The typical asking rate per listing is in the $20's per square foot per year. The Capitol Hill region is experiencing a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 4 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 25% of the available leases in the Capitol Hill 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.
Even though the median size is 7,730 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are close to 6 stories. Most buildings in this area were built in 1939 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Waste services is the dominant industry in this area. Most of the folk of Capitol Hill work from home. Commuting close to 10 minutes a day is the norm for those who opt to reside in this part of town.