Plats
In Henderson, You Plat the Land Before You Split It or Build on It
A plat is just a formal survey that pins down a lot's exact dimensions, but inside Henderson it's the gate everything else passes through. The city won't issue a building permit until there's an approved plat on file, and you can't subdivide a parcel and legally sell off the pieces without one. Once approved, the plat is recorded in the Rusk County plat records, where it becomes the official picture of the lot.
This trips up buyers of raw or unplatted land more than anyone. You find a few acres on the edge of town, picture splitting it into two homesites, and then learn the split can't be sold until the plat clears the city, which can take months and may turn up requirements for street frontage, utilities, or drainage you hadn't budgeted for.
The city's own advice is to start before you're committed: a preliminary conference with the Community Development Department, at 903-392-0786, so staff can tell you which process your particular piece of ground actually needs. That conversation costs a lot less while you can still walk away than it does once you've promised someone half the lot.
Source to confirm: City of Henderson - Plats