The typical asking rate per listing is in the $20's per square foot per year. The Belmont region is going through a a boost in rates. In the last 3 months, the median rate rose $22 per sqft per year.
Compared to the rest of the Metrolina market, the Belmont submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 3 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 133% of the office spaces in the Belmont are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 910 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1990 and are Class A.