The typical asking rate per listing is in the $40's per square foot per year. The Sun Valley submarket is experiencing a a boost in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 23% increase in rent.
In the last 90 days, 2 listings have been posted online, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 330 sqft. Most properties in this area are around 1 stories. Most buildings in this area were built in 1985 and are Class C.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Professional services is the dominant industry in this area. Most of the folk of Sun Valley work from home. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.