San Bernardino County
Filing small claims in Ontario
Help filing in Ontario: the courthouse, what to bring, and a plan for the day you present your own case.
Courthouse
Rancho Cucamonga Courthouse
8303 Haven Avenue, Rancho Cucamonga, CA 91730
Claim limits
Individuals: $12,500
Businesses: $6,250
Timeline & fees
Filing fee: $30–$75
Hearing: 30–75 days
Common Ontario disputes we prepare
Unpaid Invoices & Money Owed in Ontario
Clients, customers, or business partners who never paid. We help you document what you're owed and, when a letter is the right step, prepare one.
Learn moreSecurity Deposit Disputes in Ontario
Landlords who wrongfully withheld your deposit. California law allows up to twice the deposit in penalties for bad-faith retention.
Learn moreLandlord & Tenant Disputes in Ontario
Habitability, illegal fees, and return-of-deposit claims prepared with a mediator's eye toward what actually moves a judge.
Learn moreBreach of Contract in Ontario
Written, verbal, or implied agreements that were broken. We map your damages to the contract terms so the claim holds up.
Learn moreProperty Damage in Ontario
Auto accidents, negligence, and damage to your property — including claims an insurer underpaid or denied.
Learn moreConsumer & Refund Claims in Ontario
Defective products, undelivered goods, and services that weren't as promised — including memberships that won't cancel.
Learn moreContractor & Home-Improvement Disputes in Ontario
Unfinished, defective, or abandoned work. We organize your documentation and quantify the cost to make it right.
Learn moreBusiness-to-Business Disputes in Ontario
Vendor, client, and partner disputes — note California's lower $6,250 small claims limit for business entities.
Learn morePersonal Injury & Accidents in Ontario
Ariella has spent countless hours in court aiding on personal injury and accident disputes, for both plaintiffs and defendants.
Learn moreInsurance Claims in Ontario
Insurance claims are one of the disputes Ariella focuses on, alongside consumer protection and small claims.
Learn moreOntario small claims FAQ
Where do I file small claims in Ontario?
Ontario small claims cases are handled at the Rancho Cucamonga Courthouse, 8303 Haven Avenue, Rancho Cucamonga, CA 91730. We confirm the correct courthouse and division for your case.
How much does it cost to file in Ontario?
Court filing fees are $30–$75 depending on the amount you're claiming.
How do I serve the defendant in Ontario?
In California you cannot serve the defendant yourself. Use the sheriff, a registered process server, or certified mail sent by the court clerk.
How long does a Ontario small claims case take?
Most cases are heard typically 30–75 days from filing to hearing.
Can I bring a lawyer to the hearing?
No — California small claims hearings are for self-represented parties (CCP §116.530). We prepare everything beforehand so you present a strong, organized case yourself.
More San Bernardino County cities
Filing in Ontario?
Need help? Don't know what first steps to take? Give us a call — if nothing else, we'd be happy to give you a complimentary push in the right direction.