Most listings are in the $20's per square foot per year. The Arizona region is going through a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 2093 listings have been posted online, so you'll want to check back regularly for new listings. About 3% of the available leases in the Arizona 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 buildings in this region are close to 2 stories. Most buildings in this region were built in 1992 and are Class B.