The typical asking rate per listing is in the $20's per square foot per year. The Maricopa County region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decrease in rent.
In the last 90 days, 1754 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the office spaces in the Maricopa County are subleases, so you will probably have to focus your search on direct office leases. 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 1,970 sqft. Most properties in this region are close to 2 floors. Most buildings in this region were built in 1992 and are Class B.