The typical asking rate per listing is in the $40's per square foot per year. The Belltown region is going through a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% increase in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Belltown region has greater rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 35 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 60% of the available leases in the Belltown 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 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 2,020 sqft. Most buildings in this area are close to 5 floors. Most buildings in this region were built in 1967 and are Class A.
A large portion of this region is residential, but there's plenty of office_space. Arts, entertainment, and restaurants are the dominant industries in this market. Most of the occupants of Belltown work from home. Commuting close to 10 minutes a day is the norm for those who opt to reside in this part of town.