The typical asking rate per listing is in the $10's per square foot per year. The Ukiah submarket is going through a a rise in rates. In the last 3 months, the median rate increased $17 per sqft per year.
In the last 90 days, 1 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 500% of the available leases in the Ukiah are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 690 sqft. Most buildings in this area are around 1 stories. Most buildings in this area were built in 1993.