I'd like to buy rural land & build a tiny home somewhere in Cali, Oregon, Washington where I'll be allowed to use a composting toilet. I've asked a few cities in Cali but they said I must have either a septic system (built by a licensed company) or connected to the public sewer. Anyone know of locations on the west coast that would allow me use a composting toilet? Eventually I would like to build a septic system but at first a composting toilet will have to do.
I know our county (Humboldt, ca) recently made allowances for composting toilets. They also have an "Alternative Owner Builder" permit that basically waves all structural codes as long as its built by the owner and not grid tied. Neighboring counties like trinity, del norte, and siskyu, as well as modoc, lassen, and to some extent Shasta are even more lax about those things of you're out in the country.
The vast majority of land in California is not in a city, and counties often have far more relaxed regulations than cities. Have you been looking into county regulations as well? I believe Siskiyou and Nevada counties allow composting toilets from memory. I will also say from anecdotal evidence that the state is vast, and while you may be required to install septic to get a building permit, there is virtually zero chance anyone is going to stop you from using composting toilets in practice.