The typical asking rate per listing is in the $20's per square foot per year. The Maricopa County submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 3% decline in rent.
In the last 90 days, 1801 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the listings in the Maricopa County are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 2,000 sqft. Most properties in this region are approximately 2 stories. Most buildings in this market were built in 1993 and are Class B.