We have an all brick colonial in Cheverly, MD (just outside Washington, DC). We want to add a small two-story addition on the back of the house. The footprint of the addition would be about 15' x 8' (length parallel to house x length perpendicular to house), a rectangular strip on the back of the house. The first floor would expand the kitchen (currently 10' x 7) to be 10' x 15', with one window over the sink. The rest of the first floor addition would be a new 5' x 8' powder room with one window. The second floor would have a full bath above the powder room portion (with one window) and a large walk-in closet above the expanded 8' part of the kitchen (no windows). So, about 120 sf per floor (=240 sq total). This would require removing two stories of the brick wall. Decent siding, not brick. Probably would have to pour a foundation. I would demo the current kitchen myself. I'm thinking about having a contractor build the addition and getting all the plumbing, electrical, gas in the right places for the new kitchen and bathrooms. They would sheet rock it and then I would be the general contractor for the new kitchen and bathrooms (might do some easy stuff myself, might not finish out the second story bathroom right away). I have a good idea for costs on the kitchen and bathrooms once the space is built. What might it cost to build this two-story addition so it is ready to have the kitchen and bathrooms put in? Second, if we could not afford it all at once, another idea is to only do the first story part of the addition and in the future add the second story (the full bath and walk-in closet). This would of course mean the second story brick would remain in place while the first floor would be removed. Does it even make sense to do this and try to add a second story to the addition later? It seems like that would be more tricky structurally? Thanks for your help.
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