That's a new house. The weird thing is how often old houses don't sell for much more than an empty lot in single-family home neighborhoods. Although I'm not familiar with Seattle. I've lived in various parts of Florida, Denver (long ago), Michigan, Texas, etc. Mostly Sunbelt.
There's not many vacant residential lots within city limits in Seattle, but the ones out there are definitely cheaper than buying a lot with a home, new or old, on it.