Most listings are in the $30's per square foot per year. The Santa Clarita submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 16% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Santa Clarita region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 62 listings have been listed, so you'll want to check back regularly for new listings. About 127% of the available leases in the Santa Clarita are subleases, so you might be able to sign a shorter term by taking over a previous 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 1,680 sqft. Most properties in this region are approximately 2 floors. Most buildings in this area were built in 2001 and are Class A.