We own a typical 1970's four level split. Most of the roof pitches are 4:12, with a large section being 3:12. We have some minor ice damming problems on the 3:12 section (home inspector). The entire roof needs to be replaced in the next couple years, it currently has two layers of shingles, both of which will need to be removed. There are three major sections of the house, each about 22' x 22'. We are riding the "remodel or move" teeter totter. We are considering an addition which would make the most sense to do at the same time as the roofing. I don't care for shallow pitched roofs. 4:12 would be fine on a shed dormer in my eyes, but I'm afraid to do this major remodel just to notice the roofline every time I look at the house. So, for mostly aesthetic reasons, how much more of a job is it to have the rafters raised to make for maybe a 10:12 roof? This would be hired out, I have no interest in working on the roof. It would be nice to put some useable living space under one section and if it's not too awful it could change the direction of the remodeling plans. I had thought to put a new master suite (main purpose of additon) over the garage by raising the roof, but as is the most that roof could be raised without looking out of place is 4'. That puts us at 8' max. ceiling height, too close for comfort. Not raising the roof forces increasing the footprint by about 300 sq.ft. A combo (raising the roof, increasing footprint by about 180 sq. ft.) would look sweet. I realize nobody can give me a good estimate without actually checking out the house, but I'm looking for a "it will double the cost of the re-roofing" or "it will multiple the cost of the re-roofing by 20, you're out of your mind lady!" type estimate before I waste any more brain cycles on the possibilities or bug perspective builders with a thousand irrelevant questions. AFAIK, the roof is structurally sound. Thank you in advance! P.S. Two of the sections are simple gables, the other section has one side that is split 4:12 and 3:12 for a bump out, otherwise a simple gable.