On average, listings lease in the $40's per square foot per year. The Avondale region is seeing a a boost in rates. In the last 3 months, the median rate rose $44 per sqft per year.
Compared to the rest of the Phoenix Metropolitan Area market, the Avondale submarket has more expensive rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 3 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 100% of the listings in the Avondale are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,360 sqft. Most properties in this area are close to 1 stories. Most buildings in this area were built in 2005 and are Class B.