The typical asking rate per listing is in the $10's per square foot per year. The Johnston submarket is going through a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 8% decrease in rent.
In the last 90 days, 20 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 15% of the available leases in the Johnston are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,920 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are around 1 stories. Most buildings in this region were built in 2002 and are Class B.