Riverside · Zoning · O
Riverside O zoning: height, setbacks and lot size
In Riverside's O zone, generally buildings can be up to 40 ft tall, the front setback is 15 ft and the minimum lot size is 20,000 sq. ft., with the conditions listed below (Riverside code, read October 2026).
Key points
- Maximum building height: 40 ft
- Minimum front setback: 15 ft (increases by 2 ½ ft for each story over the second)
- Minimum side setback: 5 ft (interior side; 15 ft on a street side; increases by 2 ½ ft for each story over the second)
- Minimum rear setback: 15 ft
- Minimum lot size: 20,000 sq. ft. (a master plan for the center, or for reuse of existing infill lots, may allow smaller lots)
- Maximum floor area ratio (FAR): 1.0
O is a zoning district in Riverside. Every value below was read from the Riverside 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 O
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 § 19.110.030 · code textTable row “Building Height - Maximum”, column “O”: 40 ft. |
|---|---|
| Minimum front setback | 15 ft Applies: increases by 2 ½ ft for each story over the second § 19.110.030 · code textTable row “Front Yard Setback - Minimum”, column “O”: 15 ft. |
| Minimum side setback | 5 ft Applies: interior side; 15 ft on a street side; increases by 2 ½ ft for each story over the second This is the street-side setback on a corner lot; an interior side setback can differ. § 19.110.030 · code textTable row “Side Yard Setback - Minimum A. Interior Side B. Street Side”, column “O”: 5 ft. 15 ft. |
| Minimum rear setback | 15 ft § 19.110.030 · code textTable row “Rear Yard Setback - Minimum”, column “O”: 15 ft. |
| Minimum lot size | 20,000 sq. ft. Applies: a master plan for the center, or for reuse of existing infill lots, may allow smaller lots § 19.110.030 · code textTable row “Lot Area - Minimum”, column “O”: 20,000 sq. ft. |
| Maximum floor area ratio (FAR) | 1.0 § 19.110.030 · code textTable row “Floor-Area-Ration (FAR) - Maximum”, column “O”: 1.0 |
Not on this page
We did not find a general stories, lot coverage, density limit for O in the zoning tables we read. The code may still set one elsewhere — check the Riverside Municipal Code.
Other Riverside zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Riverside's O zone?
40 ft — Riverside Municipal Code § 19.110.030.
What is the minimum front setback in Riverside's O zone?
15 ft (increases by 2 ½ ft for each story over the second) — Riverside Municipal Code § 19.110.030.
What is the minimum side setback in Riverside's O zone?
5 ft (interior side; 15 ft on a street side; increases by 2 ½ ft for each story over the second) — Riverside Municipal Code § 19.110.030. The code attaches notes or conditions to this value; read the section before relying on it.
What is the minimum rear setback in Riverside's O zone?
15 ft — Riverside Municipal Code § 19.110.030.
What is the minimum lot size in Riverside's O zone?
20,000 sq. ft. (a master plan for the center, or for reuse of existing infill lots, may allow smaller lots) — Riverside Municipal Code § 19.110.030.
General information, not legal advice.
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