Most listings are in the $20's per square foot per year. The Temecula submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 13% decrease in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Temecula submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 41 listings have been listed, so you'll want to check back regularly for new listings. About 10% of the available leases in the Temecula 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 1,480 sqft. Most properties in this area are close to 2 stories. Most buildings in this area were built in 1991 and are Class B.