulation

Self-storage carries a lighter regulatory load than residential real estate. A storage rental is commercial space, not a dwelling, so apartment eviction, habitability, and rent-control rules generally don't apply. Instead, nearly every state has a Self-Service Storage Facility Act giving the operator a statutory lien on stored goods and the right to auction the contents after default and proper notice (why "storage auctions" exist).[20] Overlaid on top are consumer-protection, debt-collection, and advertising rules; ADA (Americans with Disabilities Act) design standards for customer areas; tenant-insurance licensing; and — the real throttle on new supply — local zoning. Listed owners must also keep REIT tax qualification and file full SEC disclosure. The child primer details the lien mechanics and the ECRI/price-gouging rules.[20]

8. Consolidation

Self-storage is the textbook fragmented industry consolidating toward institutions — and this level's federal data proves the fragmentation even within its formal core. From the 2022 Economic Census:[3]

Measure (employer firms, 2022) Value
Firms 8,946
Top-4 share of receipts (CR4) 42.7%
Top-8 (CR8) 52.5%
Top-20 (CR20) 58.8%
Top-50 (CR50) 64.0%
Herfindahl-Hirschman Index (HHI) 606

HHI is a standard concentration gauge; the U.S. Department of Justice treats below 1,500 as "unconcentrated." An HHI of just 606 confirms a fragmented industry. Note the subtlety the child primer unpacks: the top four firms take 42.7% of employer receipts but only ~22% of physical square footage, because the big REITs dominate the staffed, professionally-managed revenue that federal surveys capture while the enormous tail of unmanned, individually-owned facilities barely registers. With ~52,000 facilities and the top 100 operators running only ~35% of them, the acquisition runway is deep — and the ~$10.5 billion PSA–NSA merger shows the roll-up now reaching the listed tier itself.[3][7][9][18]

9. Risks

The full risk list is in the 531130 primer; the headline risks are:[8][17][19]

  1. Interest rates (dominant). As a cap-rate-valued asset, self-storage moves inversely to rates: higher rates expand cap rates, cut property values, raise debt costs, and suppress home sales. The listed REITs are partly insulated (mostly fixed-rate, unsecured debt) but their shares still de-rate when long rates rise; private owners with floating or near-maturity loans are most exposed.[17]
  2. Occupancy and pricing. Move-in rents swung up ~40% then down ~15% from peak between 2020 and 2024; operators can defend occupancy only by discounting or by pushing ECRI harder.[8]
  3. Oversupply. Storage is cheap and quick to build, and approvals granted in a strong market open after demand cools — a persistent local risk, heaviest in Sunbelt metros.[19]
  4. Development lease-up. A new facility can sit below stabilized occupancy for years while still paying taxes, interest, and marketing.[10][19]

One risk this sector largely avoids: the residual/resale-value risk that plagues equipment and vehicle lessors — self-storage owns land and buildings, not a depreciating fleet.

10. How to invest & outlook

Public route. The clean listed exposures are PSA, EXR, CUBE, NSA (while its merger is pending), and SMA; UHAL bundles storage with fleet economics. Buy for dividend income plus FFO growth, and value on price-to-Core-FFO/AFFO, dividend yield, AFFO payout ratio, and price-to-NAV — not price-to-earnings.

Private route. Options run from buying a single stabilized facility (often under a REIT's third-party management), to ground-up development, to real-estate private-equity funds, non-traded REITs, syndications, and Delaware Statutory Trusts (DSTs — fractional vehicles used to defer capital-gains tax in a 1031 exchange). Underwrite the trade area — competing and planned square footage, in-place vs. advertised rents, and debt-service coverage under a higher refinancing rate.

Outlook (a judgment, not a forecast). The 2026 setup looks like a bottoming process rather than a clean recovery: advertised rents were still slipping and a frozen housing market kept demand subdued, but a shrinking construction pipeline should ease local oversupply as home turnover normalizes.[19] The interest-rate path is the swing factor — falling long rates would compress cap rates and re-rate the public names; a renewed spike would do the reverse.

Bottom line. Because NAICS 53113 is a single-child pass-through, everything here applies identically to 531130 — go there for the full primer. Self-storage earns its reputation as a high-margin, low-labor, need-based real-estate niche with a lighter regulatory load than apartments and a long consolidation runway, but its returns are still governed by real-estate fundamentals. The real protection isn't the "recession-resistant" label — it's a strong trade area, a defensible purchase price, modest leverage, and a balance sheet that can survive a slow lease-up or a hard refinancing.

Sources

Drawn from the child primer for 531130; see that page for the complete, annotated source list.

  1. U.S. Census Bureau, 2022 NAICS Definition: 531130, Lessors of Miniwarehouses and Self-Storage Units (definition, hierarchy, single-child structure, exclusions). https://www.census.gov/naics/?details=531130&input=531130&year=2022
  2. U.S. Census Bureau, County Business Patterns, 2023 (531130/53113: 18,564 establishments; 48,382 employees; ~$1.96 billion annual payroll; $485 million Q1 payroll). [Histometrics ingested federal statistic.] https://data.census.gov/table/CBP2023.CB2300CBP
  3. U.S. Census Bureau, 2022 Economic Census — concentration and summary statistics, NAICS 531130 ($20.615 billion receipts; 8,946 firms; CR4 42.7%, CR8 52.5%, CR20 58.8%, CR50 64.0%; HHI 606). [Histometrics ingested federal statistic.] https://data.census.gov/table/ECNBASIC2022.EC2253BASIC
  4. U.S. Small Business Administration, Table of Small Business Size Standards (531130: $34.0 million average annual receipts). [Histometrics ingested federal statistic.] https://www.sba.gov/document/support-table-size-standards
  5. IBISWorld, NAICS 531130: Lessors of Miniwarehouses and Self-Storage Units (whole-industry revenue ≈ $39 billion, 2026). https://www.ibisworld.com/classifications/naics/531130/
  6. 2024 Self-Storage Almanac / Self Storage Association / SpareFoot (~49,000–52,000 facilities; ~2.1 billion rentable sq ft; top-100 operators ≈60% of sq ft, ~35% of properties). https://www.sec.gov/Archives/edgar/data/1852575/000119312525081500/d845928dars.pdf
  7. CBRE Investment Management, Self-Storage Investing: Unpacking a Sector on the Move (2024) (~10.2% household penetration; ECRI >10%/yr; four D's; occupancy/rent dynamics 2020–24). https://www.cbreim.com/insights/articles/self-storage-investing-unpacking-a-sector-on-the-move
  8. RentCafe, The 100 Largest Self-Storage Companies in the U.S. and Public Storage 2025 10-K ownership disclosures (public share of facilities; PSA ~9% of sq ft; ~65% outside top 100). https://www.rentcafe.com/blog/self-storage/the-100-largest-self-storage-companies-in-the-u-s/
  9. Public Storage, Form 10-K, FY2025 (SEC) (scale, same-store revenue/NOI, ~9% U.S. share, REIT distribution). https://www.sec.gov/Archives/edgar/data/1393311/000162828026007696/psa-20251231.htm
  10. Extra Space Storage, Form 10-K, FY2025 (SEC) (store count, 330M sq ft, occupancy 92.6%, occupied vs. new-lease rent, third-party management). https://www.sec.gov/Archives/edgar/data/1289490/000128949026000011/exr-20251231.htm
  11. CubeSmart, Form 10-K, FY2025 (SEC). https://www.sec.gov/Archives/edgar/data/1300485/000129867526000010/cube-20251231x10k.htm
  12. National Storage Affiliates Trust, Form 10-K, FY2025 (SEC); private roll-up platform disclosures. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001618563
  13. U-Haul Holding Company, Fiscal 2026 Financial Results (99.0M sq ft storage; ~$972M storage vs. $3.812B moving-equipment rental revenue). https://investors.uhaul.com/
  14. SmartStop Self Storage REIT, Form 10-K, FY2025 (SEC) (NYSE listing April 2025). https://www.sec.gov/Archives/edgar/data/1585389/000119312526082573/ck0001585389-20251231.htm
  15. Nareit, Self-Storage REITs: Soft Fundamentals but Disciplined Balance Sheets (~82% fixed-rate, ~94.8% unsecured debt), 2025. https://www.reit.com/news/articles/self-storage-reits-soft-fundamentals-but-disciplined-balance-sheets-
  16. Public Storage & National Storage Affiliates, Public Storage to Acquire National Storage Affiliates (all-stock, ~$10.5 billion; expected Q3 2026 close), March 16, 2026. https://investors.publicstorage.com/news-events/press-releases/
  17. Yardi Matrix, Self Storage National Report, May 2026 (advertised rents; under-construction pipeline; Sunbelt concentration). https://www.yardimatrix.com/publications/download/file/8693-MatrixSelfStorageNationalReport-May2026
  18. Self Storage Association, State Lien & Tenant-Insurance Laws; Florida Statutes §83.805; U.S. DOJ, ADA Title III Regulations; California price-gouging cap. https://www.selfstorage.org/Advocacy/Legal-Resource-Center
  19. U.S. Census Bureau, American Community Survey geographic-mobility data, 2024 (11.8% of Americans changed residence in 2024). https://www.census.gov/topics/population/migration/guidance/acs-1yr.html
  20. U.S. Code, 26 U.S.C. §857 — Taxation of REITs (90% distribution requirement); Nareit glossaries, FFO, AFFO, NOI. https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title26-section857

Data-vintage notes: establishment, employment, and payroll figures are Census County Business Patterns 2023 (primary)[2]; receipts and concentration ratios are the 2022 Economic Census (primary)[3] — both Histometrics ingested federal statistics and identical for 53113 and its sole child 531130. Facility count, square footage, and household penetration are 2024 trade/analyst estimates, directionally reliable but not federal[7][8]. Company figures are FY2025 SEC filings[10]–[15]; the PSA–NSA merger was announced but not closed as of this writing[18]. Whole-industry revenue (~$39–44 billion) runs above the ~$20.6 billion federal employer-receipts benchmark because federal surveys undercount the large non-employer/individually-owned tail. This is a single-child rollup page — for full detail see the 531130 primer.