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Question DetailsAsked on 9/18/2014

How much does it cost to add a room addition?

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You can find several prior questions with answers to that question right below this answer - others in the Remodeling link right under your question, and in the Home > Project Cost link in Browse Projects, at lower left. Depends an awful lot on type and depth of foundation (from slab-on-grade to full basement), labor cost in your area, how fancy you go with finishes and roofing, etc. Can go for as low as around $70/SF for very economy finish in parts of the deep south to $400/SF with high-end finishes in northeast cities and ritzy areas - nationwide average project cost is about $150-200/SF for normal nized and grade substantial (say at least 200-250+ SF) additions.


Bear in mind that in MOST areas, the per SF cost for a second story added on a first story addition (new construction, NOT adding on to existing house) is somewhat lower, and about the cheapest additional square footage you can get is basement space, so commonly a full basement under or basement with two-story addition gets you more for your money than a sprawling single-story addition, subject of course to suitability based on available land space and building restrictions.


Of course, if getting older or building an in-law apartment, then a single story addition can be much more functional for older persons than basement or second story.

Answered 5 years ago by LCD




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