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The basement is the level in your house below ground level. To say it another way, you would be below the ground if you were in a basement.
I assume your question is "How to level the ground for the installation of swimming pools" The answer is for a yard size pool you may have to rent a small grader such as a "bobcat" combination front end loader with a blade and grading attachment. These are widely available in North America and the Caribbean.
The main level of a house is the ground floor. It is where most people spend their time.
It can mean the height from the ground to the roof peak, or the ground elevation above or below sea level.
A basement of a house is the room or space that is below ground level. A basement appliance that can heat your house is a furnace.
A cellar (or basement) is below the ground level of a house or building.
a roofed platform along the outside of a house, level with the ground floor
What the house rests on is the foundation. It's the lowest level of the house. It's the lowest part that's in contact with the ground, to hold the house in place.
what is the difference in between original ground level and natural ground level
Level Field Fund-Swimming was created on 2010-08-16.
Ozone is a greenhouse gas at lower altitudes. It absorbs heat at the ground level.
When it rains enough you have to sit on the roof of your house because tghe ground water is up to the eaves.