The typical asking rate per listing is in the $60's per square foot per year. The Cupertino region is going through a a boost in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 3% increase in rent.
Compared to the rest of the Silicon Valley market, the Cupertino region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 11 listings have been posted online, which means spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. About 9% of the listings in the Cupertino are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this market were built in 1984 and are Class B.