On average, listings lease in the $10's per square foot per year. The Newtown submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 20% increase in rent.
Compared to the rest of the Fairfield market, the Newtown region has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 4 listings have come on the market, which means leases most likley are 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,320 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1928 and are Class A.