Most listings are in the $20's per square foot per year. The Tempe submarket is seeing a decline in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 13% decline in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Tempe region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 69 listings have been made available, so you'll want to check back regularly for new listings. About 13% of the available space in the Tempe 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this market were built in 1987 and are Class B.