Slab/Basement

You will have to saw the slab and remvove areas large enough to make trenches where the plumbing pipes are needed. Then the slab will be repaired in these areas.

As for a full basement....buy a different house if you want one. It could be done but the cost would well exceed the property value increase.

Glenn

Many times it is possible for a plumber to tunnel in from outside to provide plumbing through a slab. Then the only cutting of the crete is a hole or three where the pipes come up.

Do slabs crack since they are above the frost line?

Also how deep do they have to be?

Thanx

Slabs crack because they are concrete. that's its job. It gets hard, it cracks. Above the frost line should have nothing to do with cracks.
Concrete starts it cracking process during initial cure. ACI (American Concrete Institute) has recommendations for control joints to minimize cracking, but it is inevitable. Concrete can crack for a lot of reasons. It has all of its strength in compression and is weakest in tension, always fails in shear. Steel reinforcement adds the component of tension to the mix.

Hope This helps,

Keith