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Question DetailsAsked on 10/21/2013

How much does it cost to add a second story to a home?

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2 Answers


Short answer: About as much to build a one story home.

Better answer: You may have to make some structural changes and additions to what you are starting with to support the second story. May even have to do some foundation work also. I'd say fist step would be to get an architect/engineer to check it out and draw up the blue prints. You would probably have to do this inorder for the Contractor to get a permit anyway. If I were your contractor, and depending on how large of a second story, I'd draw up what you want to do, how I think it would have to be done, and get approvial to do it that way so there would not be any problems or questions come inspection time.

Answered 5 years ago by TLD


TLD is right - you would need an architect to help design the layout and architectural details, prepare plans and specs, help with getting permits, choosing general contractor, inspection during construction, etc.

Extremely rough numbers, just to give you a ballpark so you know if it is even something you want to consider it or not - almost certainly about $120/SF or more for rough-in through drywall only, on up to around $150-180/SF for normal finishes in normal building cost area, over $200 to as much as $400/SF in very high-cost urban areas or high-end design.

A lot depends on your existing foundations and first floor construction - as much as $30-50,000 of the cost - if they can handle the added story with little or no modifications (which is commonly the case) then that makes raising a second story economical. If they need major beefing up, is usually easier and just as cheap or cheaper to add with a new 2-story addition rather than adding a second story.

If you are still in the ballpark, I would select an architect with remodel and add-on experience, and have him/her do an initial rough estimate for what you are talking about - should not cost more than about $1000-1500, I believe - this would be rough concept and rough construction cost estimate, NOT an actual design, which could come next if you decide to go ahead.

Answered 5 years ago by LCD

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