I just completed the 12x16 frame which is described in the sobon timber frame book and I am already looking forward to expanding on this building. I would like to add a wider section to the end of the bldg. I am thinking say 4 or 6 feet wider at each side and say 8 feet or 10 on the length.This means the front end would be 20 or 24 ft wide and 8 or 10ft in length. This sits in front of the 12 ft wide by 16 ft. length section I just finished.

The shed has a 12in overhang at the gable on the existing roof which has a 1 to 1 pitch. . I was thinking I would go 2 ft higher on the posts and keep the same roof pitch in the addition.Is this addition doable or is there a better way to add a wider section. I am a newbie with zero design skill. Thanks for any advice. Please help me with a solution as I love this stuff.
Bob