The typical asking rate per listing is in the $40's per square foot per year. The Washington County region is experiencing a an increase in rates. In the last 3 months, the median rate increased $48 per sqft per year.
In the last 90 days, 7 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 57% of the listings in the Washington County are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 300 sqft. Most properties in this area are close to 2 floors. Most buildings in this market were built in 1963 and are Class B.