How to make pyramid roof?

I have been working on a house project but i'm having trouble creating the roof. Please help!!

You need to model it, as Statement said...

But a quick work around, is do a bump map, and just have it be very drastic, it'd look bad probably, but could work... And you need to define a Pyramid Roof...

If you want it to look nice, you'll need to use a modeler, but if you dont care, just make 2 or 3 cubes and make them into a long, flat rectangle, and place them where you want. You could also use planes instead, but they wouldn't have any depth.

You should be using modelling software such as 3D Max. Unity isn't a modelling package so I'd advise to stay away from that approach. Perhaps the forums would provide a better insight into modelling in other applications.