Compared to the rest of the Metropolitan Los Angeles market, the Westminster submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 4 listings have been made available, which means 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,800 sqft. Most buildings in this region are approximately 1 floors. Most buildings in this market were built in 1981 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Information is the dominant industry in this market. Most of the folk of Westminster 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.