In general, Sunset Park prices have slipped in the last 3 years on a par with most of Brooklyn, which overall has slipped about 10+%. But "in general" may not be meaningful for your particular property.
Is this a condo, by chance? Probably not, but condos are more in demand than co-ops, and so a condo will hold value better.
Have you improved the property in any way--new kitchen? New bathroom? Refinished the floors?
Has the building upgraded in any way? Are the financial statements better, or worse, than 3 years ago? Is this an all-around excellent building, or a building that looks shabby with weak maintenance staff?
There are more buyers in your price range than there are at higher price ranges, so overall stats aren't as meaningful as stats that are stratified (grouped) by prices. A lot of first-time buyers are entering the market to take advantage of low interest rates.
A probable sale price can be estimated with a Comparative Market Analysis and an on-site assessment, which I would be happy to provide, just send me an email message with the address.
Karla Harby, VP
Charles Rutenberg Realty