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Keystone Montessori School

6639 Blake Street, El Cerrito, CA 94530
licensed capacity
57
open each week
5 days
a week, county median
$482
year first licensed
2019
Call (510) 709-5853WebsiteDirections

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Licensed by the stateInspection record

About

About Keystone Montessori School

Keystone Montessori School is a licensed child care center in El Cerrito, California. The state has licensed it since September 23, 2019, for up to 57 children.

It is open Monday to Friday, 8:00 AM to 5:45 PM. It describes a Montessori approach, with preschool and toddler care.

California Department of Social Services, Community Care Licensing Division lists 12 visits since Sep 2021, with 1 Type A and 4 Type B citations.

Montessori
Ask when you call: rates, current openings, staff-to-child ratio and whether it accepts child care subsidies.
Type
Child care center
Ages
18 months to 6 years
Hours today
Closed today
Licensed capacity
57 children

Hours

Hours

Monday8:00 AM to 5:45 PM
Tuesday8:00 AM to 5:45 PM
Wednesday8:00 AM to 5:45 PM
Thursday8:00 AM to 5:45 PM
Friday8:00 AM to 5:45 PM
SaturdayNot listed
SundayTodayNot listed

Programs

Programs and care

Ages18 months to 6 years
ProgramsPreschool and toddler care
ApproachMontessori
EnrichmentLanguage classes, music class, dance parties
StaffMontessori-trained professionals
Daily lifePotty training: Teaches toilet training
SafetyOutdoor playground
Licensed capacity57 childrenFrom the state license
A daycare without an item may still offer it; ask.

Cost

Tuition and costs

Keystone Montessori School has not listed its tuition. For comparison, full-time infant care at a child care center in Contra Costa County has a median price of $482 a week (U.S. Department of Labor, 2022).

Ask the daycare for its ratesIt has not listed its tuition. The county medians below are a starting point.
Contra Costa County medians, full time, per week

Infant

Center$482
Home daycare$319

Toddler

Center$346
Home daycare$288

Preschool

Center$381
Home daycare$320

School age

Center$429
Home daycare$264

County median full-time prices at centers and home daycares, U.S. Department of Labor, National Database of Childcare Prices, 2022 (the latest year). Not this daycare's rates; prices have risen since.

State record

Inspection reports for Keystone Montessori School

California Department of Social Services, Community Care Licensing Division lists 12 visits to Keystone Montessori School since Sep 2021. Its published counts show 1 Type A and 4 Type B citations across those visits.

License

Status
Licensed and operating
License type
Child care center
Capacity
57 children
First licensed
2019
License number
#073408869
See the state's record

Summary

12 visits since Sep 2021 · Last visit Jul 31, 2026

Type A citations 1 · Type B citations 4, as the state counts them

A cited rule is what an inspector found on the day of a visit. It is not a rating of the daycare today.

Own this daycare? Add your response to the state record

See all 12 visits
  1. Jul 31, 2026Visit
  2. Jul 25, 2025Visit
  3. Apr 15, 2025Visit
  4. Aug 14, 2024Visit
  5. Dec 13, 2023Inspection
  6. Aug 25, 2023Complaint investigationType A 1 · Type B 0
  7. Jul 5, 2023Visit
  8. May 24, 2023Visit
  9. Sep 9, 2022Complaint investigationType A 0 · Type B 1
  10. Jun 29, 2022Inspection
Show 2 earlier visits
  1. Oct 19, 2021Complaint investigationType A 0 · Type B 0
  2. Sep 28, 2021Inspection

California Department of Social Services, Community Care Licensing Division publishes how many Type A and Type B citations each visit produced, not the rule text. The state defines Type A as a violation that is an immediate risk to children's health, safety or personal rights, and Type B as one that could become an immediate risk if not corrected.

Copied from California Department of Social Services, Community Care Licensing Division on October 1, 2026; the state's records start around Jan 2021. Rule wording, severity and dates are the state's.

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FAQ

Questions about Keystone Montessori School

Is Keystone Montessori School licensed?

Yes. California Department of Social Services, Community Care Licensing Division lists it as licensed and operating, first licensed September 23, 2019.

Does Keystone Montessori School have inspection violations?

California Department of Social Services, Community Care Licensing Division lists 12 visits to Keystone Montessori School since Sep 2021. Its published counts show 1 Type A and 4 Type B citations across those visits.

How many children can Keystone Montessori School care for?

57, the licensed capacity on the state record.

What are Keystone Montessori School's hours?

Monday to Friday, 8:00 AM to 5:45 PM. Holiday hours can differ.

How much does Keystone Montessori School cost?

It has not listed its tuition. Call (510) 709-5853 to ask.

What is Keystone Montessori School's phone number?

(510) 709-5853.

Where is Keystone Montessori School?

6639 Blake Street, El Cerrito, CA 94530. The nearest other daycare we list is St. John the Baptist Catholic Preschool, 0.3 miles away.

Sources: California Department of Social Services, Community Care Licensing Division (license and visits) · U.S. Department of Labor, 2022 (county prices).