On average, listings lease in the $0's per square foot per year. The Rotterdam region is going through a decline in rates. In the last 3 months, the median rate decreased $16 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 0 listings have been posted online, which means office spaces might be going fast. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the available leases in the Rotterdam are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most properties in this market are around 2 floors.