Upland · Land use · Duplex
Where is a duplex allowed in Upland?
In Upland, a duplex is allowed in 5 base zones (RM-10, RM-20, RM-30, RM-40 and B/R-MU, 4 with a condition) and not allowed in 19 (Upland use tables, read October 2026).
Key points
- Allowed: RM-10, RM-20, RM-30, RM-40 and B/R-MU
- Not allowed: RS-20, RS-15, RS-10, RS-7.5, RS-4, RS-MH, C/R-MU, C/O-MU and 11 more
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Upland 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
Upland's code calls this use “Duplex Home”. 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 |
|---|---|---|
| RM-10 | Allowed — see note Note 2: Duplexes shall only be permitted at a density of one unit per 7,500 square feet of lot area. | § 17.04.020 |
| RM-20 | Allowed — see note Note 2: Duplexes shall only be permitted at a density of one unit per 7,500 square feet of lot area. | § 17.04.020 |
| RM-30 | Allowed — see note Note 2: Duplexes shall only be permitted at a density of one unit per 7,500 square feet of lot area. | § 17.04.020 |
| RM-40 | Allowed — see note Note 2: Duplexes shall only be permitted at a density of one unit per 7,500 square feet of lot area. | § 17.04.020 |
| B/R-MU | Allowed | § 17.05.020 |
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: Title 18 legacy specific-plan zone chapters (see zones); Animal keeping for non-commercial purposes: "See Title 6 of the Upland Municipal Code" (not in packet). Overlay zones and specific plans can also change the answer.
Other uses in Upland
Who this affects
Frequently asked questions
Can I have a duplex in the RS-20 zone in Upland?
No. Upland's use table does not allow it in RS-20 (§ 17.04.020).
Can I have a duplex in the RM-10 zone in Upland?
Yes, with a condition. Upland's use table lists it as allowed in RM-10 (§ 17.04.020). The code adds a condition: “Duplexes shall only be permitted at a density of one unit per 7,500 square feet of lot area.”
General information, not legal advice.
Ask about a duplex at an address in Upland
Ask GoCodebook what the zoning at a specific address allows and get an answer that cites the section.
Ask your question