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does the crawl space consider impervious surface for city code?

169 79 July 3, 2025 at 11:03 AM
I plan to build a large backyard patio over concrete slab, my city said that I can't have more than 40% of impervious surface including my house with hardwood floor above the crawl space (filled with dirt), but google says the crawl space is pervious, so who is correct here? thanks
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yeuem4eva
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Joined Dec 2005
My # is bigger than yours
> bubble2 37,379 Posts
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SnakePlisken
07-03-2025 at 11:09 AM.
07-03-2025 at 11:09 AM.
Quote from yeuem4eva :
I plan to build a large backyard patio over concrete slab, my city said that I can't have more than 40% of impervious surface including my house with hardwood floor above the crawl space (filled with dirt), but google says the crawl space is pervious, so who is correct here? thanks
Just call it an overhang. That's what everybody in my trailer park does,
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Joined Aug 2005
Baldilocks
> bubble2 41,172 Posts
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emelvee
07-03-2025 at 11:40 AM.
07-03-2025 at 11:40 AM.
I would definitely trust Google over any city regulations. look around

Though my Google says that the crawlspace area IS considered impervious, since water typically can't "easily" penetrate.

I only posted a helpful response so I could use the word "penetrate"
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Joined Jun 2005
Let Sleeping Dogs Lie
> bubble2 8,770 Posts
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komondor
07-03-2025 at 11:42 AM.
07-03-2025 at 11:42 AM.
How would they know
just say you are going to just paint the concrete once the permit is signed off get hardwood.
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