On average, listings lease in the $30's per square foot per year. The West Hartford submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $33 per sqft per year.
In the last 90 days, 10 listings have come on the market, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 90% of the available leases in the West Hartford 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 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 1,360 sqft. Most properties in this area are approximately 2 stories. Most buildings in this area were built in 1956 and are Class B.