California ADU rules · Los Angeles County
Can I Build an ADU in Pico Rivera?
Yes — you can build an ADU in Pico Rivera. California's statewide ADU law requires every city, including Pico Rivera, 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
CA state lawConversion ADUs (≥1, up to 25% of units) + up to 8 detached
Conversions of non-livable space (at least 1, or up to 25% of existing units) plus up to 8 detached ADUs on a lot with existing multifamily — never exceeding the number of existing units. JADUs are single-family only.
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 rule1,000 sq ft
Pico Rivera caps a DETACHED ADU at 1,000 sq ft (its handout ranges detached ADUs '800 to 1,000 square feet'), below the 1,200 sq ft statewide default. 800 sq ft remains the state-protected by-right floor a city cannot zone below; 1,000 sq ft is Pico Rivera's local maximum, not the floor.
Max attached ADU size
Local rule50% of the primary dwelling, but at least 800 sq ft is allowed
Pico Rivera's handout states an attached ADU 'shall not exceed 50% of the primary dwelling, or at least a minimum of 800 square feet.' State law guarantees at least 850 sq ft (1,000 for 2+ bedrooms) for an attached ADU regardless of the 50% rule, so the state minimum controls where higher.
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
CA state law16 ft
16 ft baseline; cities must allow 18 ft within ½ mi of a major transit stop or where the primary dwelling is two-story, and 20 ft on a lot with a multistory multifamily building.
Setbacks
Side setback
CA state law4 ft
A city cannot require more than 4 ft side or rear setback; conversions of existing structures are exempt.
Rear setback
CA state law4 ft
Front setback
CA state lawNo front setback may block the mandatory 800 sq ft / 16-ft / 4-ft-setback ADU; otherwise per base zone
Separation from main house
Local rule10 ft
A new ADU must keep a 10-ft wall-to-wall separation from any other occupied structure, 5 ft from an accessory structure (garage/patio cover/shed), and a 3-ft minimum roof-eave separation. State law sets no separation; converting a legally existing structure is exempt.
Parking
Parking required
CA state lawUp to 1 space
At most 1 space per ADU (or per bedroom, whichever is less) — and waived in the common cases below.
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
CA state lawNot required
When a garage/carport is demolished or converted to build an ADU, replacement parking cannot be required.
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
CA state lawOnly for a JADU
No owner-occupancy requirement for ADUs (the prior sunset was removed). A JADU may require owner-occupancy, principally where it shares sanitation with the main house.
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
CA state lawBuilding permit
Only a ministerial building permit — no conditional use permit or discretionary design review for a qualifying ADU.
Pico Rivera-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Objective design standards — match the primary dwelling
Materials, colors, roof slope, windows and doors of the ADU must match the appearance and architectural design of the primary dwelling, and the ADU must have its own independent exterior access.
LA County Sanitation connection fee receipt required
Pico Rivera requires an LA County Sanitation District connection-fee receipt before issuing an ADU building permit (school fees may also apply) — an extra pre-permit step.
No short-term rentals (30-day minimum)
Rental of a Pico Rivera ADU must be for a term longer than 30 days; short-term/vacation rental of an ADU is not allowed.
Pico Rivera does have a local ADU ordinance (Title 18 Zoning Code) with a current official handout — not a deferral to state law. Its standout local rules: a detached-ADU size cap of 1,000 sq ft (below the 1,200 state default), explicit building-separation rules (10 ft to occupied structures, 5 ft to accessory structures, 3-ft eaves), objective design standards requiring the ADU to match the primary dwelling, a 30-day minimum rental term, and an LA County Sanitation connection-fee receipt before permit. The city also offers free pre-approved ADU plans. Junior ADUs still carry owner-occupancy and a recorded deed restriction, as state law allows. Verify exact Title 18 subsections with Pico Rivera Community & Economic Development.
Frequently asked questions
Can I build an ADU in Pico Rivera?
Yes. California's statewide ADU law requires Pico Rivera 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 Pico Rivera?
A detached ADU of at least 1,000 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 Pico Rivera?
Side and rear setbacks are limited to 4 ft. No front setback may block the mandatory 800 sq ft / 16-ft / 4-ft-setback ADU; otherwise per base zone.
Is parking required for an ADU in Pico Rivera?
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 Pico Rivera?
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 Pico Rivera?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- City of Pico Rivera ADU/JADU Regulations (Title 18 Zoning Code; official ADU handout, v. 1/8/2026)
- Pico Rivera ADU handout, Objective Design Standards
- Pico Rivera ADU handout, Other Requirements
- Pico Rivera ADU handout, General Requirements
- 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 § 66314 (local ordinance standards)
- Cal. Gov. Code § 66315 (owner-occupancy)
- Cal. Gov. Code § 66311.5 (impact fees: none for an ADU ≤ 750 sq ft or JADU ≤ 500 sq ft)
Last updated 2026-06-28. This is an AI-assisted summary of Pico Rivera'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 Pico Rivera Planning before relying on it.
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