The typical asking rate per listing is in the $30's per square foot per year. The Bellflower submarket is going through a a boost in rates. In the last 3 months, the median rate rose $16 per sqft per year. That's a 80% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Bellflower region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 4 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 125% of the office spaces in the Bellflower are subleases, so you might be able to find a shorter term or below market rent. 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 1,260 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1954 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Finance and insurance are the dominant industries in this area. Most of the folk of Bellflower work from home. Commuting more than an hour and a half a day is the norm for those who opt to reside in this part of town.