Most listings are in the $20's per square foot per year. The Del Rey Oaks region is experiencing a a rise in rates. In the last 3 months, the median rate rose $25 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 1 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 900 sqft. Most buildings in this region were built in 1986 and are Class B.