On average, listings lease in the $20's per square foot per year. The Seaford submarket is experiencing a an increase in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 22% rise in rent.
In the last 90 days, 0 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About Inf% of the available leases in the Seaford 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 980 sqft. Most buildings in this area are around 3 stories. Most buildings in this market were built in 2007 and are Class A.