Now that I have made the Paintover it is way more easy to see 'where' and 'what' detail I want to put into the Garage. This means that I have a sense of where this building is going before I start modeling and waste time on figuring that out on the go.
The model is still pretty rough as you can probably see, but this will make more sense once I start uv-ing the hell out of this thing. You can always put more detail into the geometry once it is textured and UV unwraped.
I've made a little time-laps video of how I did it.
Thats all, but stay tuned because I've already UV unwraped the model so im currently working on the textures!