California ADU rules · Merced County
Can I Build an ADU in Livingston?
Yes — you can build an ADU in Livingston. California's statewide ADU law requires every city, including Livingston, to approve a qualifying accessory dwelling unit by right, plus a junior ADU (JADU) on a single-family lot. What varies city to city are the local specifics below.
Can you build one?
ADUs allowed
CA state lawYes — by right
ADUs and JADUs are allowed by right in all residential and mixed-use zones; ministerial approval, no hearing.
Units on a single-family lot
CA state law1 ADU + 1 JADU
At least one ADU and one JADU per single-family lot (a conversion ADU may also be possible).
Units on a multifamily lot
Local ruleconversions (>=1 or 25% of units) + up to 2 detached
Local cap of 2 detached ADUs per multifamily lot, not 8 as in state baseline.
Junior ADU (JADU)
CA state lawAllowed
Up to 500 sq ft, within the walls of an existing single-family home (single-family lots only).
Size & height
Max detached ADU size
Local rule1,200 sq ft
Local maximum matches state cap, but is explicitly stated.
Max attached ADU size
Local rule50% of primary, >=850 (>=1,000 for 2+ bedrooms)
Local code restates state minimums and 50% rule.
Guaranteed minimum size
CA state law800 sq ft
An 800 sq ft ADU must be allowed regardless of FAR/lot-coverage caps; a city also cannot cap an attached ADU below 850 sq ft (1,000 for 2+ bedrooms).
Max JADU size
CA state law500 sq ft
Max height
Local rule16 ft
No local transit or 2-story exceptions; follows state for those.
Setbacks
Side setback
Local rule4 ft
State minimum, but local code also specifies street side setback.
Rear setback
CA state law4 ft
Front setback
Local rule20 feet
Local code specifies 20 ft front setback for ADUs.
Separation from main house
Local ruleNone required
No specific separation required beyond building code.
Parking
Parking required
Local ruleUp to 1 space
One per ADU or per bedroom, whichever is less; exemptions per state.
Transit parking exemption
CA state lawYes — no parking required near transit & for conversions
No parking may be required within ½ mi walking distance of transit, in a historic district, for an ADU within an existing structure, within one block of car-share, or in certain permit-parking areas.
Garage-conversion replacement parking
Local ruleNot required
No replacement required for converted/demolished garage.
Approval, timeline & cost
Approval path
CA state lawMinisterial (by right)
No public hearing or discretionary design review for a qualifying ADU.
Approval timeline
CA state law60 days
The agency must act within 60 days of a complete application — and the ADU is deemed approved if it does not.
Owner-occupancy
Local ruleOnly for a JADU
No owner-occupancy for ADUs approved 2020-2025; JADU requires owner occupancy.
Impact-fee waiver
CA state lawWaived under 750 sq ft
An ADU of 750 sq ft or less pays no impact fees (the 750 sq ft threshold itself is exempt under § 66311.5); larger ADUs pay fees proportional to the primary dwelling. JADUs (≤ 500 sq ft) are exempt.
Permits required
Local ruleBuilding permit
Must comply with building, fire, and health/safety codes.
Livingston-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Historic District
ADUs in historic districts are exempt from parking requirements.
Fire Code Compliance
ADUs must comply with fire codes; sprinklers not required if not required for primary dwelling.
Livingston limits detached ADUs on multifamily lots to two per lot, and requires a 20-foot front setback for ADUs. Historic districts provide a parking exemption, and fire sprinklers are not required unless the primary dwelling requires them.
Frequently asked questions
Can I build an ADU in Livingston?
Yes. California's statewide ADU law requires Livingston to approve a qualifying accessory dwelling unit ministerial (by right), plus a junior ADU (JADU) on a single-family lot.
How big can an ADU be in Livingston?
A detached ADU of at least 1,200 sq ft must be allowed, and an ADU of 800 sq ft can never be zoned out by floor-area or lot-coverage limits. A JADU can be up to 500 sq ft.
What are the setback requirements for an ADU in Livingston?
Side and rear setbacks are limited to 4 ft. 20 feet.
Is parking required for an ADU in Livingston?
Up to 1 space. No parking can be required within ½ mile of transit, for conversions, or for units inside the primary home. When a garage is converted, replacement parking is not required.
How long does ADU approval take in Livingston?
A complete application must be acted on within 60 days, with ministerial (by right) — no public hearing or discretionary design review for a qualifying ADU.
Do I have to live on the property to build an ADU in Livingston?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Livingston Municipal Code § 5-5-6 (Ord. 659, 6-21-2022)
- § 5-5-6(E)(3)-(6)
- § 5-5-6(F)(1)(b)
- § 5-5-6(F)(1)(a)
- § 5-5-6(E)(5), (E)(6)(b)
- § 5-5-6(F)(3)
- § 5-5-6(F)(3)(c)
- § 5-5-6(H), (I)
- § 5-5-6(H)(3)
- § 5-5-6(J), (K)
- § 5-5-6(F)(4)(b)
- § 5-5-6(D)(6)
- Cal. Gov. Code §§ 66310–66342 (ADU Law)
- HCD 2025 Accessory Dwelling Unit Handbook
- Cal. Gov. Code § 66317 (ministerial approval, 60-day deadline)
- Cal. Gov. Code § 66323 (by-right ADU/JADU, 800 sq ft, 4-ft setbacks)
- Cal. Gov. Code § 66333 (junior ADUs)
- Cal. Gov. Code § 66321 (size minimums & height)
- Cal. Gov. Code § 66322 (ADU parking; § 66334 covers JADU parking)
- Cal. Gov. Code § 66311.5 (impact fees: none for an ADU ≤ 750 sq ft or JADU ≤ 500 sq ft)
Last updated 2026-06-25. This is an AI-assisted summary of Livingston's ADU rules, drawn from its published ordinance and California ADU law — general information, not legal advice, and it may be incomplete or out of date. Verify the controlling rule for your specific parcel with Livingston Planning before relying on it.
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