The typical asking rate per listing is in the $20's per square foot per year. The Maricopa County submarket is going through a a rise in rates. In the last 3 months, the median rate rose $0 per sqft per year. That's a 0% rise in rent.
In the last 90 days, 1691 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available leases 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,260 sqft. Most buildings in this market are around 2 stories. Most buildings in this region were built in 1994 and are Class B.