Is It Okay To Expand House Over Porch Slab? - Building & Construction - DIY Chatroom Home Improvement Forum
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Old 10-15-2009, 12:06 AM   #1
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Is it okay to expand house over porch slab?


In our backyard we have a 20' by 15' patio made of a slab of concrete. Would it be possible to enlarge the house by attaching sole plates to this slab and building walls over it?

Or would this be considered unsafe and not to code?

This house is in Long Beach, CA

Thanks
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Old 10-15-2009, 06:09 AM   #2
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The foundation for a patio would not be sufficient for the weight of an addition in many cases. This would need to be verified. You would need a permit, and this process will guide you as to what the building department will need.
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Old 10-15-2009, 06:51 AM   #3
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Yes, contact the Building Dept
Possible since you are in CA you could pour a footer/small foundation around the perimeter
Do you know how thick it is at the edges?



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Old 10-15-2009, 01:39 PM   #4
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Quote:
Originally Posted by Scuba_Dave View Post
Yes, contact the Building Dept
Possible since you are in CA you could pour a footer/small fpundation around the perimeter
Do you know how thick it is at the edges?
Not if they want to enclose it. Most porches do not have the required vapor barrier under the slab.
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