ADU Rules in Los Angeles, CA (2026)
ADU rules, permit requirements, size limits, and fees for Los Angeles, CA. Source-cited from official municipal code.
Whether ADUs are allowed in Los Angeles, CA has not been confirmed — see the official source before proceeding.
Whether Los Angeles, CA permits accessory dwelling units (ADUs) has not been confirmed from an official source. ADUs — also called granny flats, in-law units, or secondary suites — are secondary housing units on a single-family or multifamily lot. Contact the local building department through their official website to verify current ADU rules before proceeding, as regulations may have changed since this data was last reviewed.
ADU Size Limits
ADU Size Limits in Los Angeles: Detached ADU: size varies by zoning — see official source (max height: varies — see official source). Attached ADU: size varies by zoning — see official source. Junior ADU (JADU): up to 500 sq ft — must be within the existing primary dwelling or accessory structure.
| Type | Max Size | Max Height |
|---|---|---|
| Detached ADU | See official source | See official source |
| Attached ADU | See official source | See official source |
| JADU | 500 sq ft · Verified May 21, 2026 · Source | Within existing structure |
Permit Fees
ADU Permit Fees in Los Angeles: Plan check fee: Varies. Building permit fee: Varies. Impact fees: None. School fees: None or N/A. Total estimated permit cost: Varies.
| Fee Type | Amount |
|---|---|
| Plan Check | See official source |
| Building Permit | See official source |
| Impact Fees | See official source |
| School Fees | See official source |
| Total Estimate | See official source |
Permit Timeline
Los Angeles ADU Permit Timeline: Permit timeline has not been confirmed — contact the department for current processing times. Apply through the local building department online permit portal. Contact them through their official website for current contact information.
Setback Requirements
ADU Setback Requirements in Los Angeles: Front setback: follows zone standard. Side setback: no minimum. Rear setback: no minimum.
Parking Requirements
Parking Requirements: Parking requirements have not been confirmed — see official source.
Restrictions & Requirements
- ADU must comply with objective zoning and design standards
- Setback violation structures may be rebuilt as ADU in same footprint per state law
- ADU cannot be sold separately from primary dwelling (unless Urban Lot Split per Gov Code §66411.7 applies)
- Short-term rental of ADU (less than 30 days) requires Home Sharing registration
- ADU must have permanent foundation — no recreational vehicles or manufactured homes without permanent foundation
How Many ADUs Are Allowed?
Number of ADUs Allowed in Los Angeles: Single-family lots: not confirmed — see official source. Multifamily properties: not confirmed — see official source.
- Single-Family Lots
- 1 ADU + 1 JADU per single-family lot
- Multifamily Properties
- Up to 25% of existing units (minimum 2) as detached ADUs; 1 ADU per existing unit for internal conversions
Statewide Preemption
ADU Preemption
California state law preempts local ADU rules — local governments cannot impose stricter standards.
View California preemption detailsState Law & Preemption
State Preemption: CA state law preempts local ADU restrictions. Los Angeles must approve compliant ADU applications by right.
Frequently Asked Questions
Can I build an ADU in Los Angeles?
Yes. Los Angeles, CA allows accessory dwelling units. On a single-family lot you can build 1 ADU + 1 JADU per single-family lot.
Do I have to live on-site to have an ADU in Los Angeles?
Owner-occupancy requirement in Los Angeles: No additional standards, other than those provided in Section 66314, shall be used or imposed, including an owner-occupant requirement, except that a local agency may require that the property may be used for rentals of terms 30 days or longer.
Source: LAMC Section 12.22 A.33 (Ordinance 186,481, eff 2019-12-19); California Government Code Chapter 13 §§66314–66333 (Stats. 2024 Ch. 7 §20). Last verified April 7, 2026. View source