Hi, we added a new "great room" addition with back covered patio & front porch. Our contractor was a good "listener"...very important! I actually drew a picture of what I wanted & his carpenters did well in duplicating it. We're not DYI builders, but we did do a lot of the interior work ourselves. Saved some cost there. Are you doing a large addition...1 or 2 story? Ours was a one story area added to the side of our 2 story home....about 484 sq. ft. great room with a 14 ft. vaulted ceiling...& back covered patio is a 12x22. There's so much to do on just preparing the land for an addition...and connecting the new with the old part of the house. We dropped the additions roof line a bit. I believe we have a "hip" roof line. (not sure about the term, ha!) Too technical for us, ha! We love this new room...we used a wall of french doors on both the front & back...really is nice to sit in there... worth the cost! Living in Louisiana...it gets so hot in the summer, that it's nice to sit inside this air-conditioned room...feels like the outside is in w/o the heat,ha! Well, good luck with your addition.