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 $5 per sqft per year. That's a 15% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Temecula region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 47 listings have come on the market, so you'll want to check back regularly for new listings. About 60% of the office spaces in the Temecula are subleases, so you might be able to snag a great spot on a short term. 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 1,650 sqft. Most properties in this region are around 2 stories. Most buildings in this market were built in 1993 and are Class B.