Also ground floor is almost never at ground level because that woulkd be a terrible building design prone to flooding and dampness. You almost always go up a few steps to reach the ground/first floor and under the ground/first floor is a crawl space (or basement).
You never want the bottom of your front door level with the ground, water could flow straight in. In my house I have about 4 regular steps at the front and 7 at the back to reach my first floor. the ground level is an unlivable crawl space. Same with my parent's house in scotland, about 3 steps at the front of the house and 5 at the back, the actual ground level is a sandy tar pit covered in nails, spiders and monsters.
You never want the bottom of your front door level with the ground, water could flow straight in. In my house I have about 4 regular steps at the front and 7 at the back to reach my first floor. the ground level is an unlivable crawl space. Same with my parent's house in scotland, about 3 steps at the front of the house and 5 at the back, the actual ground level is a sandy tar pit covered in nails, spiders and monsters.