I took this picture a while ago but the blog "Short Articles about Long Meetings" confirmed what was going on with this property near the intersections of NJ, RI and Florida Avenues. It has been vacant since 2011, if not longer. There was a widow of a physician living in the house previously, but now the current owners are seeking to renovate the property into condos, the details you can read at the SAaLM link above.
Tax-wise the property appears to have been vacant since 2009, when the yearly tax jumped from $1,564 in 2008 to $7,008 the following year. It has a class 3, which is the vacant rate, exception. The current owner, Newton St Development LLC bought the property in January 2014. In that same month a postcard permit was issued for internal demolition of non-bearing elements.
Considering that the ANC voted against the zoning variances the developers would need, it doesn't appear that anything is going to happen to this property any time soon, and thus will remain vacant.