On average, listings lease in the $20's per square foot per year. The Anaheim submarket is experiencing a a rise in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 45% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Anaheim region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 40 listings have come on the market, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 113% of the available leases in the Anaheim are subleases, so you might be able to snag a great spot on a short term. 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 1,970 sqft. Most buildings in this area are close to 2 floors. Most buildings in this area were built in 1982 and are Class B.