Key takeaways
- The U.S. average advertised asking rate per square foot fell 0.5 percent through August to $16.39 for the combined mix of units and sizes.
- Year-over-year, rates for non-climate-controlled units saw negative growth in 26 of the Top 30 metros and in 28 of the Top 30 across the same metric for climate-controlled units.
- The national under-construction pipeline contracted 10 basis points month-over-month, clocking in at 2.1 percent of total stock, amounting to a total of 43.8 million net rentable square feet under development.
- Phoenix maintained its top spot in terms of under-construction pipeline, followed by Orlando, Fla. and the New York suburbs.
Rates stabilize despite slight decline
As of August, the national average annualized asking rate per square foot contracted 5 basis points month-over-month to $16.39 for the combined mix of units and types.
Out of the Top 30 metros tracked by Yardi Matrix, three recorded positive movement in terms of advertised asking rate month-over-month through August, while 24 saw negative growth. Metro Miami, Phoenix and Portland, Ore. were the only metros with an unchanged figure from the previous month.
Year-over-year, rates for non-climate-controlled units fell 1.5 percent across 26 out of the Top 30 metros. The same metric for climate-controlled units contracted 2.3 percent compared to August 2025, in 28 of the Top 30 metros as well.
Phoenix’s pipeline maintains top spot
August saw 2,392 self storage properties in all stages of development nationwide, out of which 594 were under construction, accounting for 2.1 percent of total stock—marking a 10-basis-point decline since July. The pipeline also included 1,499 planned and 299 prospective projects.
The under-construction pipeline reached 43.8 million net rentable square feet during the same month, down 40 basis points compared to August 2025. Out of the top 30 metro list tracked by Yardi Matrix, four saw positive movement from July through August, in terms of development, namely metro Miami, Charlotte, N.C., Chicago and Portland.
Ten metros on the same list saw negative movement and 16 had unchanged values compared to the previous month.
Phoenix continues to rank at the top of the list in terms of under-construction supply, despite its negative growth month-over-month, from 6.6 percent in July to 6.2 percent in August. Trailing behind Phoenix is Orlando, Fla., whose figure clocked in at 4.6 percent of under-construction supply from total inventory, marking a 50-basis-point drop month-over-month.
While major markets across Texas and Florida continue to occupy the top positions in terms of supply, Midwestern markets rank towards the bottom, namely Salt Lake City, Portland and Minneapolis, Minn.
Read the full Yardi Matrix National Self Storage Market Outlook: September 2026.
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