Most listings are in the $40's per square foot per year. The Avondale region is experiencing a a rise in rates. In the last 3 months, the median rate rose $23 per sqft per year. That's a 109% increase in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Avondale region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 3 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,200 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 2005 and are Class B.