Los Angeles County · Land use · Duplex
Where is a duplex allowed in Los Angeles County?
In Los Angeles County, a duplex is needs a permit in 8 (R-2, R-3, R-4, C-H, C-1 and 3 more, all with a condition) and not allowed in 9 (Los Angeles County use tables, read October 2026).
Key points
- Needs a permit: R-2, R-3, R-4, C-H, C-1, C-2, C-3 and C-M
- Not allowed: R-A, R-1, R-5, C-MJ, C-R, M-1, M-1.5, M-2 and 1 more
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Los Angeles County Municipal Code use tables (read October 2026). Base zones only. General information, not legal advice — check with the city before you apply.
Zones where a duplex can go
Los Angeles County's code calls this use “Two-family residences”. Each row links to the use table it comes from. A zone marked “see note” has a condition in the code, for example upper floors only or a larger lot.
| Zone | Status | Code |
|---|---|---|
| R-2 | Needs a ministerial site plan review — see note Note 8: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.18.030 |
| R-3 | Needs a ministerial site plan review — see note Note 8: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.18.030 |
| R-4 | Needs a ministerial site plan review — see note Note 8: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.18.030 |
| C-H | Needs a ministerial site plan review if the lot meets the note 18 criteria; otherwise conditional use permit (note 26) — see note Note 18: The lot shall be: 1) outside of a Very High Fire Hazard Severity Zone, as depicted in the General Plan, in its entirety; 2) outside of the Coastal Zone, as defined in Division 2 (Definition), in its entirety; 3) outside of a Significant Ecological Area, as depicted in the General Plan, in its entirety; 4) outside of a Hillside Management Area, as depicted in the General Plan, in its entirety; 5) outside of the 70 or above decibel Community Noise Equivalent Level (dB CNEL) noise contour of an Airport Influence Area, as depicted in the General Plan, in its entirety; 6) served by a public water system; 7) served by a public sewer system; and 8) fronting a highway or a public street. Note 26: Where the lot does not meet the criteria specified in Note 18, above. Note 25: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.20.030 |
| C-1 | Needs a ministerial site plan review if the lot meets the note 18 criteria; otherwise conditional use permit (note 26) — see note Note 18: The lot shall be: 1) outside of a Very High Fire Hazard Severity Zone, as depicted in the General Plan, in its entirety; 2) outside of the Coastal Zone, as defined in Division 2 (Definition), in its entirety; 3) outside of a Significant Ecological Area, as depicted in the General Plan, in its entirety; 4) outside of a Hillside Management Area, as depicted in the General Plan, in its entirety; 5) outside of the 70 or above decibel Community Noise Equivalent Level (dB CNEL) noise contour of an Airport Influence Area, as depicted in the General Plan, in its entirety; 6) served by a public water system; 7) served by a public sewer system; and 8) fronting a highway or a public street. Note 26: Where the lot does not meet the criteria specified in Note 18, above. Note 25: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.20.030 |
| C-2 | Needs a ministerial site plan review if the lot meets the note 18 criteria; otherwise conditional use permit (note 26) — see note Note 18: The lot shall be: 1) outside of a Very High Fire Hazard Severity Zone, as depicted in the General Plan, in its entirety; 2) outside of the Coastal Zone, as defined in Division 2 (Definition), in its entirety; 3) outside of a Significant Ecological Area, as depicted in the General Plan, in its entirety; 4) outside of a Hillside Management Area, as depicted in the General Plan, in its entirety; 5) outside of the 70 or above decibel Community Noise Equivalent Level (dB CNEL) noise contour of an Airport Influence Area, as depicted in the General Plan, in its entirety; 6) served by a public water system; 7) served by a public sewer system; and 8) fronting a highway or a public street. Note 26: Where the lot does not meet the criteria specified in Note 18, above. Note 25: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.20.030 |
| C-3 | Needs a ministerial site plan review if the lot meets the note 18 criteria; otherwise conditional use permit (note 26) — see note Note 18: The lot shall be: 1) outside of a Very High Fire Hazard Severity Zone, as depicted in the General Plan, in its entirety; 2) outside of the Coastal Zone, as defined in Division 2 (Definition), in its entirety; 3) outside of a Significant Ecological Area, as depicted in the General Plan, in its entirety; 4) outside of a Hillside Management Area, as depicted in the General Plan, in its entirety; 5) outside of the 70 or above decibel Community Noise Equivalent Level (dB CNEL) noise contour of an Airport Influence Area, as depicted in the General Plan, in its entirety; 6) served by a public water system; 7) served by a public sewer system; and 8) fronting a highway or a public street. Note 26: Where the lot does not meet the criteria specified in Note 18, above. Note 25: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.20.030 |
| C-M | Needs a conditional use permit — see note Note 25: Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits). | § 22.20.030 |
Zones where it is not allowed
What else applies
- Standards for this use: Section 22.140.520 (Additional Regulations column).
- No SB 9 row in the base zone tables. S7 mixed-use sub-table: C-RU -, MXD-RU SPR (only as part of a mixed-use development).
- State law: SB 9 (Gov. Code § 65852.21) allows two homes on most single-family lots with a ministerial permit, also where this table says no.
- Not covered here: M-3: S5 says premises 'may be used for any use' except the listed exceptions, so no per-use row exists; not comparable, no cells given; B-1 and B-2: S6 is a short list of allowed items (parking, landscaping, grading etc.) with none of the 16 uses; no cells given; Zone W has no cell for several uses because the row is '-' (given as no); Zones O-S/R-R/W belong to the Resort/Open space group in S1; Overlay and special districts in S8 to S70 (Santa Monica Mountains LIP, Coastal specific plans, Billboard, Parking, Equestrian, Green Zone, TOD specific plan) are not base zones and were not used. Overlay zones and specific plans can also change the answer.
Other uses in Los Angeles County
Who this affects
HomeownersBuyersReal estate agentsSmall developers
Frequently asked questions
Can I have a duplex in the R-2 zone in Los Angeles County?
Only with a ministerial site plan review. Los Angeles County's use table lists it that way in R-2 (§ 22.18.030). The code adds a condition: “Use may also be subject to Chapter 22.120 (Density Bonus), Chapter 22.121 (Inclusionary Housing), or Chapter 22.166 (Housing Permits).”
Can I have a duplex in the R-A zone in Los Angeles County?
No. Los Angeles County's use table does not allow it in R-A (§ 22.18.030).
General information, not legal advice.
Ask about a duplex at an address in Los Angeles County
Ask GoCodebook what the zoning at a specific address allows and get an answer that cites the section.
Ask your question