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Due diligence

Mountain Land Tiny Home Warnings

A plain-English California guide for checking zoning, utilities, permits, building-code issues, and the official questions to ask before money is spent.

The short answer

In California, the right answer usually depends on the parcel, the jurisdiction, the proposed use, utilities, and the structure category. A broad rule can be useful, but it should never replace a parcel-specific planning and building check.

What to verify first

Identify the APN, city or unincorporated county jurisdiction, zoning district, overlays, existing structures, sewer or septic path, water source, power availability, fire access, and whether the proposal is an ADU, dwelling, manufactured home, modular home, RV, or movable tiny home.

  • Call planning before buying land or ordering plans.
  • Ask building how the structure type will be reviewed.
  • Confirm utility providers and connection feasibility.
  • Check environmental health for septic and well issues.
  • Save links, names, dates, and code references.

Educational estimate only. Tiny home, ADU, zoning, utility, septic, and building-code rules vary by parcel, city, county, zoning district, overlays, and utility provider. Always confirm with the local planning department, building department, environmental health department, fire authority, and utility provider before buying land, designing, permitting, or building.