try 150 yrs old if not 175
True story: My house is not quite 100 years old. Maybe 15 years ago, I was back visiting my family where I grew up (in Philadelphia). Many of my old neighbors had since moved out to the suburbs, most of them into McMansions. We got together and, as 30-somethings, our conversation turned to houses. Now, I was confident that I had the oldest house in the group, and mine is rock-solid, so I was biding my time. One by one, the people complained about poor construction, or about their furnaces or water heaters hitting 15 yrs old and needing replacing, or the like. The little sister of my best friend growing up said, oh, she didn't really know about those problems, because her house was pretty old.
"Yeah, my house is pretty old, too," I said (with the thought balloon above my head waiting to pronounce my house was about 85 years old at that time). "How old is your house?"
"Oh," she said, "I am not really sure." The oldest part is about 250 years old, but most of it is less than 200."
Ulp, I forgot I was back east!