Before you get too far down the road, contact the settlement agency and get copies of covenants, restrictions and recorded plats regarding this property. Have the settlement company give copies of the recorded easements and rights-of-way to a surveyor to draw them in on a survey. The last thing you want to find is that there is a pipeline based on a valid easement agreement going right through the middle of the lot (I'm not making this up, I've seen it).
All of these things are matters of public record and you are charged with having knowledge of what is on every scrap of paper in the courthouse, even though you have never set foot in the courthouse. The last thing you want is a neighbor, HOA, refiner or utility company telling you to take down what you've spent time and money building because they had prior rights superior to yours.
And did you get or are you getting a boundary survey?