The typical asking rate per listing is in the $20's per square foot per year. The Mesa submarket is seeing a an increase 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 submarket.
In the last 90 days, 182 listings have been made available, so you'll want to check back regularly for new listings. About 100% of the listings 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 posted, 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 buildings in this area are close to 1 floors. Most buildings in this region were built in 1988 and are Class B.