So Big Co-op Preschool
So Big Co-op Preschool is a licensed child care center in Antioch, CA, licensed for up to 24 children and serving preschool-age children. It has held its California license since 1975. Since February 2021, state licensing staff have inspected it 2 times. The state issued 1 citation, 0 of them Type A (the most serious). None came in the last 12 months. Measured by weighted citations per inspection, it is tied for #9 of 23 centers in Antioch and has more citations per inspection than 45% of California licensed centers.
Inspection record
Every state visit
What inspectors cited most
Citations, newest first
Based on interview, the facility did not comply with the section cited above when Director did not completed Lead Testing for facility which poses/posed a potential health, safety or personal rights risk to persons in care.
How common are lead-in-water citations in Contra Costa County? See the county-by-county report →
About this center
Common questions
Does So Big Co-op Preschool take infants?
Not under this license, which covers preschool-age children.
Has So Big Co-op Preschool had any serious violations?
No Type A citations since 2021. It has 1 Type B citation, listed above.
How does So Big Co-op Preschool compare with other daycares in Antioch?
It is tied for #9 of 23 centers in Antioch by weighted citations per inspection, and has more citations per inspection than 45% of California licensed centers with enough inspection history to compare.
When was So Big Co-op Preschool last inspected?
Jan 13, 2026. No citations were issued during that visit.
How much does So Big Co-op Preschool cost?
California does not publish individual centers’ prices, so ask So Big Co-op Preschool for its current tuition. For comparison, the median full-time price at licensed centers in Contra Costa County, which includes Antioch, was $1,287 a month for preschoolers (about $1,620 today) in the state’s 2021 Regional Market Rate Survey.
Who runs So Big Co-op Preschool?
The licensee is So Big Play Center, INC, and the administrator listed with the state is Mary Halbasch.
Licensed centers nearby
1203 West 10th Street, Antioch · under 0.1 mi away · 126 spotsToo few inspections to compareRivertown Child Development Center
915 W 4th Street, Antioch · 0.3 mi away · 24 spotsToo few inspections to compareNellie's Riverview Child Care
422 W 2nd St, Antioch · 0.6 mi away · 68 spotsToo few inspections to compareHoly Rosary School
25 East 15th Street, Antioch · 0.9 mi away · 45 spotsMore citations than mostStarlight Academy III
508 West Tregallas, Antioch · 1.0 mi away · 30 spotsNo citationsYWCA Of Contra Costa - Mary Rocha
931 Cavallo Road, Antioch · 1.3 mi away · 89 spotsNo citations
Citations are quoted from California Department of Social Services inspection and complaint reports. Type A citations are the state’s most serious category (an immediate risk to children’s health, safety or personal rights); Type B citations are a potential risk. A citation is a finding about one rule, not a judgment about a center overall. Complaint allegations appear here only when the state substantiated them.
To read the full state reports, search facility number 070200750 on the California Care Facility Search. Data refreshed Oct 3, 2026.