The typical asking rate per listing is in the $10's per square foot per year. The Escondido submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 5% decrease in rent.
Compared to the rest of the San Diego market, the Escondido region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 17 listings have been made available, which means office spaces are probably going fast. 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 2,080 sqft. Most properties in this area are close to 2 stories. Most buildings in this area were built in 1986 and are Class A.