Setback Rules: Ontario vs Rialto
How do setback rules rules compare between Ontario, CA and Rialto, CA?
Ontario and Rialto have similar restriction levels.
Ontario, CA
San Bernardino County
Ontario single-family zones require a 20-foot front setback, 5-foot side yards (15-foot street side), and 20-foot rear setback under OMC Chapter 9 (Zoning), with reductions allowed for ADUs per Government Code 65852.2.
View full Ontario rules →Rialto, CA
San Bernardino County
San Bernardino County Development Code establishes minimum yard setbacks that vary by zoning district, with typical single-family residential requiring 25 ft front, 5 ft side, and 20 ft rear.
View full Rialto rules →Key Facts Comparison
| Fact | Ontario | Rialto |
|---|---|---|
| Front yard | 20 ft minimum (typical R-1) | - |
| Side yard | 5 ft interior | - |
| Rear yard | 20 ft | - |
| ADU setback | 4 ft (GC 65852.2) | - |
| - | - |
Highlighted rows indicate differences between cities.
Ontario FAQ
Can I build up to my property line?
No, except for zero-lot-line districts or after approval of a variance through the Ontario Planning Commission.
Do ADUs follow regular setback rules?
No, ADUs get a statewide 4-foot setback under Government Code 65852.2, overriding local zoning minimums.
Rialto FAQ
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