Most listings are in the $30's per square foot per year. The Bristol submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $34 per sqft per year.
In the last 90 days, 4 listings have been listed, which means new listings are probably going fast. You'll want to be prepared to make an offer immediately. About 75% of the listings in the Bristol 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 750 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1950.