On average, listings lease in the $10's per square foot per year. The North Valley submarket is going through a a boost in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 4 listings have been made available, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 75% of the available leases in the North Valley 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 6,150 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this market are approximately 1 floors. Most buildings in this market were built in 0 and are Class Class B.