That kind of space costs money and doesn't generate income.This is why developers maximize the income space and minimize the dead space.The topography and soil composition plays a huge part as well.If you have to blast out rock,deal with underground springs,endangered species protestors from lake sand streams,or have hilly topo that is real expensive to get in a buildable state that can kill your profit margin.In Georgia new multifamily builds in the suburbs for class A is about 17 to 25 acres of land and about 250 to 350 units in size.Urban locations are built with more density because of available land space.So you have to determine your land and the surrounding lands highest and best use.Once you know that you can develop a pro-forma in costs and work your way backwards to get a price a developer in that asset class would be for ground up acquisition on that piece of dirt.

Is the soil fit for gardening?

Just to get it to the point of submitting for approvals requires purchasing the land, and having large sums of money be paid out for engineering, environmental reports, soils testing, etc., without any guarantee it will be approved.

The water level in the pipes will equal the water level outside the walls in the soil.

Second, you have created an obstruction on the roof that forces a harder flow of water around it, so you want to make sure the surrounding roof has some added precaution, especially if your roof is a low-slope (say 4:12 pitch or so)If I were putting in a skylight, with no roof on the house, I would have the rubberized ice-dam sheeting product on the roof immediately surrounding the skylights so that the heavier flow of water around the skylight has no opportunity of getting underneath and leaking through anywhere.

Did she remove the tub to see what was underneath?

In Dallas, and Austin, there is soil moisture change that often cracks foundations.

We used a company called BioSweep and it solved the issue.https://biosweepnva.com/Next time we will trash out property, remove soiled carpet and flooring, clean, and then treat the house smell(Bio sweep) prior to painting and doing any Kilz.

It was a waste of $10K, because the sinking was probably just caused by the clay soil being dry those years.

This would include soil tests to check bearing capacity of the soils so that the engineer can size the footings correctly.