Most listings are in the $20's per square foot per year. The Lane County submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 14% decrease in rent.
In the last 90 days, 40 listings have come on the market, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 3% of the available leases in the Lane County are subleases, so you will probably have to focus your search on direct office leases. 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 2,070 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 1980 and are Class B.