On average, listings lease in the $20's per square foot per year. The Mesa submarket is going through a a rise in rates. In the last 3 months, the median rate increased $20 per sqft per year.
Compared to the rest of the Phoenix Metropolitan Area market, the Mesa region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 182 listings have been listed, so you'll want to check back regularly for new listings. About 92% of the office spaces in the Mesa are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,200 sqft. Most properties in this region are close to 1 stories. Most buildings in this region were built in 1988 and are Class B.