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Building Permit in Ontario, California

Ontario's Building Department works out of City Hall on East B Street and keeps a five-day counter. The catch is not which days it opens but two recurring windows inside the week when the counter is shut while the doors are open.

Verified 2026-09-19 · Source

When you need this permit

  • The counter is open Monday to Friday, but is closed "for staff meetings every Tuesday from 7:30-9:00 am and the first Thursday of every month from 8:00-10:00 am".
  • NO ITEMISED SUBMITTAL CHECKLIST was published on the page read for this record, so none is reproduced here.

Required documents

Check off what you have — your progress is saved on this device.

Fee schedule

Building Department feesThe department links a "Building Department Fees" resource, which was not opened for this record. No schedule, valuation table or minimum figure is asserted here.
NOT PUBLISHED on the pages read for this record.

Review timeline

Plan review
Not published — contact the department

How long did your Building Permit permit actually take in Ontario?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Contact the Building Department

    The department publishes (909) 395-2023 and buildingcounter@ontarioca.gov. No separate inspection line, booking portal, advance-notice requirement or daily cut-off was published on the page read, so none is asserted here.

Tips

  • DO NOT ARRIVE AT OPENING ON A TUESDAY: the counter is closed for staff meetings "every Tuesday from 7:30-9:00 am", which is the first ninety minutes of the day.
  • THE FIRST THURSDAY OF THE MONTH HAS ITS OWN CLOSURE, 8:00-10:00 am - a different window from the Tuesday one, and easy to conflate.

Frequently asked questions

Ontario requires a building permit for: The counter is open Monday to Friday, but is closed "for staff meetings every Tuesday from 7:30-9:00 am and the first Thursday of every month from 8:00-10:00 am".; NO ITEMISED SUBMITTAL CHECKLIST was published on the page read for this record, so none is reproduced here.. If your project isn't listed, confirm with City of Ontario Building Department at (909) 395-2023 before starting work.

In Ontario, the published Building Department fees is: NOT PUBLISHED on the pages read for this record.. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Ontario does not publish a plan-review timeline for this permit. Contact City of Ontario Building Department at (909) 395-2023 for current turnaround.

Depending on your project, Ontario may also ask for: . See the required-documents checklist on this page for details on each.

Apply through City of Ontario Building Department at City Hall, 303 East B Street, Ontario, CA 91764. Phone: (909) 395-2023, email: buildingcounter@ontarioca.gov. Office hours: "Monday - Thursday : 7:30 AM-5:30 PM", "Friday : 8:00 AM-5:00 PM" - a genuine five-day counter, which is uncommon among the California cities in this corpus. BUT IT SHUTS TWICE ON A RECURRING SCHEDULE INSIDE THOSE HOURS: "The Building Counter is closed for staff meetings every Tuesday from 7:30-9:00 am and the first Thursday of every month from 8:00-10:00 am".. Official information: https://www.ontarioca.gov/government/community-development/building.

Yes - "Monday - Thursday : 7:30 AM-5:30 PM" and "Friday : 8:00 AM-5:00 PM". That is unusual among the California counters in this corpus, several of which close on Fridays or alternate them.

Yes, twice on a recurring schedule: "The Building Counter is closed for staff meetings every Tuesday from 7:30-9:00 am and the first Thursday of every month from 8:00-10:00 am." Both fall at the start of the day, when someone arriving at opening time would expect service.

buildingcounter@ontarioca.gov, published in the department page's source alongside the counter phone number (909) 395-2023.

Sources & verification

Verified against official sources. Last reviewed 2026-09-19.

Checklists & handouts

Codes & ordinances

Department & other records

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Ontario building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Ontario's permit history isn't searchable here yet

This page covers what the permit requires. What we don't have for Ontario yet is the record of permits actually issued — the history you'd search by street address. That is a gap in our coverage, not a statement about any particular property.

Your email, and the place — never an address. We only use it to tell you when Ontario lands. Privacy.

Building Permit in other cities

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