The typical asking rate per listing is in the $20's per square foot per year. The Belmont submarket is going through a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 6% rise in rent.
Compared to the rest of the Metrolina market, the Belmont region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 3 listings have been posted online, which means new listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 67% of the available leases in the Belmont 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 250 sqft. Most properties in this region are close to 1 floors. Most buildings in this area were built in 1990 and are Class A.