A wall is like the cell wall in a plant cell because the both provide support and protection.
The door is like the cell membrane of a plant cell because they both control what enters and exits.
The stuff inside the house is like the cytoplasm in a plant cell because they both are a substance that fills in the place.
The foundation of the house is like the cytoskeleton of a plant cell because they both help support the place and give it shape and structure.
The people that live in the house are like the nucleus of a plant cell because they both control most of what happens.
The interior of the house is just like the vacuole of a plant cell because they both store materials.
The roof of the house is like the nuclear envelope of a plant cell because they both protect the nucleus. And the nucleus was already compared to the people living in the house.
The chimney, although you cannot see it, it is like the mitochondria of a plant cell because they both release energy.