Ok so here is my attempt. You really have 2 choices here either blend that porch roof
in with the main roof or as the picture really shows is to keep the porch roof separate all together like my attempt. You can play with the hieghts of the plates, like the pictures shows. IMO there are 3 plate heights here 8', 9' and something taller for the porch.
If we are going with the porch all separate then a roof cricket to drain behind that this roof has to be utilized. Although if you're in snow areas I wouldn't attempt this without some type of ice and water shield.

First Try.skp

Giving again

02 Garage Door.skp

05 GarageDoor.skp

Seeing I've been taking instead of giving here are a few doors I created.
Wayne Dalton 9700 series

01 Garage Door.skp

03 Garage Door.skp

04 Garage Door.skp