Most listings are in the $10's per square foot per year. The Casa Grande region is experiencing a an increase in rates. In the last 3 months, the median rate increased $18 per sqft per year.
Compared to the rest of the Phoenix Metropolitan Area market, the Casa Grande region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 6 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 433% of the available leases in the Casa Grande 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 2,030 sqft. Most properties in this area are close to 1 stories. Most buildings in this area were built in 2003 and are Class B.