Kennel building plans: What kind of flooring and things to consider?

i can only think of two appropriate flooring options for you, tile or concrete. it has to be washable for obvious reasons. you may want to consider air conditioning or central air if your going to be housing these animals in there year round.

I cannot answer what would be the absolute best, as I have never built a kennel before--though what you are describing sounds ideal. I can say that my dream kennel would look, on the outside, as a large, old-fashioned wooden barn (as I absolutely love those) that is fairly modern on the inside. Indoor kennel "stalls" made of wood, access to the outdoor "yard" by doors w/ dog doors in them (that can be locked) fencing on the outdoor "yard" that can be sectioned off or put together as required. A grooming area, yes, and plenty of storage space :) Though my 'kennel' wouldn't be for breeding purposes; I don't think I am ambitious enough to undertake breeding. I would prefer to have it as an area for rescue.

for the floor you would be best off going for concrete with slab heating, preferably with some guttering so it can be cleaned with a gurney. depending where you live your will probably only need ceiling fans for cooling. outdoor runs will still need some shelter, and you would not be expected to have customers dogs in your own house or office.