Unincorporated King County · Licensed center
Happy Hearts Montessori
At a glance
- Medium center, licensed for 64 children.
- Hours 8:30 a.m. to 3:30 p.m., 5 days a week, school year.
- Tuition $1,660 a month, full time; the age it is for isn’t stated. See costs
What to know
The license is the range the state allows. It does not say which ages have openings.
What the state has found
The state cited rules at 2 of its 3 licensing inspections since March 2024. It lists no valid complaint about this center.
See each inspection
Licensing inspections
Mar 16, 20262 citations
Food allergies and special dietary needsSerious. Fix within 5 business days. The licensor rechecks within 10.
“Licensor observed that the provider did not have an EpiPen that was required in a child's Individual Care Plan.”
WAC 110-300-0186(2)
Child recordsShort Term. Fix within 10 business days. Rechecked within 15.
“Licensor observed that a child's file was missing the address and phone number of their emergency dental and primary care provider.”
WAC 110-300-0460(3)
- May 7, 2025Nothing cited
Mar 20, 20242 citations
Safety requirementsSerious. Fix within 5 business days. The licensor rechecks within 10.
“Licensor observed a rolled up wifi cord accessible to children. 0165 (2d) Licensor observed plastic bags with draw string straps used to store sleep mats were laid on the floor accessible to children while staff prepared children for nap time. 0165 (5e) Licensor observed a surge protector was accessible to children. 0165 (5f) Licensor observed a power surge with extension cord was accessible to children.”
WAC 110-300-0165(2)(d)
Storage of hazardous and maintenance suppliesSerious. Fix within 5 business days. The licensor rechecks within 10.
“Licensor observed garden tools in one outdoor play area accessible to children.”
WAC 110-300-0260(5)
The state cited rules at 2 of this center's 3 inspections. Seattle-area centers inspected 3 times split about evenly: about a third had fewer, a third the same, and a third more (364 centers).
How all 364 Seattle-area centers inspected 3 times compare
Of the 364 Seattle-area centers the state inspected 3 times, how many of those inspections cited a rule:
- None12%
- 1 of 321%
- 2 of 335%This center
- All 333%
Read every record and the state’s reports
State record — Washington DCYF
- Last visit
- March 16, 2026
- On file
- 3 visits since March 2024 — 1 cited nothing
- Most serious
- Serious —
Licensor observed that the provider did not have an EpiPen that was required in a child's Individual Care Plan.
· March 16, 2026
Washington DCYF publishes each citation in the licensor’s own words, with a risk level.
Mar 2026 Licensing visit 2 findings
Licensing visit · March 16, 2026
Food allergies and special dietary needs
WAC 110-300-0186(2) · Serious
Licensor observed that the provider did not have an EpiPen that was required in a child's Individual Care Plan.
WAC 110-300-0460(3) · Short Term
Licensor observed that a child's file was missing the address and phone number of their emergency dental and primary care provider.
Mar 2024 Licensing visit 2 findings
Licensing visit · March 20, 2024
WAC 110-300-0165(2)(d) · Serious
Licensor observed a rolled up wifi cord accessible to children. 0165 (2d) Licensor observed plastic bags with draw string straps used to store sleep mats were laid on the floor accessible to children while staff prepared children for nap time. 0165 (5e) Licensor observed a surge protector was accessible to children. 0165 (5f) Licensor observed a power surge with extension cord was accessible to children.
Storage of hazardous and maintenance supplies
WAC 110-300-0260(5) · Serious
Licensor observed garden tools in one outdoor play area accessible to children.
Shortlist replaces people’s names in the state’s text with initials. This is done by rule, not by hand, so it can miss a name or shorten a word that isn’t one. The state’s report, linked on each row, has the original.
What it costs
From $1,660 a month
Seattle-area comparison hidden until they say which age this price is for.
- Half day
- $1,100 a month
- Application fee
- $550
- Siblings
- 10% tuition discount for younger siblings
A day here
8:30 a.m. to 3:30 p.m., 5 days a week, school year
Meals, updates for parents and schedule
- Meals
- Full-service lunch and snack included in tuition
- Updates for parents
- Parents/pick-up family members must have a classroom app installed on their phones
- Schedule
- Full-day, half-day
Policies
- When a child is sick
- Keep home with fever over 100 degrees, vomiting or diarrhea in the prior 24 hours; fever-free without medicine for 48 hours before returning; 24 hours on antibiotics before returning
- Enrollment
- Withdrawal requires 60 days' written notice; tuition owed through the notice period; enrollment may be suspended/denied if account is delinquent beyond 30 days
Details
- Phone
- (253) 802-6657
- Address
- 23855 SE 216th St, Unincorporated King County, 98038
- License
- PL-19279
- Quality program
- Early Achievers Enrolled
We couldn’t find some information that may matter to your decision: openings, Working Connections subsidy, teaching approach, ratios and staff, and who owns it. We can ask the program for you and copy you in.
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 it costs
- Monthly tuition, Second price, Application fee, Sibling discount — Checked September 2026 happyheartsmontessori.com/…/2b66ae_a813623d5e8c4502ab81ee5c0073da2b.pdf
State record
From Washington DCYF’s published reports, last checked November 3, 2026.
Washington’s four risk levels, highest first: Immediate, Serious, Short Term, Long Term. Deadlines from DCYF procedure PRO 10.1.21.
Ages
A day here
- Meals, Hours, Calendar, Schedule — Checked September 2026 happyheartsmontessori.com/…/2b66ae_a813623d5e8c4502ab81ee5c0073da2b.pdf
- Updates for parents — Checked July 2026 happyheartsmontessori.com/…/2b66ae_cc77b29263704122bf91c6ed3714342f.pdf
Policies
- When a child is sick — Checked July 2026 happyheartsmontessori.com/…/2b66ae_cc77b29263704122bf91c6ed3714342f.pdf
- Enrollment — Checked August 2026 happyheartsmontessori.com/…/2b66ae_cc77b29263704122bf91c6ed3714342f.pdf
Details
- Phone, Ages on the license — Checked September 2026 findchildcarewa.org
- Website — Checked July 2026 happyheartsmontessori.com
- Address, License — Checked June 2026 data.wa.gov
- Quality program — Checked April 2026 data.wa.gov
- Ages they serve — Checked September 2026 happyheartsmontessori.com/…/2b66ae_a813623d5e8c4502ab81ee5c0073da2b.pdf
Medium means the middle half of Seattle-area’s 855 licensed centers by state-licensed capacity: 41 to 115 children. Small is 6 to 40; large is 116 to 323.
The ages on the license are what the state licenses it to care for, which can be wider than the ages it takes.