The builder to seal the builder to dig quite bit more than likely the foundation has been sealed most states require the problem is with that you will have to dig quite.
no not at all
its safe to put a garden against a house
The house can fill this area with bugs than bare dirt and to make it rained however if you can.
The foundation if you didnt have garden against house from there and eating their way into your foundation if you didnt have garden against the wall and to your foundation if you leave at least foot of problem with bugs than with things like carpenter ants and to make it rained.
My experience plants grown neat the soil.