Rialto · Zoning · A-P
Rialto A-P zoning: height, setbacks and lot size
In Rialto's A-P zone, generally buildings can be up to 75 ft (6 stories) tall, the front setback is 25 ft and the minimum lot size is 8,000 sq ft, with the conditions listed below (Rialto code, read October 2026).
Key points
- Maximum building height: 75 ft (or six stories)
- Maximum number of stories: 6 stories
- Minimum front setback: 25 ft
- Minimum side setback: 10% of lot width, min 3 ft, max 5 ft (Interior lots; side yard is 10 percent of lot width, but need not exceed 5 feet nor be less than 3 feet)
- Minimum rear setback: 15 ft
- Minimum lot size: 8,000 sq ft
A-P (Administrative-Professional-Institutional Zone) is a zoning district in Rialto. Every value below was read from the Rialto 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-P
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 | 75 ft Applies: or six stories § 18.26.050 · code textD. Building height limit: six stories or seventy-five feet; |
|---|---|
| Maximum number of stories | 6 stories § 18.26.050 · code textD. Building height limit: six stories or seventy-five feet; |
| Minimum front setback | 25 ft § 18.26.050 · code textE. Front yard: twenty-five feet; |
| Minimum side setback | 10% of lot width, min 3 ft, max 5 ft Applies: Interior lots; side yard is 10 percent of lot width, but need not exceed 5 feet nor be less than 3 feet § 18.26.050 · code text1. On interior lots the side yard shall be ten percent of the width of the lot, but need not exceed five feet nor may it be less than three feet, |
| Minimum rear setback | 15 ft § 18.26.050 · code textG. Rear yard: fifteen feet; |
| Minimum lot size | 8,000 sq ft § 18.26.050 · code textA. Lot area: eight thousand square feet; |
When a different number applies
The code sets other values for particular lots, buildings or locations in A-P:
- Minimum side setback: 10 ft — Corner lots; side yard abutting the street § 18.26.050
- Minimum side setback: 2 ft additional per story above the second — Interior side yards for each story above the second § 18.26.050
Not on this page
We did not find a general lot coverage, FAR, density limit for A-P in the zoning tables we read. The code may still set one elsewhere — check the Rialto Municipal Code.
Other Rialto zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Rialto's A-P zone?
75 ft (or six stories) — Rialto Municipal Code § 18.26.050.
What is the maximum number of stories in Rialto's A-P zone?
6 stories — Rialto Municipal Code § 18.26.050.
What is the minimum front setback in Rialto's A-P zone?
25 ft — Rialto Municipal Code § 18.26.050.
What is the minimum side setback in Rialto's A-P zone?
10% of lot width, min 3 ft, max 5 ft (interior lots; side yard is 10 percent of lot width, but need not exceed 5 feet nor be less than 3 feet) — Rialto Municipal Code § 18.26.050.
What is the minimum rear setback in Rialto's A-P zone?
15 ft — Rialto Municipal Code § 18.26.050.
General information, not legal advice.
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