The typical asking rate per listing is in the $30's per square foot per year. The Stevenson Ranch submarket is going through a a boost in rates. In the last 3 months, the median rate rose $36 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Stevenson Ranch region has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 3 listings have come on the market, which means new availabilities might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 33% of the available space in the Stevenson Ranch are subleases, so you might be able to find a shorter term or below market rent. 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 1,050 sqft. Most buildings in this area are around 3 stories. Most buildings in this region were built in 2003 and are Class A.