hall - bedroom 3 to front from back door (downstairs)
The door from the garage (with pet door) is on the right side of the left corridor, just after the door to a handy closet under the stairs.
Bedrooms 2 (at front left) and 3 (end of corridor) are also off the left corridor.
The front door is at the bottom of the steps at the end of the right corridor.
The back door is behind camera left and the downstairs bathroom is behind camera right. Edit