On average, listings lease in the $20's per square foot per year. The Yorba Linda submarket is going through a an increase in rates. In the last 3 months, the median rate increased $29 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Yorba Linda submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 0 listings have been listed, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About NaN% of the office spaces in the Yorba Linda are subleases, so you will probably have to consider a longer term lease. 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 980 sqft. Most properties in this area are close to 2 stories. Most buildings in this region were built in 1986 and are Class B.