On average, listings lease in the $10's per square foot per year. The Martinez region is going through a a rise in rates. In the last 3 months, the median rate increased $16 per sqft per year.
In the last 90 days, 30 listings have been made available, which means new availabilities might be going fast. You'll want to be prepared to make an offer immediately. About 20% of the available leases in the Martinez are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,510 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are around 2 floors. Most buildings in this area were built in 1999 and are Class B.