Most listings are in the $10's per square foot per year. The Redmond submarket is going through a a rise in rates. In the last 3 months, the median rate went up $5 per sqft per year. That's a 32% rise in rent.
In the last 90 days, 21 listings have been posted online, which means spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 10% of the office spaces in the Redmond 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 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 1,690 sqft. Most properties in this market are around 2 stories. Most buildings in this region were built in 2004 and are Class A.