It was recently reported that Jimmy Fallon and his wife are selling their New York City Penthouse in Gramercy Park. It's listed for $15 million. In looking at the photos, it's pretty much what I would have expected. It's fun and quirky. And they have a "saloon room" that looks like it could be in Wyoming. But what I also find interesting is how they assembled this apartment over time.

It started in 2002. Jimmy Fallon was single and he bought his first place in the building -- a one bedroom for $850,000. According to the article, he couldn't really afford it. But as he was nearing the end of his run on SNL, Lorne Michael encouraged him to buy his own place. So he went and did that in Gramercy Park in a building that dates back to the 1800s.

As life evolved and as Jimmy got married, he and his wife started buying contiguous apartments -- three more to be exact. Their penthouse apartment is now about 5,000 square feet and spans three floors in the building. It's an interesting case study in the flexibility of multi-family buildings. Here is a building that was built in the 1800s and has probably seen a myriad of changes over its lifetime.

Future flexibility is something that is talked about here in Toronto in the context of new construction. We talk about "knock-out panels" so that someone like Jimmy can grow into a larger suite. I'm not sure how often this actually happens, but I would imagine the frequency is relatively low. But it's very possible and not just in older buildings like The Gramercy Park.