Most listings are in the $40's per square foot per year. The Broadway submarket is going through a an increase in rates. In the last 3 months, the median rate went up $4 per sqft per year. That's a 11% increase in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Broadway submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 10 listings have been listed, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,300 sqft. Most buildings in this area are around 3 floors. Most buildings in this market were built in 1917 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Information is the dominant industry in this area. Most of the residents of Broadway work from home. Commuting approximately 10 minutes a day is the norm for those who opt to reside in this part of town.