How much value in partitioning lot?

[James Phillips]

My wife and I are going to sell our primary residence so that we can cash out of all the equity so that we can make RE investments. We're on a half acre and Ive already spoke with the city and my zoning is good for another house. I do not intend to build back there but my question is this: Can I list my house for more if I take care of the partition myself? Or do I just market the property as "dividable" and let the next people do it if they wish?

The idea here is obviously maximize equity and list for as much as possible.

Thanks