In the last 90 days, 2 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the available space in the Northside are subleases, so you might be able to find a shorter term or below market rent. 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 sqft. Most buildings in this market are around 1 floors. Most buildings in this area were built in 1954 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Professional services is the dominant industry in this area. Most of the folk of Northside work from home. Commuting close to 10 minutes a day is the norm for those who opt to reside in this part of town.