On average, listings lease in the $10's per square foot per year. The Dumbarton region is seeing a a boost in rates. In the last 3 months, the median rate went up $18 per sqft per year.
In the last 90 days, 7 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 43% of the listings in the Dumbarton are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 19,310 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this market are close to 1 floors. Most buildings in this region were built in 1989 and are Class A.