On average, listings lease in the $20's per square foot per year. The Poway submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decline in rent.
Compared to the rest of the San Diego market, the Poway region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 25 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 12% of the available leases in the Poway are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 2,820 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are approximately 2 stories. Most buildings in this area were built in 1999 and are Class B.