Most listings are in the $10's per square foot per year. The Mesa submarket is seeing a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 10% decrease in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Mesa region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 182 listings have been made available, so you'll want to check back regularly for new listings. About 68% of the listings in the Mesa 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,340 sqft. Most buildings in this area are around 1 stories. Most buildings in this region were built in 1988 and are Class B.