In future episodes Ray and Debra's address is mentioned as 320 Fowler.
In this and at least one other early episode when the front door is opened the numbers on it are 135.
At 3:22 as Ray exits the house, the camera pans too far left and the back of another set can be seen.
When Marie cries about the ink not washing off her hands, the boom mic is visible in the left corner of the screen.