Happy Monday, everyone! We hope you can still fit in crawlspaces after all of the Thanksgiving feasts!
Here’s a quick reference on crawlspace regulations. Have a great December in the field, and may you always fit into the “tight” squeezes.

The inspector is not required to: • Enter (a) Subfloor crawlspaces that require excavation or have an access opening less than eighteen inches by twenty-four inches or headroom less than eighteen inches beneath floor joists and twelve inches beneath girders (beams)


Access Openings 15 IRC

 Min 18-in.-high × 24 in. wide opening EXC_ _______________________ 408.4

  • 16 in. high OK in perimeter wall F24 ____________________________ 408.4

 Openings below grade req min 16×24 in. areaway F24 _____________ 408.4

 Through-wall openings not OK below a door_______________________ 408.4

 Opening large enough to remove underfloor mechanical equipment _ __ 408.4


Categories: SOP

JJ Greive

JJ & Suzanne are both licensed, highly skilled inspectors and educators. We are the authors of our class curriculum, and truly enjoy sharing this with our students