Is Stephenie Meyer's House the same one in twilight?

What do you mean?

Stephanie Meyers lives in Arizona, and owns a house in Marrowstone Island, Washington.

Bella Swan's house was just a set and it was taken down shortly after filming Twilight.

The Cullen house is the Hoke house in real life (purchased by Nike director John Hoke and family) and is located in OR...not in Forks. The Hoke House recently went up for sale for an estimated $3.3 million dollars.