On average, listings lease in the $10's per square foot per year. The Mesa region is experiencing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 7% decrease in rent.
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 discounted region.
In the last 90 days, 179 listings have been made available, so you'll want to check back regularly for new listings. About 1% of the available leases in the Mesa are subleases, so you will probably have to consider a longer term 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 1,600 sqft. Most properties in this region are approximately 1 stories. Most buildings in this area were built in 1990 and are Class B.