Is there a way to create an item and locate it in 3d space using a specific surface as the reference or anchor point?

For example,  just quickly be able to create a form and it be whatever dimensions but I know I want it's bottom surface to be 3m from the stage floor. Currently I have to do height=3m+(0.5xBoxHeightDimension).
I'm hoping for an option to be able to just select lowest part and set height 3m.

Basically I want to be able to "surface justify" like you can left or right justify text in word, not just centre..
If not a thing can we have it, 7 option dropdown menu:
Justify to:
Centre,
X lowest value surface,
X highest value surface,
Y lowest value surface.
Y Highest value sufrace
Y lowest
Y highest..

Where in, really it's just doing the (in my example) +0.5xheightdimension math for us and applying it to x,y or z postion, depending on which you chose You could go wild and add individual options for x y and z, therefore able to "justy" to a corner. ex, lower x, lower y and lower z at the same time.

I know, in a simple case of a box, it's easy, but really annoying when lots of items of varying dimensions at differing heights.