The typical asking rate per listing is in the $20's per square foot per year. The Larkfield-Wikiup region is going through a a boost in rates. In the last 3 months, the median rate went up $26 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Bay Area market, the Larkfield-Wikiup region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 8 listings have come on the market, which means spaces are probably going fast. You'll want to be prepared to make an offer immediately. 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 1,690 sqft. Most properties in this market are approximately 2 stories. Most buildings in this market were built in 2007 and are Class B.