The typical asking rate per listing is in the $10's per square foot per year. The Burlington region is going through a a boost in rates. In the last 3 months, the median rate rose $13 per sqft per year.
In the last 90 days, 15 listings have come on the market, which means spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,450 sqft. Most properties in this market are around 2 stories. Most buildings in this region were built in 1975.