Blue Spruce and Eastern White Cedar Near Foundation

The following was received via email:

I started a new business landscaping last year and it is out of control. I have more work than I can keep up with...but I guess that is a good thing. I also work in the OR on the heart team (21 years), so it is really therapy for me. My question has to do with removing trees next to a cinder block foundation. Do these trees have deep root systems? I would say yes for the cedar and no for the blue spruce...what would you say? Should I just cut them off at the ground level and leave the roots to rot? If I pull them out will the foundation come with it? Thanks for your time. Come to Vermont sometime. It is almost as beautiful as BC. Cheers,
Charlie