Comment by kyrra

Construction codes are still pay walled.

NEC (electric) is $170: https://www.nfpa.org/product/nfpa-70-national-electrical-cod...

IPC (plumbing) is $130: https://webstore.ansi.org/standards/icc/iccipc2024

And there are many others.

(I will say the YC company https://up.codes/ makes these much more accessible, and deals with local variants to these regulations)