Riverside · Zoning · R-3-4000
Riverside R-3-4000 zoning: height, setbacks and lot size
In Riverside's R-3-4000 zone, buildings can be up to 30 ft (2 stories) tall, the front setback is 25 ft and the minimum lot size is 30,000 sq. ft. (Riverside code, read October 2026).
Key points
- Maximum building height: 30 ft
- Maximum number of stories: 2 stories (up to 60% of units may be in three-story buildings of at most 40 ft)
- Minimum front setback: 25 ft
- Minimum side setback: 10 ft
- Minimum rear setback: 20 ft
- Minimum lot size: 30,000 sq. ft.
- Maximum density: 10.9 dwelling units per gross acre
R-3-4000 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 R-3-4000
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 | 30 ft § 19.100.040 · code textTable row “Building Height 3, 5, 6, 7 - Maximum”, column “R-3-4000”: 30 ft./40 ft. 2 |
|---|---|
| Maximum number of stories | 2 stories Applies: up to 60% of units may be in three-story buildings of at most 40 ft § 19.100.040 · code textTable row “Number of Stories 5, 6, 7 - Maximum”, column “R-3-4000”: 2 2 |
| Minimum front setback | 25 ft § 19.100.040 · code textTable row “A. Front 1”, column “R-3-4000”: 25 ft. |
| Minimum side setback | 10 ft § 19.100.040 · code textTable row “C. Interior Side 1”, column “R-3-4000”: 10 ft. |
| Minimum rear setback | 20 ft § 19.100.040 · code textTable row “E. Rear 1”, column “R-3-4000”: 20 ft. |
| Minimum lot size | 30,000 sq. ft. § 19.100.040 · code textTable row “Lot Area - Minimum 7”, column “R-3-4000”: 30,000 sq. ft. |
| Maximum density | 10.9 dwelling units per gross acre § 19.100.040 · code textTable row “Density - Maximum (Dwelling Units per Gross Acre) 5”, column “R-3-4000”: 10.9 |
When a different number applies
The code sets other values for particular lots, buildings or locations in R-3-4000:
- Maximum building height: 40 ft — Up to 60% of units may be located in three-story buildings. § 19.100.040
- Maximum number of stories: 3 stories — Up to 60% of units may be located in three-story buildings with a maximum height of 40 feet. § 19.100.040
Not on this page
We did not find a general lot coverage, FAR limit for R-3-4000 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 R-3-4000 zone?
30 ft — Riverside Municipal Code § 19.100.040.
What is the maximum number of stories in Riverside's R-3-4000 zone?
2 stories (up to 60% of units may be in three-story buildings of at most 40 ft) — Riverside Municipal Code § 19.100.040.
What is the minimum front setback in Riverside's R-3-4000 zone?
25 ft — Riverside Municipal Code § 19.100.040.
What is the minimum side setback in Riverside's R-3-4000 zone?
10 ft — Riverside Municipal Code § 19.100.040.
What is the minimum rear setback in Riverside's R-3-4000 zone?
20 ft — Riverside Municipal Code § 19.100.040.
General information, not legal advice.
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