No, because of how terrain is modeled. The ground is a Surface - as in 3D modelling - with a 2D heightmap specifying the elevation of each point of a 1m x 1m "block" of land. Because of this, every level of land will always have a 1m wide "slope" around/next to it - the grade created by one side of the block being at one elevation and the other side being at another, with the two sides being 1m apart from each other on a map view.

The best you can do is make your constructions such that they "fill" that border slope. Building with stone can do it easily, since stone building parts are all 1m thick and the borders are all 1m wide. Basically, the stone clips through and makes it look like it was dug flush.