Place Components
8.Open Components from SketchUp menu:
8(b). Component Window (Note: the components shown in your component window may vary from this image depending on what default and optional components you have installed on your system. For this example only SketchUp components that came with the free version were used):
8(c). Add Door and Window components to model by Drag and Drop method:
Finished View of Drag and Drop Front Components (Door and Windows). You can place these Doors and Windows on any wall surface of the house.
9. Draw rectangle with Rectangle Tool 
for porch overhang:
10. Use Push/Pull Tool 
to pull out overhang:
NOTE: The Push/Pull Tool can be used to match the length of any extended surface by pulling the tool over to the front plane of the surface to be matched such as the overhang to the porch front on this example.
11. Rotate the view and use the Circle Tool 
to draw a circle:
11(b). Use the Push/Pull Tool to pull the circle downward:
11(c).Pull it all the way down to the top of the porch:
11(d). Do the same for the opposite porch support:
Create Simple Model - SketchUp