I have a 2 storey house, with a kitchen addition on the back that is one story (with a flat roof). Ideally I'd love to but a room on top of the kitchen and connect with the rest of the second floor. About 12' X 9'. It is a semi-detached house so I would only need 2 walls and a roof I guess. How much would something like this cost?
Such job will be in the range of $40000 and you should check the foundation to make sure is able to carry more loads and get a permit from the city
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