Riverside County · Zoning · M-M
Riverside County M-M zoning: height, setbacks and lot size
In Riverside County's M-M zone, generally buildings can be up to 40 ft tall, the front setback is None required and the minimum lot size is 10,000 sq ft, with the conditions listed below (Riverside County code, read October 2026).
Key points
- Maximum building height: 40 ft (At the yard setback line)
- Minimum front setback: None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M)
- Minimum side setback: None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M)
- Minimum rear setback: None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M)
- Minimum lot size: 10,000 sq ft (7,000 sq ft (average width 65 ft) may be permitted when sewers are available and used)
M-M (Manufacturing-Medium Zone) is a zoning district in Riverside County. Every value below was read from the Riverside County Municipal Code and links to its section (read October 2026). State laws such as the ADU and SB 9 rules can allow more on a residential lot. General information, not legal advice — read the code text and check with the city before you build.
Development standards in M-M
The general rule for a typical lot in this zone. Zoning tables often attach notes, such as rules for corner lots, lots next to a residential zone, or new subdivisions only. Open “code text” under a value to see the table cell or sentence it was read from.
| Maximum building height | 40 ft Applies: At the yard setback line § 17.104.040 · code textStructures shall not exceed forty (40) feet at the yard setback line. |
|---|---|
| Minimum front setback | None required Applies: where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040 · code textWhere the front side or rear yard adjoins a lot with a zoning classification other than those specified in subsection (B)(1) of this section, there is no minimum setback. |
| Minimum side setback | None required Applies: where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040 · code textWhere the front side or rear yard adjoins a lot with a zoning classification other than those specified in subsection (B)(1) of this section, there is no minimum setback. |
| Minimum rear setback | None required Applies: where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040 · code textWhere the front side or rear yard adjoins a lot with a zoning classification other than those specified in subsection (B)(1) of this section, there is no minimum setback. |
| Minimum lot size | 10,000 sq ft Applies: 7,000 sq ft (average width 65 ft) may be permitted when sewers are available and used § 17.104.040 · code textThe minimum lot size shall be ten thousand (10,000) square feet with a minimum average width of seventy-five (75) feet, except that a lot size not less than seven thousand (7,000) square feet and an average width of not less than sixty-five (65) feet may be permitted when sewers are available and will be utilized for the development. |
When a different number applies
The code sets other values for particular lots, buildings or locations in M-M:
- Maximum building height: 50 ft — Buildings; unless a height up to 75 feet is approved pursuant to section 17.172.230 § 17.104.040
- Maximum building height: 75 ft — Buildings, when approved pursuant to section 17.172.230 § 17.104.040
- Maximum building height: 50 ft — Structures other than buildings; unless a height up to 105 feet is approved pursuant to section 17.172.230 § 17.104.040
- Maximum building height: 105 ft — Structures other than buildings, when approved pursuant to section 17.172.230 § 17.104.040
- Minimum front setback: 25 ft — Where the front yard adjoins a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040
- Minimum side setback: 25 ft — Where the side yard adjoins a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040
- Minimum rear setback: 25 ft — Where the rear yard adjoins a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M § 17.104.040
- Minimum lot size: 7,000 sq ft — Sewers are available and will be utilized for the development § 17.104.040
Not on this page
We did not find a general stories, lot coverage, FAR, density limit for M-M in the zoning tables we read. The code may still set one elsewhere — check the Riverside County Municipal Code.
Other Riverside County zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Riverside County's M-M zone?
40 ft (at the yard setback line) — Riverside County Municipal Code § 17.104.040.
What is the minimum front setback in Riverside County's M-M zone?
None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M) — Riverside County Municipal Code § 17.104.040.
What is the minimum side setback in Riverside County's M-M zone?
None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M) — Riverside County Municipal Code § 17.104.040.
What is the minimum rear setback in Riverside County's M-M zone?
None required (where the yard does not adjoin a lot zoned R-R, R-1, R-A, R-2, R-3, R-4, R-6, R-T, R-T-R or W-2-M) — Riverside County Municipal Code § 17.104.040.
What is the minimum lot size in Riverside County's M-M zone?
10,000 sq ft (7,000 sq ft (average width 65 ft) may be permitted when sewers are available and used) — Riverside County Municipal Code § 17.104.040.
General information, not legal advice.
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