This page states no ADU rules, fees, setbacks, sizes, or timelines. ADU rules in Sacramento County have changed recently, including county proposals to defer to State law, and they continue to change. Any page that states a specific rule without a date risks being wrong. Use the official sources below for current requirements for your parcel.
North Highlands is in unincorporated Sacramento County, which means county planning — not a city — is the relevant authority for most parcels there. The two official sources to check are Sacramento County Planning & Environmental Review, which administers the county zoning code and its user guide, and the California Department of Housing and Community Development (HCD), which publishes State ADU law guidance that local rules must follow.
When you check, look for three things: the current zoning code user guide or ADU guidelines for unincorporated Sacramento County, whether any local ordinance is currently in force or has been repealed in favour of State law, and the application route for your parcel type. Do not rely on a builder's summary alone, and do not rely on this page for a rule — it deliberately states none.
Official sources to check
- Sacramento County Planning & Environmental Review — county zoning code, user guide, and application information for unincorporated Sacramento County.
- County of Sacramento — county homepage, from which Planning & Environmental Review can be reached.
- California Department of Housing and Community Development (HCD) — State ADU law guidance. Search the HCD site for its current ADU handbook rather than relying on a summary page.
What to ask the county
- Which rules currently apply to my parcel: a local ordinance, State law, or both?
- What application route applies to a detached ADU versus a garage conversion on my lot?
- What documents are needed before an application can be accepted?
Questions people ask
Why doesn't this page just list the rules?
Because they change, and a stale rule is worse than no rule. The county's own recent proposals have moved between a local ordinance and deference to State law, which is exactly why this page points to official sources instead of stating requirements.
Does this page replace a feasibility check?
No. Official rules tell you what is allowed in general; feasibility tells you what your specific lot can support. You need both.
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