The brick ranch portion of Charlotte Park is safe for now. The majority of the homes are well maintained and have decent square footage. Houses that need a little work/updating are selling for over 200k. Exit prices in the Nations are a good bit higher and the most developers are willing to pay for a building lot is about 80k per pad. I doubt we will ever see many brick ranch tear downs, the numbers just don't work. Also I highly doubt anyone in this area would be interested in down zoning their property for any reason, its a little bit of a different setting than Belmont-Hillsboro.
The other portion of the neighborhood between the park and Briley is a different story. This was one of the worse areas of West Nashville, a good amount of the homes are nondescript and in bad shape. The lots are zoned R8 and several of them are large enough to build four homes on, two front and two back. I know of about 15 homes that are currently slated for demolition and I suspect 40-50% of the area will be razed in the next couple years. There is also a handful of renovations in the area. I'm rehabbing a house in the area that was built in 1996, my list price will be 60 or 70k lower than it would be if it were in the Nations.