Just acquired this house with challenging problems. When the house was built, the builder didn't care for grading the lot appropriately. One of the rooms in the back of the house is below grade and it floods when it rains. The previous owner installed a sump pump in the backyard (green drum close to 2nd stake) to drain but it is clogged up with dirt. The concrete patio is also incorrectly installed covering the stucco siding in part of the house. The circled location points to where there is 6" level difference between rooms. I am thinking of re-grading the backyard part of the lot to divert water away from the property and digging a trench on one side of the house and run solid pipe french drain in it. Secondly, how to slope the (12'x41') patio from one end to the other while addressing the drop in floor level of 6" inside the house?
Seeking expert advice on the best way to handle the rear of the lot grading and sloping of the slab.
Note: The first stake point on the side image with round pavers is 18" higher than the street, the second 19" but both are higher than the floor of the room the right side.