On average, listings lease in the $30's per square foot per year. The Westminster region is going through a a boost in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 18% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Westminster submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been posted online, which means office spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,350 sqft. Most properties in this region are around 1 floors. Most buildings in this region were built in 1981 and are Class A.
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 region. 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.