The typical asking rate per listing is in the $20's per square foot per year. The Lancaster region is going through a a boost in rates. In the last 3 months, the median rate went up $6 per sqft per year. That's a 36% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Lancaster submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 29 listings have been made available, 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,670 sqft. Most buildings in this area are close to 1 floors. Most buildings in this area were built in 1988 and are Class A.