Most listings are in the $0's per square foot per year. The Coburg submarket is going through a decline in rates. In the last 3 months, the median rate fell $19 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 0 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About NaN% of the available space in the Coburg 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most buildings in this region were built in 1890 and are Class B.