Most listings are in the $20's per square foot per year. The Maricopa County submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 6% decrease in rent.
In the last 90 days, 1621 listings have come on the market, so you'll want to check back regularly for new listings. About 3% of the available space 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 1,890 sqft. Most properties in this market are around 2 floors. Most buildings in this market were built in 1990 and are Class B.