Licensed Child Care Centre
Upper Canada Child Care At St. John Xxiii Ces
125 Kreighoff Avenue, Unionville
0.1 km
Before & after school
Operator: Upper Canada Creative Child Care Centres Of Ontario
Licence #0003955·Child Care Centre
Catholic Elementary · Markham
Homes for Sale in the St John XXIII Catholic Elementary School Boundary
125 Kreighoff Ave, Unionville, Ontario, L3R1V8 · York CDSB
There are currently 140 homes for sale and 85 rentals inside the St John XXIII Catholic Elementary School attendance boundary. The median asking price for active homes is $784K and the median asking rent is $2,700/month. Most homes for sale are condo apartments. The median time on market for homes for sale is 38 days. Updated October 23, 2026.
Also written as St. John XXIII Catholic Elementary School · Saint John XXIII Catholic Elementary School
St John XXIII Catholic Elementary School is a York CDSB Catholic elementary school in Markham, serving JK-8. Homes in its catchment sit in Unionville and Village Green-South Unionville. Every home shown below falls inside the York CDSB-published attendance boundary — the same boundary the school board uses for enrolment.
Est. 1972
ProgramsFrench ImmersionRegular Track
- 71%
- EQAO composite
- JK-8
- Grades
- 290
- Students
- English
- Language
−11 pts vs Markham · −6 pts vs York CDSB — higher than 5 of the 72 other Markham elementary schools with published results
In 2024–25, Grade 3 reading and writing results were below the Ontario average, while mathematics was above it; Grade 6 mathematics results were above the Ontario average, while writing was close to it and reading was below it. Compared with the school's own results from 2018-19 to 2024-25, Grade 3 reading (−50 points), Grade 3 writing (−24 points), Grade 6 reading (−19 points), Grade 6 writing (−13 points) and Grade 6 mathematics (−13 points) fell; Grade 3 mathematics (+10 points) rose.
Source: EQAO 2024–25 results as published by the Ministry of Education. Each figure is the share of students meeting the provincial standard; "above" or "below" means more than 3 percentage points from the Ontario figure for the same assessment. These describe a cohort of students, not any individual, and are not a ranking.
Grade 3Reading 50%Writing 56%Math 86%
Grade 6Reading 81%Writing 87%Math 68%
View all EQAO results (2024–2025)
Grade 3
Reading
50%
Markham elementary avg: 79%
Grade 3
Writing
56%
Markham elementary avg: 74%
Grade 3
Mathematics
86%
Markham elementary avg: 77%
Up 15 points since 2022–23
Grade 6
Reading
81%
Markham elementary avg: 93%
Down 15 points since 2022–23
Grade 6
Writing
87%
Markham elementary avg: 93%
Down 5 points since 2022–23
Grade 6
Mathematics
68%
Markham elementary avg: 73%
Down 5 points since 2022–23
Three-year change is published by the Ministry of Education: the difference in percentage points between the 2024–2025 and 2022–2023 assessments. Each assessment is written by a different group of students, and at a school this size a single grade is a few dozen students, so a few points can reflect who wrote it rather than a change at the school. EQAO does not report a result where fewer than 10 students wrote.
Six years of results
Every year the Ministry of Education has published for St John XXIII Catholic Elementary School, oldest first. Each year is a different group of students.
Grade 3 Reading50%
Grade 3 Writing56%
Grade 3 Mathematics86%
Grade 6 Reading81%
Grade 6 Writing87%
Grade 6 Mathematics68%
| Assessment | 2017-18 | 2018-19 | 2019-20 — no provincial assessment | 2020-21 — no provincial assessment | 2021-22 | 2022-23 | 2023-24 | 2024-25 |
|---|---|---|---|---|---|---|---|---|
| Grade 3 Reading | no result published | 100% | no assessment | no assessment | 40% | no result published | no result published | 50% |
| Grade 3 Writing | no result published | 80% | no assessment | no assessment | 40% | no result published | no result published | 56% |
| Grade 3 Mathematics | 63% | 96% | no assessment | no assessment | 76% | 71% | 81% | 86% |
| Grade 6 Reading | 95% | 94% | no assessment | no assessment | 100% | 96% | 90% | 81% |
| Grade 6 Writing | 95% | 88% | no assessment | no assessment | 100% | 92% | 90% | 87% |
| Grade 6 Mathematics | 70% | 81% | no assessment | no assessment | 81% | 73% | 69% | 68% |
Results are the percentage of students who met or exceeded the provincial standard, as published by the Ministry of Education. A dash means no result was published for that year: EQAO does not report a result where fewer than 10 students wrote. No provincial assessment ran in 2019-20 or 2020-21, so those years are blank for every school and are never joined across.
Informational — not a ranking.
All Markham catchments →85 homes for rent in the St John XXIII Catholic Elementary School catchment →
Is an address zoned for this school?
Check any address against St John XXIII Catholic Elementary School’s attendance boundary.
Homes currently for sale inside this school boundary
Every home below is for sale and sits inside St John XXIII Catholic Elementary School's mapped attendance boundary as published by York CDSB. Being inside a boundary does not guarantee admission or enrolment — boundaries are reviewed and can change, and placement is confirmed by the school board.
2nd most homes for sale of Markham's 69 ranked elementary catchments · median asking 62nd-highest of 64 published · Full Markham catchment league
140 homes · median $784K · 38 days on market
Buying in the St John XXIII Catholic Elementary School catchment?
Tell us your budget and must-haves — a local agent will send you homes for sale inside this boundary and help set up viewings. No obligation.
Other elementary boundaries in Markham
Other Markham attendance boundaries at a comparable price point, and the homes for sale inside each.
- Johnsview Village Public School19 for sale · $759K median· lower median
- Stornoway Crescent Public School17 for sale · $669K median· lower median
- Wismer Public School26 for sale · $792K median
- St Rene Goupil-St Luke Catholic Elementary School144 for sale · $794K median· more listings
- Cedarwood Public School11 for sale · $799K median
The market inside this boundary
16 new in the last 7 days22 with a recorded price cut (16% of 140) · median cut $40K
| Type | For sale | Median asking | Median DOM |
|---|---|---|---|
| Detached | 36 | $2.2M | 27 days |
| Semi-detached | 2 | — | — |
| Townhouse | 13 | $1.4M | 38 days |
| Condo apartment | 90 | $625K | 39 days |
Active MLS® listings zoned inside St John XXIII Catholic Elementary School’s board-published regular-track boundary — matched per listing to the polygon, not by distance. Asking (list) prices, never sold prices; days on market count from each listing’s source date; “new” means listed within 7 days. A price cut is counted only when the reduction was observed while the listing was on DistrictIQ’s feed — a floor, not a census — and increases never count. Medians are blank below 5 listings. Boundaries as published by the board for the 2026-27 school year. DistrictIQ last downloaded it 2026-08-29. Listings refresh continuously.
See all 140 homes for sale in this catchment →
New homes appear inside this boundary most weeks.Get an email when one is listed
The rental market inside this boundary
24 new in the last 7 days
| Type | For rent | Median asking rent | Median DOM |
|---|---|---|---|
| Detached | 11 | $4,300 | 39 days |
| Townhouse | 8 | $4,290 | 25 days |
| Condo apartment | 65 | $2,600 | 16 days |
Active MLS® rental listings zoned inside St John XXIII Catholic Elementary School’s board-published regular-track boundary — matched per listing to the polygon, not by distance. Asking (list) rents, never negotiated rents; days on market count from each listing’s source date; “new” means listed within 7 days. Medians are blank below 5 rentals. Boundaries as published by the board for the 2026-27 school year. DistrictIQ last downloaded it 2026-08-29. Listings refresh continuously.
All 85 homes for rent in this catchment
New homes appear inside this boundary most weeks.Get an email when one is listed
Development activity inside this school boundary
146 current development applications of any type, including commercial and industrial, inside the St John XXIII Catholic Elementary School attendance boundary (203 on record, including historical and closed files). The municipality does not publish unit counts for these applications. 75 of them have municipal activity recorded in the last five years; the other 71 are still listed as open with older or no published activity.
- Onepiece Ideal (MS) Development Inc. c/o Evans Planning Inc. (Adam Layton)Rezoning · Under review
- Scardred Company Limited - 2124123 Ontario Ltd. - Phase 2Site plan · Clearing conditions
- 11 Gainsville AvenueDevelopment application · Under review
Municipal planning applications whose site is inside the boundary, as published by Markham; matched 2026-09-25. “Current” means the municipal process is still open (however long ago it was filed), or an approved file with municipal activity in the last five years. A planning application is not a school-board decision and does not itself change an attendance boundary. All Markham development applications.
Communities in This Catchment
Location & Attendance Boundary
St John XXIII Catholic Elementary School attendance boundary· Boundaries can change — confirm with York CDSB.Open interactive map →
- Address
- 125 Kreighoff Ave, Unionville, Ontario, L3R1V8
- Phone
- 905-477-3288
- Website
- j23.ycdsb.ca
Property profiles in this catchment18 addresses
Address-level school zoning and neighbourhood data, available whether or not the home is listed.
- 5A Lunar Crescent
- 18 Bridleford Court
- 35 Cachet Parkway
- 101 Cathedral High Street #329 · 329
- 33 Cox Boulevard #1619 · 1619
- 2946 Elgin Mills Road
- 80 Eyer Drive
- 3 Ferndell Circle
- 12 McClary's Way
- 81 Prince Of Wales Drive
- 10 Rouge Valley Drive W #1215 · 1215
- 27 The Fairways Street
- 151 Upper Duke Crescent #305 · 305
- 18 Uptown Drive #229 · 229
- 1 Uptown Drive #605 · 605
- 1 Uptown Drive #910 · 910
- 292 Verdale Crossing #1716 · 1716
- 92 William Shearn Crescent
A sample of the addresses in this catchment with a property profile.
Licensed childcare nearby6 centres
Licensed centres closest to St John XXIII Catholic Elementary School — CWELCC status shown when it's published by the local service system manager.
6 licensed childcare centres nearby
Source: Ontario Ministry of Education licensed childcare data · Open Government Licence – Ontario · Last updated May 31, 2026
Getting to school: transportation is arranged by Student Transportation Services of York Region
Walk-distance rule (York CDSB): JK–Grade 3: 1.2 km; Grades 4–8: 1.6 km; Grades 9–12: 4.8 km (3.2 km where there is no public transit). Distances are measured by the consortium along walking routes, not in a straight line.
York Region DSB secondary students whose address is served by public transit (within 1.2 km of a stop, at most 3 transfers, 75 minutes or less) do not receive a school bus.
Since January 2026 cancellations are decided for two service areas: Georgina (north of and including Ravenshoe Road) and the rest of the region.
Check eligibility for an address (official Student Transportation Services of York Region tool) · Delays and cancellations · Eligibility policy
Routes, stops and times are assigned per student and change during the year; DistrictIQ does not publish them. Confirm transportation for St John XXIII Catholic Elementary School with Student Transportation Services of York Region. Facts checked 2026-09-24.
Compare Nearby Schools
The closest elementary schools by distance.
6 schools nearby
View all schools →Common questions
What is the St John XXIII Catholic Elementary School catchment?
The St John XXIII Catholic Elementary School catchment — also called its attendance boundary — is the area of addresses zoned for St John XXIII Catholic Elementary School by York CDSB. DistrictIQ maps the board-published boundary so you can check any address and browse the homes for sale inside it.
How do I check whether an address is zoned for St John XXIII Catholic Elementary School?
Enter the address in the boundary checker on this page — it tests the point against York CDSB's published attendance boundary for St John XXIII Catholic Elementary School and tells you whether the address is zoned for it. To check every school an address is zoned for at once, find your school by address. Always confirm current zoning with York CDSB before you buy or rent.
What grades does St John XXIII Catholic Elementary School serve?
St John XXIII Catholic Elementary School serves JK-8 (elementary). It is part of York CDSB.
Does St John XXIII Catholic Elementary School offer French Immersion or other program tracks?
St John XXIII Catholic Elementary School offers French Immersion and Regular Track. Program catchments can differ from the regular attendance boundary — confirm eligibility directly with York CDSB.
How many homes are for sale in St John XXIII Catholic Elementary School's catchment?
As of the latest listing sync there are 140 homes for sale and 85 homes for lease in St John XXIII Catholic Elementary School's catchment, with a median asking price of $784K. These are homes zoned for St John XXIII Catholic Elementary School, inside its attendance boundary — use the explorer above to switch between homes for sale and for lease.
Are homes available to rent in St John XXIII Catholic Elementary School's catchment?
Yes — 85 homes are currently listed for rent inside St John XXIII Catholic Elementary School's attendance boundary. Listings refresh continuously; every rental inside the boundary is on the school's rentals page.
Can school catchments change?
Yes. School boards periodically run boundary (accommodation) reviews and can redraw catchments as enrolment shifts or new schools open. DistrictIQ reflects York CDSB's current published boundary, but always confirm zoning directly with the board before making a purchase decision. How Ontario attendance boundaries work
Does living in St John XXIII Catholic Elementary School's catchment guarantee a spot?
Not automatically. Falling inside the attendance boundary is the basis for enrolment, but it is not an absolute guarantee — placement still depends on school capacity, program availability such as French Immersion, and board policy. Always confirm current school boundaries and registration directly with York CDSB.
Alert me when a home is listed in this boundary
See what's for sale inside St John XXIII Catholic Elementary School's attendance boundary — email only, no sales calls.
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Keep exploring
Keep researching around St John XXIII Catholic Elementary School — homes, communities and the wider Markham market.
Sources & methodology for this page
- School name, board, grades, enrolment, address and contact
- Ontario Ministry of Education — public school contact information and school information files (Open Government Licence – Ontario) · DistrictIQ's copy last updated August 29, 2026The Ministry's records are the identity source; the school's own website is linked for anything that changes during the year.
- Attendance boundary
- York CDSB — published attendance-boundary data · Boundaries as published by the board for the 2026-27 school year. DistrictIQ last downloaded it 2026-08-29.Boundaries are drawn from the board's own boundary service; placement is confirmed by the board, and being inside a boundary does not guarantee a seat.
- EQAO results
- Education Quality and Accountability Office, as published by the Ministry of Education · 2024–25 assessment; history 2017-18 to 2024-25 where publishedPercent of students meeting the provincial standard, shown beside city, board and provincial figures for the same assessment. Not a ranking.
- Programs (Regular Track, French Immersion, Extended French and others)
- York CDSB — program areas in the board's boundary dataOnly programs the board publishes a boundary or program area for; application-based programs are not inferred.
- Homes for sale and rentals inside the boundary
- MLS® listings via IDX from the school's regular-track boundary · Counts and medians as of October 23, 2026; listings refresh continuouslyActive listings and asking prices only. Sold and leased prices are not shown.
- Communities in this catchment
- Derived from the communities of active listings inside the boundaryA community appears when it has active listings inside the boundary; it is not a board designation.
- Licensed child care nearby
- Ontario Ministry of Education — licensed child care facilities (Open Government Licence – Ontario)Facilities near the school, not necessarily inside the boundary or operating in the school.
School & assessment data
EQAO results are provided for informational purposes only and should not be interpreted as a ranking of school quality. Academic outcomes are only one factor families may wish to consider. EQAO results shown reflect the 2024–2025 assessment.
School and assessment data is sourced from the Ontario Ministry of Education, the Education Quality and Accountability Office (EQAO), Ontario Open Data, and the applicable public and Catholic district school boards across the regions we cover (Southern Ontario).
School information — including school boundaries, eligibility, EQAO results, programs and enrolment — is provided for general informational purposes only and may be inaccurate or out of date. Boundaries, eligibility, programs and enrolment can change at any time. EQAO figures reflect past assessment results, are shown per test relative to the city-wide average, are not a ranking, and do not predict any student's outcome. Always confirm current school boundaries and eligibility directly with the applicable school board before relying on this information.
Where our data comes from · source, licence and refresh cadence for every dataset.
Listing data is provided by the Toronto Regional Real Estate Board (TRREB) and PropTx under the Internet Data Exchange (IDX) program. The information is deemed reliable but is not guaranteed accurate by TRREB, PropTx, CREA or DistrictIQ Inc., Brokerage, may not reflect the most current status, and is subject to errors, omissions, prior sale, change, or withdrawal without notice. Listings should be independently verified.