Re-subdividing land divsion

[David Contreras]

How difficult is dividing land that used to be separate, but is now a large lot as a result of a voluntary merger by the previous owner ? 

tldr : A 3 acre lot used to be 6 ~ 0.48acre lots but we're merged together to make 1 big one. 

I've already messaged the county planning division, but wanted to get an idea of what I'm getting into. What is the process like/what's needed ? 

Appreciate any insight