Argus Self Storage Advisors' June 2026 Market Monitor reports stabilized self-storage assets in urban markets trading at high-4% to low-5% cap rates, while lease-up and certificate-of-occupancy deals sell below replacement cost. The data comes from an early-June investment webinar featuring Paul Spittle, senior vice president of acquisitions at Public Storage; Liz Schlesinger, founder and CEO of Merit Hill Capital; and James Denissen, partner and head of acquisitions at Baranof Holdings.
The panel convened as national street rates averaged $133 per month in May 2026, unchanged month over month and down 2.2% year over year, per RentCafe. Argus framed the environment as "slow to no growth combined with elevated new supply." Buyers are still competing aggressively for the right assets. They are just far more selective about which assets qualify.
Is Self-Storage Past the Bottom?
Panelists agreed demand is improving slightly in most markets, but markets with active new supply have not bottomed. Soft rental rates and slow lease-ups persist wherever deliveries outpace household formation.
Until housing sales accelerate and population growth drivers strengthen, panelists expect limited change in storage demand velocity. New development remains a drag. All three acquirers said almost no new development pencils today.
That aligns with Yardi Matrix's Q2 2026 supply forecast showing construction starts down 29% in Q1 and Capright's June REIT update documenting 89.9% average occupancy with a 69% contract-street rent gap at Public Storage. Stabilization is real at the portfolio level. Pricing power in oversupplied submarkets is not.
Spittle, Schlesinger, and Denissen each described the market in a single word: Transformation, Stagnant, and Recalibrating. Three senior acquirers, three different lenses on the same data.
Where Are Active Buyers Deploying Capital?
Stabilized deals in dense urban submarkets continue to command premiums. Lease-up and C-of-O assets face pricing discovery because stabilized rent assumptions are unreliable.
Single-story drive-up properties lead demand. Tenants prefer them over multi-story projects. Larger unit sizes are also favored as customers seek value per dollar. Panelists cited ideal unit mixes averaging 115 to 150 square feet.
Baranof's June activity illustrates the playbook. Inside Self-Storage reported the firm acquired a South Tampa StorQuest for $8.25 million in June 2026, while Merit Hill closed a $12.35 million Westborough, Massachusetts asset the same month. Baranof targets value-add and stabilized assets in high-growth Sun Belt corridors. Merit Hill chases Northeast infill with REIT management partnerships. Both are executing the Argus panel's stated preference for operational certainty over speculative lease-up.
Institutional equity continues to flood the sector. Panelists cited allocators diversifying out of office and other large-ticket asset classes, plus retail investors who may not fully price current operating headwinds. That equity overhang supports cap rates on premium assets even when fundamentals are soft.
How Wide Is the Cap Rate Spread Between Major and Secondary Markets?
Argus panelists said the spread between top-50 MSA deals and everything else is wider than it has been in decades.
A stabilized major-market asset pricing in the low-5% range might see a secondary-market comparable at 6.75% to 8.5%, a 175- to 350-basis-point premium. Tertiary markets price higher still. New supply in smaller markets can be "even more devastating" because population and economic growth are capped.
May 2026 RentCafe data showed 30% of the 150 largest U.S. cities posting positive year-over-year street rates, up from 28% in April. The national average still declined 2.2% annually. Market selection within the Argus cap-rate framework matters more than the national headline.
Panelists emphasized that cap rates must be calculated with industry-standard expenses: off-site management fees, realistic payroll, advertising, insurance, and repairs. Aggressive seller pro formas inflate yields. Buyers who underwrite to actual operating costs see the secondary-market premium as compensation for thinner liquidity and higher supply risk, not a free lunch.
What Role Does AI Play in Acquisitions and Operations?
All three panelists reported using AI to increase staff productivity and accelerate initial underwriting. None said AI replaces submarket due diligence.
AI is widening operating margins for the largest operators through real-time data analysis, according to the panel. Public Storage's PS Next platform and Extra Space's revenue systems exemplify the scale advantage. Panelists expect AI to eventually level the playing field for sophisticated mid-market operators, but the gap remains in June 2026.
On management models, 100% remote operations have underperformed. Customers often face stressful circumstances when renting storage and want human contact. Hub-and-spoke models with clustered sites are gaining traction because large operators can staff efficiently, leverage marketing across markets, and share technology infrastructure.
What Does New Supply Mean for Existing Operators?
Panelists warned that new supply continues to outpace demand creation in many markets. Some submarkets may never recover post-COVID peak rents, or may take 10-plus years as population growth caps.
During the 2008 financial crisis, fewer than 200 new self-storage properties were built per year. Today, projects still break ground where stabilized valuations struggle to reach replacement cost. Panelists blamed misinformed developers, lenders, and investors chasing storage exposure without submarket discipline.
The consequence is equity and lender losses in overbuilt corridors. Argus closed $500 million in 2025 self-storage sales as the 2026 deal market stayed open despite soft fundamentals. Liquidity exists. Underwriting discipline determines who captures it.
The Numbers Worth Writing Down
- Stabilized urban cap rates: High-4% to low-5% (Argus June 2026 panel)
- Secondary market premium: 175-350 basis points above major markets (6.75%-8.5% vs. low-5%)
- Preferred unit mix: 115-150 SF average unit size; single-story drive-up highest demand
- Lease-up/C-of-O pricing: Below replacement cost in most trades
- New development: Panelists say almost nothing pencils; GFC-era builds fell below 200 properties/year
- National street rates (May 2026): $133/month average, flat MoM, -2.2% YoY (RentCafe)
- Panel one-word summaries: Transformation (Spittle), Stagnant (Schlesinger), Recalibrating (Denissen)
Equity Is Chasing Quality, Not Quantity
The Argus June 2026 panel makes the 2026 investment market legible. Stabilized urban assets still trade at institutional cap rates because equity must deploy and barriers to entry protect cash flow. Lease-up and secondary-market assets price in uncertainty with wide spreads and replacement-cost discounts.
Baranof, Merit Hill, and Public Storage are not sitting out. They are filtering harder. Drive-up product, larger units, dense submarkets, and hub-and-spoke operations win. Remote-only experiments and multi-story lease-ups lose.
If you are underwriting acquisitions this summer, the Argus cap-rate spread is the map. National averages tell you almost nothing about whether your deal clears.
Sources
- Market Monitor Issue VI-2026, Argus Self Storage Advisors
- May 2026 Self Storage Report, RentCafe
- Self-Storage REIT Update – June 2026, Capright
- Self-Storage Real Estate Acquisitions and Sales: June 2026, Inside Self-Storage