Most listings are in the $30's per square foot per year. The Thousand Oaks submarket is experiencing a decline in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 11% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Thousand Oaks region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 42 listings have been listed, so you'll want to check back regularly for new listings. About 5% of the office spaces in the Thousand Oaks are subleases, so you will probably have to consider a longer term lease. 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 1,380 sqft. Most buildings in this area are around 2 floors. Most buildings in this area were built in 1986 and are Class B.