The typical asking rate per listing is in the $10's per square foot per year. The Essex Junction submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $17 per sqft per year. That's a Inf% increase in rent.
In the last 90 days, 3 listings have been listed, which means new availabilities 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,170 sqft.