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Ridgecrest, CA Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

ADU rules in Ridgecrest, CA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Detached ADU max: 1,200 sq ft
Attached ADU max: 50% of primary unit
ADU height cap: 16 feet
Min setback: 4 feet
Note: state law overrides conflicts

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in California under recent ADU streamlining laws. The Ridgecrest, CA rules below cover local size, height, and setback requirements.

Summary

Ridgecrest allows ADUs ministerially in any single-family or multi-family zone under local size, height, and setback standards, but state ADU law overrides the city's rules wherever they conflict.

(a)Purpose. The accessory dwelling unit or ADU (as defined in section 106-2) regulations set forth in this section are established to comply with the state standards and requirements set forth in Government Code § 65852.2 and all other applicable state laws. ... (d)(3)The unit shall not be more than 16 feet in height or more than the height of the primary residential unit, whichever is more. (4)The unit shall be set back a minimum of four feet from any interior side, street side, or rear lot line.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 6).

Full Breakdown

City Code § 106-37 lets the community development director ministerially approve ADUs, no hearing, decision within 60 days, in any single-family or multi-family zone. Locally, a detached ADU tops out at 1,200 square feet, an attached one at 50 percent of the primary home's floor area, height is capped at 16 feet (or the primary home's height if taller), and setbacks run a minimum of 4 feet from interior side, street side, and rear lines. The section itself states it is subject to the preemptive limits of state ADU law (Gov. Code §§ 66310-66342, formerly § 65852.2), which controls wherever it allows more than the city does.

Violations & Fines

Denying or slow-walking a compliant ADU application, or holding it to a local limit that state law overrides, exposes the city to a state audit and possible fine under Gov. Code § 65852.2.

Frequently Asked Questions

How big can an ADU be in Ridgecrest?

Up to 1,200 square feet detached, or 50 percent of the primary home's floor area if attached, under City Code § 106-37, though state law can permit more in some cases.

Does Ridgecrest require a hearing to approve an ADU?

No, § 106-37(a) requires the city to act ministerially, without discretionary review or a hearing, within 60 days of a complete application, per state law.

Sources & Official References

[1]Ridgecrest Municipal Code, Chapter 106 (Zoning) — Municode

Other rules in Ridgecrest

Parking Rules: Street Parking LimitsSome Restrictions Shed & Carport RulesSome Restrictions Parking Rules: RV & Boat ParkingSome Restrictions Noise Ordinances: Vehicle NoiseSome Restrictions Noise Ordinances: Amplified Music & Outdoor SoundSome Restrictions Noise Ordinances: Decibel LimitsSome Restrictions Parking Rules: Driveway RulesSome Restrictions

All Ridgecrest rules

How Ridgecrest compares: Easiest Cities to Build an ADU·California rules heatmap·Compare Ridgecrest to another location·View the California accessory structures overview

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ADU Rules in Nearby Cities

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