On average, listings lease in the $20's per square foot per year. The Glendale submarket is going through a a boost in rates. In the last 3 months, the median rate rose $24 per sqft per year.
Compared to the rest of the Phoenix Metropolitan Area market, the Glendale region has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 29 listings have been listed, which means spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 79% of the available leases in the Glendale are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,320 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 2000 and are Class B.