Construction Hours: Rialto vs San Bernardino
How do construction hours rules compare between Rialto, CA and San Bernardino, CA?
Rialto and San Bernardino have similar restriction levels.
Rialto, CA
San Bernardino County
RMC §9.50.070 sets seasonal construction hours. Summer (May 1–Sep 30): Mon–Fri 6 a.m.–7 p.m., Sat 8 a.m.–5 p.m. Winter (Oct 1–Apr 30): Mon–Fri 7 a.m.–5:30 p.m., Sat 8 a.m.–5 p.m. No construction on Sundays or state holidays in either season.
View full Rialto rules →San Bernardino, CA
San Bernardino County
Construction is permitted 7 AM to 7 PM Monday through Saturday in San Bernardino. No construction on Sundays or federal holidays. Early starts are common because of Inland Empire summer heat.
View full San Bernardino rules →Key Facts Comparison
| Fact | Rialto | San Bernardino |
|---|---|---|
| Summer weekday hours (May 1–Sep 30) | 6:00 a.m. – 7:00 p.m. (RMC §9.50.070(B)(2)) | - |
| Winter weekday hours (Oct 1–Apr 30) | 7:00 a.m. – 5:30 p.m. (RMC §9.50.070(B)(1)) | - |
| Saturday hours (year-round) | 8:00 a.m. – 5:00 p.m. | - |
| Sunday / state holidays | No permissible construction hours | - |
| Early-start exception | Written 'early work permit' from City Manager required (§9.50.070(D)(2)) | - |
| Weekday Hours | - | 7 AM to 7 PM, Mon to Sat |
| Sunday and Holidays | - | Prohibited without special permit |
| Enforcement | - | Code Enforcement and Police |
| Phone | - | 909-384-5122 |
Highlighted rows indicate differences between cities.
Rialto FAQ
Can a contractor start at 6 a.m. in Rialto?
Only from May 1 through September 30. Outside that summer window (October 1–April 30) the earliest weekday start is 7:00 a.m. on Monday–Friday and 8:00 a.m. on Saturday under RMC §9.50.070(B)(1).
Is Sunday construction ever allowed?
No. RMC §9.50.070(B) lists 'No permissible hours' for Sundays and California state holidays in both seasons. The only exceptions are an actual emergency repair (§9.50.070(D)(1)) or work under a written early-work permit from the City Manager (§9.50.070(D)(2)).
Does the construction-hour rule apply to me doing my own home improvement?
Yes. §9.50.070(A) reaches any work of 'construction, erection, alteration, repair, addition, movement, demolition, or improvement to any building or structure' — DIY homeowners are covered. Domestic power tools used in garages or workshops are separately restricted to 7 a.m.–8 p.m. under §9.50.050(C).
San Bernardino FAQ
Can contractors work on Sunday?
No. Sunday and federal holiday construction is prohibited except under special permit for emergency or critical infrastructure work.
Why do crews start so early?
Inland Empire summer heat often exceeds 100 degrees, so contractors use the 7 AM start to protect workers under Cal/OSHA heat-illness rules.
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