Most listings are in the $10's per square foot per year. The Longmont submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 20% decrease in rent.
In the last 90 days, 22 listings have been listed, which means office spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. About 5% of the available space in the Longmont are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,700 sqft. Most properties in this region are close to 2 floors. Most buildings in this market were built in 1987 and are Class A.