National self-storage advertised rates fell 2% year-over-year in March 2026, a steeper drop than the 1.2% and 0.4% declines logged in February and January. Nearly every metro in the Yardi Matrix top-30 list posted negative annual growth in March. That consistency creates a misleading picture. The national number is a weighted average of two markets performing in opposite directions for entirely different structural reasons.
The Sun Belt is dragging the average down. The coastal markets with genuine supply constraints are, in select cases, still growing rates. The gap between those two outcomes is not a temporary weather pattern in the data. It is a reflection of cumulative development decisions made between 2020 and 2024 that are now fully priced into both supply pipelines and investor underwriting.
Understanding the split matters whether you are an operator managing a Phoenix lease-up, an investor evaluating a Charlotte acquisition, or a manager in Boston trying to figure out how long the pricing power holds.
Which Sun Belt Markets Are Performing the Worst?
Austin is the standout underperformer among major metros. It posted a 3.3% year-over-year decline in asking rents entering 2026, the worst reading in the Yardi Matrix top-30 dataset. The market added heavily during the pandemic construction cycle, and demand growth has not kept pace with deliveries. Austin's under-construction supply stood at 3.2% of existing stock as of February 2026, still above the national pace despite some pipeline moderation.
Sarasota-Cape Coral is the most extreme case in percentage terms. Rents fell 6.9% year-over-year, the steepest decline among all tracked markets. The market has 8.7% of existing inventory under active construction as of early 2026, and total supply growth has exceeded 13% of existing inventory over the past three years. Cape Coral implemented a development moratorium from April 2023 through October 2024 requiring mixed-use components and one-mile separation between new facilities, which slowed the pipeline at the margins but did not stop it.
Phoenix is holding at negative 1.7% year-over-year with 6.8% of existing stock under construction. Tampa sits at roughly negative 3% with 6.5% under construction. Las Vegas tracks in the same band with 6.6% under construction. Charlotte, which entered 2026 carrying three years of above-average deliveries, is running approximately negative 1.4% year-over-year.
The common thread is not location. It is the ratio of new supply to demand absorption. Sarasota-Cape Coral leads the nation in construction-to-existing-stock ratio. Phoenix, Las Vegas, and Tampa cluster closely behind. In each case, demand has simply not grown fast enough to absorb what was built.
Which Coastal Markets Are Still Growing Rates?
Boston is the clearest counterpoint in the national dataset. Rates increased 11% year-over-year in February 2026, reaching $219 per month for a standard 10x10 unit. The city carries just 0.7 square feet of storage per capita, no new supply was delivered in 2025, and no significant pipeline is forecast for 2026. The combination of dense urban land constraints, high land costs, and permitting timelines has created a structural undersupply condition that has persisted through the entire national rate correction.
New York metro markets are similarly insulated. New York City and Los Angeles sit at approximately 2.1 square feet per capita versus a national average in the 6.3 to 7.6 square foot range. Yonkers posted a 3.9% year-over-year increase to $199 per month in early 2026 on just 2.1 square feet per capita. San Antonio, Philadelphia, and New York have all seen their under-construction supply decline over the past year, a direct contrast to the Sun Belt markets still running hot pipelines.
Washington D.C., Seattle, and San Jose are flagged by Yardi Matrix as markets positioned for faster rent recovery as 2026 progresses, owing to low new supply and improving housing conditions relative to their Sun Belt peers. These are not big growth stories. They are stories of relative stability holding above a softening national baseline.
"The industry's recovery from its weak fundamentals will be gradual and uneven in 2026, favoring markets with low supply and improving housing conditions."
- Yardi Matrix, Q1 2026 Self-Storage Market Outlook
What Does Per-Capita Supply Actually Tell Operators?
The per-capita supply figure is the most direct predictor of street rate trajectory at the metro level, and it is not subtle. Lubbock, Texas posted the second-largest rent decline nationally at negative 7.4%, pulling rates to $100 per month. The city offers 17.1 square feet of storage per capita, more than double the national average. At that ratio, operators are not competing for a share of natural demand. They are competing for a share of capacity the market does not actually need.
Boston at 0.7 square feet per capita represents the opposite condition. There is no spec development model that pencils out in that market at current land costs, which means the constraint is structural and likely durable. The undersupply will persist not because of regulatory intervention but because economics prevent new supply from entering.
The middle range is where the strategic question gets harder. Phoenix at roughly 8 to 9 square feet per capita sits above the national average but below the extreme outliers. It is oversupplied but not permanently so. Demand can theoretically catch up to supply as population growth continues. The question is timing: how many years of rate compression does an operator absorb while waiting for absorption to normalize?
How Are Operators in Oversupplied Markets Responding?
Move-in rates nationally fell 10.7% year-over-year in Q4 2025, dropping from $108.05 to $96.44 per month. That is not the result of permanent rate cuts. It is the result of front-loaded concessions: free months, heavily discounted promotional periods, and waived fees offered to new tenants to fill units while holding stated rates stable on lease renewals.
The strategic logic behind this approach is straightforward. Front-loaded concessions preserve optionality. When the market recovers, operators can roll new leases at true market rent without having anchored their asking rates at a lower permanent level. Cutting advertised rates directly is harder to reverse because it resets market expectations and complicates the in-place increase conversation with existing tenants.
In markets like Phoenix and Austin, the operational playbook in oversupply is shifting toward occupancy maximization over rate optimization. Maximizing occupancy in an oversupplied market is the first priority; maximizing rent follows only after occupancy stabilizes. Operators competing on amenities, security features, and customer experience rather than price are attempting to differentiate on something other than the discount.
The challenge is that in a market where 6.8% of existing stock is still under construction, as Phoenix currently sits, new facilities are entering the competitive set every quarter. Each new lease-up facility is incentivized to aggressively price for occupancy, which continuously resets the floor for street rates across the market.
Is There a Supply Pipeline Floor Yet?
Yardi Matrix revised its forecast for 2026 completions upward by 6%, and its 2027 estimate by 4.8%, after the pipeline proved stickier than previous models predicted. Total completions for 2026 are now estimated at 51.1 million net rentable square feet, declining to 44 million in 2027 and approximately 38 million in 2028.
The delivery curve is bending downward. But "bending down from a high level" is different from "correcting." In markets like Sarasota-Cape Coral, which is on track to add another 6 million net rentable square feet over the next five years, the supply pressure is not winding down quickly. In markets like Boston and New York, where pipeline activity is minimal or absent, the floor is already the ceiling.
Operators in Sun Belt markets banking on a 2026 demand surge to rescue their street rates face a concrete obstacle: the housing market. Yardi Matrix's analysis identifies a historically weak housing market as the primary demand headwind nationally. Move-driven storage demand, historically the largest single demand trigger, is subdued in the same markets where supply is heaviest. The correlation runs directly against the Sun Belt: these are markets where new housing construction has been strong relative to coastal cities, but existing home turnover is also under pressure from locked-in mortgage rates.
The Numbers Worth Writing Down
- Austin: -3.3% year-over-year asking rents in Q1 2026, worst among Yardi Matrix top-30 metros
- Sarasota-Cape Coral: -6.9% year-over-year, 8.7% of existing stock under active construction
- Phoenix: -1.7% year-over-year, 6.8% under construction as of February 2026
- Tampa: approximately -3% year-over-year, 6.5% under construction
- Boston: +11% year-over-year to $219/month, 0.7 sq ft per capita, no significant 2026 pipeline
- Yonkers, NY: +3.9% year-over-year to $199/month, 2.1 sq ft per capita
- Lubbock, TX: -7.4% year-over-year to $100/month, 17.1 sq ft per capita
- Q4 2025 average move-in rate: $96.44, down 10.7% year-over-year
- 2026 total completions estimate: 51.1 million net rentable square feet (Yardi Matrix, revised upward 6%)
- Charlotte, Tampa, Orlando, Sarasota: all added more than 13% supply growth versus existing inventory over the past three years
The Gap Is the Forecast
The Sun Belt rate story and the coastal rate story are not converging in 2026. The pipeline data in markets like Sarasota-Cape Coral and Phoenix points toward continued pressure, not near-term relief. The structural supply constraints in Boston and New York are not changing because there is no mechanism to change them at scale.
What this means practically: operators acquiring in constrained coastal markets are buying durable pricing power at premium cap rates. Operators in Sun Belt oversupply are managing through a correction whose duration depends on how fast demand closes the gap with a supply overhang built up over three years of aggressive development.
Yardi Matrix's "gradual and uneven" language is the accurate framing. The recovery, when it comes, will be led by the markets with structural undersupply. The Sun Belt markets with the heaviest pipelines will follow, in sequence, as deliveries decline and absorbed occupancy reaches the level that justifies moving street rates back up. How long that sequence takes in Phoenix is a different question than how long it takes in Austin, which is a different question again from how long it takes in Lubbock.
Sources
- U.S. Self-Storage Market Steps Cautiously Into 2026, Yardi Matrix Reports, Yardi Matrix
- February 2026 Self Storage Report: Rents Slip Nationally, RentCafe
- Self Storage National Report: March 2026, Multi-Housing News
- Self-Storage Rents Continue Slide in Early 2026, Scotsman Guide
- Self Storage Supply Outpaces Demand in 2026, CRE Daily
- Self Storage Rent Trends Face Volatility in 2026, CRE Daily
- Self Storage in Phoenix: Will Oversupply Impact Rates?, Radius+
- The Fate of Oversupplied Self-Storage Markets, Inside Self-Storage