For example, one contractor run the plumbing lines underneath the floor.

Also, it's incredibly common for houses to have foundation issues due to soil composition and extreme weather.

My long term goal is to complete a limited partnership structure while creating multiple LLC's/ partnerships underneath that entity.

Waterproofing a basement is only a barrier to ground water (if the soil gets saturated) and will not offer any significant protection against surface water (as in flooding) ...

The prior owner had completely undermined the house by digging out underneath the entire home - probably to gain access to shim up sagging floors and replace plumbing.

Because they can own the structure, but not the land underneath of it.

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The staircase at the entry of the house(public right way area) is not in good shape, may cause people to fall. 2. the far end of the back yard has a cliff due to water taking away the soil since the house is on a hillside.

I already have a topographic survey and soil reports.Could anyone please recommend a good contractor, structural engineer and an architect who specialize in properties on a hill and who have reasonable pricing.Thank you,Dina

They are basic gravity fed systems - helps that we have really Sandy soils.