Mountainside School

Center · Unincorporated King County · 23912 SE Tiger Mt Rd

What kind of place is this?

Size 74 children licensed In the middle half for Seattle centers, where the middle half licenses 43–121. Measured across 576 Seattle centers, 2026-08-17.
Established 1980
Approach play-based

In the program’s own words

“combining the best of many different learning styles and ideas including the power of play, creativity, hands-on learning and more” mountainsideschool.com, July 2026

How this compares

Washington DCYF cited something at 4 of the 4 visits below. Across Seattle centers it cites something at about 67% of visits. Each state decides what gets written up, so this compares Seattle with Seattle and never with another state.

Who will be with our child?

Will it fit our family?

Ages served 6 weeks to 6 years
Hours 7:00 AM – 5:30 PM
Days / week 5

What will it cost us?

This provider does not publish pricing.

What Shortlist has verified

License status Active

State record — Washington DCYF

Last visit
July 22, 2026
On file
4 visits since July 2023 — all of them cited findings · 1 complaint investigation
Fixed?
Washington DCYF does not publish whether a finding was corrected.
Most serious
SeriousThere is a gate in the infant room that is blocking the exit path and requires special knowledge to open. · February 24, 2026

Washington DCYF publishes the licensor’s own observation and a risk level for every citation it issues at a licensing visit, with the inspection report attached as a PDF.

Jul 2026 Licensing visit 1 finding

Licensing visit · July 22, 2026

Sleep, rest, and equipment

WAC 110-300-0265(6)(a) · Short Term

Some of the mats in the Early Preschool room have tears on them.

Report (PDF)

Feb 2026 Licensing visit 1 finding

Licensing visit · February 24, 2026

Emergency preparation and exiting

WAC 110-300-0166(3)(c) · Serious

There is a gate in the infant room that is blocking the exit path and requires special knowledge to open.

Report (PDF)

Jan 2025 Complaint 1 valid issue

Complaint · January 17, 2025 · Resolved March 18, 2025

The state lists this complaint on the provider’s record, but the state’s published report includes no citation detail.

Report (PDF)

Aug 2024 Licensing visit 3 findings

Licensing visit · August 19, 2024

Training requirements

WAC 110-300-0106(8) · Short Term

There are staff missing their safe sleep training: K.A., K.M. and J.O.

Food allergies and special dietary needs

WAC 110-300-0186(2) · Serious

No documentation that teachers have been trained on the medication.

Emergency preparation and exiting

WAC 110-300-0166(3)(c) · Serious

There is a gate in the infant room that is blocking the exit and needs special knowledge to open.

Individual employees are shown by initials. The state’s report, linked above, names them in full.

Report (PDF)

Jul 2023 Licensing visit 2 findings

Licensing visit · July 31, 2023

Medication

WAC 110-300-0215(3)(a)(i) · Serious · No longer displayed by the state

The child's epi-pen in the preschool room was expired.

Equipment and surfaces in outdoor early learning space

WAC 110-300-0146(4) · Serious · No longer displayed by the state

There is a tramboline in the early preschool classroom.

Report (PDF)

Before you tour

Mountainside School hasn’t published

Cost, a typical day.

Ask what changed after the five findings Washington DCYF ranked Serious, most recently in February 2026.It does not publish whether a finding was fixed. The rest carry its lower risk levels.

Sources and dates

Where every fact on this page came from, and when Shortlist last checked it against that source. Anything Shortlist could not source is named here rather than left blank.

What kind of place is this

Who will be with our child

Not yet reported: children per teacher.

Will it fit our family

Not yet reported: schedule, holiday closures.

Licensing and contact

State record

Every state visit and complaint on file, shown in full and never edited. Open a date to read what the state wrote.

Do you run Mountainside School? Shortlist has no tuition, hours or ratios for it, because the state does not publish that. Add what is missing. It is free and takes about ten minutes.