The typical asking rate per listing is in the $20's per square foot per year. The National City region is seeing a an increase in rates. In the last 3 months, the median rate increased $8 per sqft per year. That's a 50% rise in rent.
Compared to the rest of the San Diego market, the National City region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 3 listings have been made available, which means spaces might be going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 12,470 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1974 and are Class B.