Yolo County · Land use · Duplex
Where is a duplex allowed in Yolo County?
In Yolo County, a duplex is allowed in 7 base zones (RR-5, RR-2, R-L, R-M, A-N and 2 more, all with a condition) and not allowed in 3 (Yolo County use tables, read October 2026).
Key points
- Allowed: RR-5, RR-2, R-L, R-M, A-N, A-X and A-R
- Not allowed: R-H, A-C and A-I
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Yolo 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
Yolo County's code calls this use “Two single family homes, detached or duplex (S2); Primary farm dwelling including duplex (S1)”. 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 |
|---|---|---|
| RR-5 | Allowed — see note Note Row: Specific Use Requirements: See Table 8-2.505 and Sec. 8-2.506(a), (m), and (n) | § 8-2.504 |
| RR-2 | Allowed — see note Note Row: Specific Use Requirements: See Table 8-2.505 and Sec. 8-2.506(a), (m), and (n) | § 8-2.504 |
| R-L | Allowed — see note Note Row: Specific Use Requirements: See Table 8-2.505 and Sec. 8-2.506(a), (m), and (n) | § 8-2.504 |
| R-M | Allowed — see note Note Row: Specific Use Requirements: See Table 8-2.505 and Sec. 8-2.506(a), (m), and (n) | § 8-2.504 |
| A-N Agricultural Intensive | Allowed — see note Note Row: Specific Use Requirements: See Secs. 8-2.306(x) and 306(y); 8-2.402; and 8-2.506(l) and (m) | § 8-2.304 |
| A-X | Allowed — see note Note Row: Specific Use Requirements: See Secs. 8-2.306(x) and 306(y); 8-2.402; and 8-2.506(l) and (m) | § 8-2.304 |
| A-R | Allowed — see note Note Row: Specific Use Requirements: See Secs. 8-2.306(x) and 306(y); 8-2.402; and 8-2.506(l) and (m) | § 8-2.304 |
Zones where it is not allowed
What else applies
- Attached single family units (S3: N, SP/UP(m), SP/UP(m), SP/UP(m)) are a different row.
- 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: Tribal Trust Overlay (TT-O), Agricultural District Overlay (AD-O, Clarksburg; in Sec. 8-2.401) and Special Building (B) overlay: not in the use tables; Specific plan (S-P) and PD zones: only interim agricultural uses in Table 8-2.905-1. Overlay zones and specific plans can also change the answer.
Other uses in Yolo County
Who this affects
Frequently asked questions
Can I have a duplex in the R-H zone in Yolo County?
No. Yolo County's use table does not allow it in R-H (§ 8-2.504).
Can I have a duplex in the RR-5 zone in Yolo County?
Yes, with a condition. Yolo County's use table lists it as allowed in RR-5 (§ 8-2.504). The code adds a condition: “Specific Use Requirements: See Table 8-2.505 and Sec. 8-2.506(a), (m), and (n)”
General information, not legal advice.
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