How does one find specific "fire codes" in Multnomah County, Oregon?

I am doing a major renovation, including plumbing, rewiring, etc etc. Are the various building codes city, county, state, and federal? Where can one find a codified listing of all of the different requirements for renovation?

Answers:
County offices and the planning managers departments will have the specific code requirements. Any major renovations you may be doing might require a building permit. You may want to ask.

Other answers:
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