Calimesa · Land use · Single-family home
Where is a single-family home allowed in Calimesa?
In Calimesa, a single-family home is allowed in 9 base zones (O-S-R, R-E, R-R, R-L, R-L-M and 4 more, 8 with a condition) and needs a conditional use permit in 2 (C-MU and O-MU) (Calimesa use tables, read October 2026).
Key points
- Allowed: O-S-R, R-E, R-R, R-L, R-L-M, R-M, R-H, R-MU and 1 more
- Needs a permit: C-MU and O-MU
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Calimesa 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 single-family home can go
Calimesa's code calls this use “Single-family detached”. 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 |
|---|---|---|
| O-S-R | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-E | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-R | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-L | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-L-M | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-M | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-H | Allowed — see note Note d: In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in the same zone. | § 18.20.030 |
| R-MU | Allowed | § 18.28.040 |
| O-S Open Space District | Allowed — see note Note row: Row reads: "Single-family residential – 1 dwelling unit per 20 gross acres" Note unmarked: Precise determination of any development shall be on the basis of a detailed slope analysis, biological, archaeological and paleontological assessment prior to approval of any development. | § 18.35.020 |
| C-MU | Needs a conditional use permit | § 18.28.040 |
| O-MU | Needs a conditional use permit | § 18.28.040 |
What else applies
- Standards for this use: CMC § 18.20.040-18.20.050 residential development standards (not in packet).
- State law: State law lets most single-family lots add an ADU and a JADU (California ADU law) and a second home or a lot split under SB 9 (Gov. Code § 65852.21).
- Not covered here: Residential uses in downtown business zones DVC/DNC/DVS: no single-family or duplex row (S7); Industrial L-I/B-P: tables hold no dwelling, day care, school or shelter rows; Text of overlay RIPAOZ Areas 1-2 not in packet. Overlay zones and specific plans can also change the answer.
Other uses in Calimesa
Who this affects
Frequently asked questions
Can I have a single-family home in the C-MU zone in Calimesa?
Only with a conditional use permit. Calimesa's use table lists it that way in C-MU (§ 18.28.040).
Can I have a single-family home in the O-S-R zone in Calimesa?
Yes, with a condition. Calimesa's use table lists it as allowed in O-S-R (§ 18.20.030). The code adds a condition: “In all cases, supportive housing and transitional housing are and shall be treated as residential uses, subject only to the permitting requirements that apply to residential uses of the same housing type location in…”
General information, not legal advice.
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