Compared to the rest of the San Diego market, the Escondido region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 43 listings have come on the market, so you'll want to check back regularly for new listings. 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 1,800 sqft. Most buildings in this region are around 2 stories. Most buildings in this area were built in 1986 and are Class A.