Riverside, CA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Front setback range
- 20 ft (R-1-7000) to 40 ft (RA-5)
- Side setback range
- 7.5 ft to 25 ft depending on zone
- Rear setback range
- 25 ft to 100 ft (RR zone)
- Governing table
- Table 19.100.040.A, RMC § 19.100.040
- Measurement rule
- measured at right angles from property line
- Porch exception
- open front porches may encroach up to 6 ft
Summary
Riverside's residential zones each carry their own minimum front, side, and rear setbacks under Table 19.100.040.A: front setbacks range from 20 feet in the R-1-7000 zone up to 40 feet in RA-5, while side setbacks run as low as 7.5 feet and rear setbacks reach 100 feet in the Rural Residential (RR) zone. Zone-specific exceptions further modify these minimums for small or legacy lots.
Single-family Residential Zones: RA-5 | RC | RR | RE | R-1-1/2 Acre | R-1-13000 | R-1-10500 | R-1-8500 | R-1-7000. Setbacks - Minimum. A. Front: 40 ft. | 30 ft. | 30 ft. | 30 ft. | 30 ft | 25 ft | 25 ft. | 25 ft. | 20 ft. B. Side: 20 ft. | 25 ft. | 20 ft. | 25. ft. | 20 ft. | 15 ft. | 10/15 ft. | 7.5/12.5 ft. | 7.5/10 ft. C. Rear: 25 ft. | 25 ft. | 100 ft. | 30 ft. | 35 ft. | 30 ft. | 25 ft. | 25 ft. | 25 ft.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 33).
Full Breakdown
040. Front setbacks scale with zone density: RA-5 requires 40 feet, RC and RR require 30 feet, RE requires 30 feet, and the R-1 series steps down from 30 feet (R-1-1/2 Acre) to 20 feet (R-1-7000) as lot sizes shrink. 5 feet on one side in the R-1-8500 and R-1-7000 zones, where the code allows a smaller side yard on one side paired with a larger one on the other. Rear setbacks are largest in RR (100 feet) and drop to 25 feet across most of the R-1 series.
030 separately governs how those distances are measured: setbacks are measured at right angles from the designated property line, with the setback line drawn parallel to it at the required distance. Several built-in exceptions modify the table figures: in the R-1 Zones, open front porches without habitable space above may encroach up to six feet into the front setback; where a garage sits ten or more feet back from the required front line, habitable space may extend five feet into that setback on local streets; and portions of a dwelling may encroach up to ten feet into the required rear setback, capped at 500 square feet of encroachment area. Smaller legally created lots within the RR and R-1 zones are shifted onto the setback standards of a smaller-lot zone.
Violations & Fines
Building within the required setback without an approved exception or a granted variance violates RMC § 19.100.040 and is enforceable under RMC § 1.01.110: an infraction fine up to $250, or a misdemeanor up to $1,000 and six months in County Jail for a willful or repeat violation, with the Building Official able to withhold or revoke a permit issued in conflict with the Zoning Code under § 19.090.040.
Frequently Asked Questions
What is the minimum front setback for a typical Riverside single-family lot?
How are setback distances measured on a Riverside property?
Can a covered porch extend into the required front setback?
Sources & Official References
Other rules in Riverside
California rules heatmap·Compare Riverside to another location·View the California building setbacks & zoning overview
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Setback Rules in Nearby Cities
How other cities in Riverside County handle setback rules.