My house is a small cape cod 2be 1ba with an attic that is being used as a 3rd bedroom. The highest point in the attic is about 6'4" inside, the same height as the dormers. The dormers are the only reason I can use this as a 3rd bedroom.
I live in NJ where my property tax is 3.4% and I don't want to add a second floor to my house because the value would increase to $300K+. The lack of a proper second storey is keeping my property tax "low" (by NJ standards).
So, my idea is remove the set of dormers as you see below and replace them with 2 sets, one set towards the front and one towards the back to have a total of 4 dormer windows, each with the same dimensions as now (about 7.5' wall-to-wall). I would also like to extend my roof so it covers my front porch.
According to this article, each dormer would cost about $15K. Does this cost of each dormer sound right? Also, how much would it cost to extend my room to cover the front porch? And, does it make sense to do this instead of adding a proper second storey, not minding property taxes?