Compared to the rest of the Phoenix Metropolitan Area market, the Mesa region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 167 listings have come on the market, so you'll want to check back regularly for new listings. About 1% of the listings in the Mesa are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,590 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 1990 and are Class B.