Rancho Cucamonga · Land use · Duplex
Where is a duplex allowed in Rancho Cucamonga?
In Rancho Cucamonga, a duplex is allowed in 12 base zones (VL, L, LM, M, MH and 7 more) and not allowed in 10 (Rancho Cucamonga use tables, read October 2026).
Key points
- Allowed: VL, L, LM, M, MH, H, OSC, HR and 4 more
- Not allowed: NI, IE, P, FC/UC, ME1, ME2, CO1, CO2 and 2 more
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Rancho Cucamonga 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
Rancho Cucamonga's code calls this use “Dwelling, Two-Family”. 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 |
|---|---|---|
| VL Very Low Residential (includes subzones EH 14000, EH 9000) | Allowed | § 17.30.030 |
| L Low Residential (includes L-ESP) | Allowed | § 17.30.030 |
| LM Low Medium Residential (includes subzones) | Allowed | § 17.30.030 |
| M Medium Residential (includes subzones) | Allowed | § 17.30.030 |
| MH Medium High Residential (includes MH-TV) | Allowed | § 17.30.030 |
| H High Residential (includes H-TV) | Allowed | § 17.30.030 |
| OSC Open Space Conservation | Allowed | § 17.30.030 |
| HR Hillside Residential | Allowed | § 17.30.030 |
| NE-2 | Allowed | § 17.136.020 |
| NG3L | Allowed | § 17.136.020 |
| NG3 | Allowed | § 17.136.020 |
| CE1 | Allowed | § 17.136.020 |
Zones where it is not allowed
What else applies
- 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: Specific Plan (SP) zones: uses follow each adopted specific plan; Definitions chapter (what 'Residential Care Facility', 'Assembly Use' and 'Agricultural Uses' include) and chapters 17.88 / 17.110 are not in the packet; Cells marked M/N (child day care in VL, L, LM, M and NE-2) are not resolved. Overlay zones and specific plans can also change the answer.
Other uses in Rancho Cucamonga
Who this affects
Frequently asked questions
Can I have a duplex in the NI zone in Rancho Cucamonga?
No. Rancho Cucamonga's use table does not allow it in NI (Neo-Industrial) (§ 17.30.030).
Can I have a duplex in the VL zone in Rancho Cucamonga?
Yes. Rancho Cucamonga's use table lists it as allowed in VL (Very Low Residential (includes subzones EH 14000, EH 9000)) (§ 17.30.030).
General information, not legal advice.
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