Riverside County · Zoning · A-1
Riverside County A-1 zoning: height, setbacks and lot size
In Riverside County's A-1 zone, generally buildings can be up to 40 ft tall, the front setback is 20 ft and the minimum lot size is 20,000 sq ft, with the conditions listed below (Riverside County code, read October 2026).
Key points
- Maximum building height: 40 ft (one-family residences)
- Minimum front setback: 20 ft
- Minimum side setback: 5 ft
- Minimum rear setback: 10 ft
- Minimum lot size: 20,000 sq ft (unless larger minimum lot area and dimensions are specified for a particular area or use)
A-1 (LIGHT AGRICULTURE 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 A-1
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: one-family residences § 17.120.020 · code textOne-family residences shall not exceed forty (40) feet in height. |
|---|---|
| Minimum front setback | 20 ft § 17.120.020 · code textMinimum yard requirements shall be twenty (20) feet front yard, five feet side yard, and ten (10) feet rear yard. |
| Minimum side setback | 5 ft § 17.120.020 · code textMinimum yard requirements shall be twenty (20) feet front yard, five feet side yard, and ten (10) feet rear yard. |
| Minimum rear setback | 10 ft § 17.120.020 · code textMinimum yard requirements shall be twenty (20) feet front yard, five feet side yard, and ten (10) feet rear yard. |
| Minimum lot size | 20,000 sq ft Applies: unless larger minimum lot area and dimensions are specified for a particular area or use § 17.120.020 · code textLot size shall not be less than twenty thousand (20,000) square feet, with a minimum average lot width of one hundred (100) feet and a minimum average lot depth of one hundred fifty (150) feet, unless larger minimum lot area and dimensions are specified for a particular area or use, except as follows: |
When a different number applies
The code sets other values for particular lots, buildings or locations in A-1:
- Maximum building height: 50 ft — other building or structure, unless a greater height is approved pursuant to section 17.172.230 § 17.120.020
- Maximum building height: 75 ft — No building may exceed this, and no other structure may exceed 105 ft, unless a variance is approved § 17.120.020
Not on this page
We did not find a general stories, lot coverage, FAR, density limit for A-1 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 A-1 zone?
40 ft (one-family residences) — Riverside County Municipal Code § 17.120.020.
What is the minimum front setback in Riverside County's A-1 zone?
20 ft — Riverside County Municipal Code § 17.120.020.
What is the minimum side setback in Riverside County's A-1 zone?
5 ft — Riverside County Municipal Code § 17.120.020.
What is the minimum rear setback in Riverside County's A-1 zone?
10 ft — Riverside County Municipal Code § 17.120.020.
What is the minimum lot size in Riverside County's A-1 zone?
20,000 sq ft (unless larger minimum lot area and dimensions are specified for a particular area or use) — Riverside County Municipal Code § 17.120.020.
General information, not legal advice.
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