There were some cool lofts built with zero lot lines, but they are all sold. Definitely Georgetown will be the next "IT" place. It's Belltown 10 years ago.
Unfortunately, I haven't seen any lofts come up in the Georgetown area, and just a handful over the years in the Sodo area... If your heart is not set on those two neighborhoods, you can find several unique loft properties in Pioneer Square, near the Pike Place Market, and in Belltown.
Best of luck to you in your search!
There is new construction that can be converted to look old, but I suspect that that is not what you are looking for. Any other questions, feel free to ask.
Georgetown, on the other hand, is one of my favorite neighborhoods in Seattle - I love all of the house there and all the different local hangouts -
Sorry to tell you, a quick sweep of the MLS doesn't show any lofts or even 1 bedrooms in the Georgetown Sodo area. Are there any other neighborhoods that might work for you?