Happy Hall School

233 Santa Inez Avenue, San Bruno, CA 94066 · San Mateo County

ClosedChild care center (preschool)

This center is closed. California lists its license as closed as of Jan 23, 2026. Its state inspection history is shown below.

Happy Hall School was a licensed child care center in San Bruno, CA, licensed for up to 143 children. Its license closed around January 2026. Since February 2021, the state inspected it 3 times and investigated 2 complaints, 1 substantiated, and issued 1 citation, 1 of them Type A. Its inspection history is kept here for reference.

Inspection history

1Type A citations

0Type B citations

3Inspections

1 of 2Complaints substantiated

Every state visit

Citation issuedNo citationTop row: inspections · bottom row: complaint investigations and other visits

What inspectors cited most

Supervision1

Citations, newest first

Type AFeb 24, 2023Complaint investigationSupervision

Care and supervision §101229(a)(1)

Responsibility for Providing Care and Supervision: No child(ren) shall be left without the supervision of a teacher at any time, except as specified in Sections 101216.2(e)(1) and 101230(c)(1). Supervision shall include visual observation. 1 Facility to come up with a plan regarding supervision of children at all times. Facility has provied an all staff training to staff after this incident on supervision issues.Copy obtained during the visit. Deficiency cleared during the visit. This requirement is not met based on information that a child (C1) was able to exit facility and found first by a legal guardian of another child, and then subsequently a staff person. This poses an immediate health and safety risk to children in care. 8

Plan of correction due Feb 27, 2023

Complaint investigations

Not substantiatedMar 23, 2023Complaint investigationreceived Mar 3, 2023

The state did not substantiate this complaint, so its allegations are not shown.

SubstantiatedFeb 24, 2023Complaint investigationreceived Dec 21, 2022

Substantiated allegation:

LACK OF SUPERVISION: Daycare child wandered outside of facility.

1 citation issued during this investigation, listed under Citations.

About this center

Licensed capacity143 children

License typeChild care center (preschool)

License statusClosed

Licensed sinceApr 23, 1994

ClosedJan 23, 2026

LicenseeHappy Hall Schools, INC.

Last administratorMichelle Marquez

State facility #410500286

Other licenses at this address

Happy Hall School
Child care center (single license, multiple age groups) · LicensedToo few inspections to compare

Licensed centers nearby

Happy Hall School
233 Santa Inez Avenue, San Bruno · under 0.1 mi away · 123 spotsToo few inspections to compare Millbrae Nursery School, INC
86 Center St., Millbrae · 0.5 mi away · 44 spotsMore citations than most Stratford School
300 El Camino Real, San Bruno · 0.5 mi away · 144 spotsAbout typical Intelligent Learning
1111 El Camino Real, Millbrae · 0.6 mi away · 30 spotsToo few inspections to compare St. Andrew's Preschool
1600 Santa Lucia Avenue, San Bruno · 0.7 mi away · 53 spotsToo few inspections to compare California Montessori School
480 N. San Anselmo Avenue, San Bruno · 0.7 mi away · 38 spotsMore citations than most

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 410500286 on the California Care Facility Search. Data refreshed Oct 2, 2026.