Ontario, CA Noise Ordinances: Construction Hours (2026)
Construction hours in Ontario, CA, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Code Section
- OMC 5-29.09 (Construction activity noise)
- Weekday hours
- 7:00 a.m. to 6:00 p.m.
- Weekend hours
- 9:00 a.m. to 6:00 p.m. (Sat and Sun)
- Emergency exception
- Authorized by City Manager or designee
Summary
Ontario Municipal Code section 5-29.09 limits noise-producing construction, remodeling, grading and demolition to 7:00 a.m. to 6:00 p.m. on weekdays and 9:00 a.m. to 6:00 p.m. on Saturday and Sunday, unless the activity complies with the dB limits in section 5-29.04 or 5-29.05.
(a) No person, while engaged in construction, remodeling, digging, grading, demolition or any other related building activity, shall operate any tool, equipment or machine in a manner that produces loud noise that disturbs a person of normal sensitivity who works or resides in the vicinity, or a Police or Code Enforcement Officer, on any weekday except between the hours of 7:00 a.m. and 6:00 p.m. or on Saturday or Sunday between the hours of 9:00 a.m. and 6:00 p.m.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-32: Current through Ordinance 3338, passed 7-21-2026).
Full Breakdown
OMC section 5-29.09(a) provides that no person engaged in construction, remodeling, digging, grading, demolition or related building activity shall operate any tool, equipment or machine in a manner that produces loud noise disturbing a person of normal sensitivity in the vicinity, or an officer, on any weekday except between 7:00 a.m. and 6:00 p.m., or on Saturday or Sunday between 9:00 a.m. and 6:00 p.m. Landowners, contractors and employers are equally barred from allowing crews to violate these hours (subsection (b)). Exceptions exist for emergency construction authorized by the City Manager, certain public-works projects, and any construction that complies with the noise limits in sections 5-29.04 or 5-29.05. Construction noise is expressly carved out of the general Chapter 29 standards by the exemption in section 5-29.06(d) and routed to this section.
Violations & Fines
Construction outside permitted hours is an infraction under section 5-29.17 punishable by a fine under OMC section 1-2.01, with each day a separate offense; administrative citations (OMC 1-5.04) and nuisance abatement are also available.
Frequently Asked Questions
Can construction happen on Sundays in Ontario?
Are there exceptions to the construction hours?
Sources & Official References
Other rules in Ontario
How Ontario compares: Cities with the Strictest Construction Hours·California rules heatmap·Compare Ontario to another location·View the California noise ordinances overview
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Construction Hours in Nearby Cities
How other cities in San Bernardino County handle construction hours.