For parents eyeing a Singapore primary school, one number quietly decides more than almost any other: your home’s distance from the school. In an oversubscribed school, living within 1km can be the difference between a confident registration and a nervous wait for a ballot result. That’s exactly why Thomson Reserve, on Bright Hill Drive, draws so much attention from young families — it sits within 1km of Ai Tong School, one of the most sought-after primary schools in the Bishan–Thomson area.
But what does “within 1km” really buy you? Does it guarantee a place? This guide explains how Primary 1 (P1) registration works, why the 1km band is so powerful, and what Ai Tong School’s actual 2025 registration data tells us — honestly, including where a ballot can still apply.
How Singapore’s P1 Registration Actually Works
Every year, MOE runs P1 registration in a fixed sequence of phases. Places are filled phase by phase, and the later phases are where most home-buying families compete:
- Phase 1: For a child with a sibling already in the school.
- Phase 2A: For children of alumni (who joined the alumni association in time) or staff, among others.
- Phase 2B: For children of parent volunteers, or families connected to the school’s affiliated clan or community organisation.
- Phase 2C: Open to all children not yet registered — this is the phase most families rely on.
- Phase 2C Supplementary & Phase 3: For remaining vacancies and non-citizen applicants.
The crucial mechanic: when a phase receives more applicants than vacancies, places are decided by balloting — and home-to-school distance sets the priority order. Read more about how Property Rules for P1 home distance at this article.
Why the 1km Distance Band Is Decisive
When a popular school is oversubscribed in Phases 2B or 2C, MOE doesn’t ballot everyone equally. It works through distance-and-citizenship priority bands in this order:
- Singapore Citizens living within 1km of the school — first priority
- Singapore Citizens living between 1km and 2km — next
- Singapore Citizens living beyond 2km — after that
- Permanent Residents follow, in the same distance order
In a heavily subscribed school, the places are often exhausted before the queue ever reaches families beyond 1km. So being inside the 1km radius isn’t a tie-breaker — it’s frequently the price of entry for the open phases. This is the single biggest reason buyers pay attention to a home’s school catchment.
Ai Tong School: What the 2025 Numbers Show
Ai Tong School is a government-aided, Special Assistance Plan (SAP) primary school at 100 Bright Hill Drive — founded in 1912, affiliated with the Singapore Hokkien Huay Kuan, and known for its bilingual English–Chinese education. It’s also consistently oversubscribed. Here’s the actual 2025 P1 Registration Exercise data:
| Phase | Vacancies | Applicants | Outcome |
|---|---|---|---|
| Phase 1 | 240 | 131 | All placed |
| Phase 2A | 109 | 134 | Balloted |
| Phase 2B | 20 | 62 | Balloted — within 1km |
| Phase 2C | 43 | 81 | Balloted — within 1km |
The decisive detail sits in those last two rows. In 2025, every place in Phases 2B and 2C went to Singapore Citizen families living within 1km of the school. If you lived beyond 1km, you effectively couldn’t secure a spot through the open phases at Ai Tong that year.
The honest part: being within 1km gets you into the priority band that mattered — but at a school this popular, the band itself can be oversubscribed. In Phase 2C 2025, 76 within-1km applicants balloted for 43 places. So 1km dramatically improves your odds; it does not guarantee a seat.
What Living at Thomson Reserve Gives You
Thomson Reserve sits on Bright Hill Drive — the same road as Ai Tong School at 100 Bright Hill Drive, essentially next door. That places it comfortably inside the 1km radius, in the top distance-priority band for P1 registration.
For a young family, that’s a meaningful, durable advantage: not a marketing slogan, but a measurable position in the one queue that decides school access. Just remember the caveat above — it’s priority, not a promise, and demand shifts each year, so parents should always confirm their exact home-to-school distance via OneMap or MOE before relying on it.
Beyond Ai Tong: A Wider School Cluster
Ai Tong is the headline, but it isn’t the only option nearby. Within roughly 2km, Thomson Reserve families have access to a strong cluster across primary, secondary and junior college levels:
- Catholic High School (Primary & Secondary)
- CHIJ St Nicholas Girls’ School (Primary & Secondary)
- Marymount Convent School (Primary)
- Eunoia Junior College
- Raffles Institution (Secondary & JC)
That depth of options — from a 1km priority primary school to nearby secondary and JC choices — is part of what makes this an address built for the long haul of a family’s education journey.
The Bottom Line for Parents
In Singapore’s P1 system, location does much of the heavy lifting, and Ai Tong’s 2025 results make the point bluntly: the open-phase places went to families within 1km. Thomson Reserve’s position on Bright Hill Drive puts your child in exactly that band — a genuine, data-backed head start, even if a ballot can still apply. If schools are central to your decision, this is an address worth understanding properly before you choose. And schools are only half the story — Thomson Reserve also enters the market with a notably favourable cost base, as we cover in why its land cost beats recent OCR launches.
WhatsApp Us About Schools & the 1km Priority
Frequently Asked Questions
Is Thomson Reserve within 1km of Ai Tong School?
Yes. Thomson Reserve is on Bright Hill Drive, the same road as Ai Tong School (100 Bright Hill Drive), placing it within the 1km priority radius for P1 registration. Parents should still confirm the exact distance via OneMap or MOE.
Does living within 1km guarantee a place at Ai Tong?
No. Living within 1km places your child in the top distance-priority band, but if that band is oversubscribed a ballot still applies. In Phase 2C 2025, 76 within-1km applicants balloted for 43 places.
Which P1 phase do most home buyers use?
Most families without sibling, alumni or volunteer links register in Phase 2C, the open phase — which is precisely where the 1km distance band is decisive at popular schools like Ai Tong.
Ai Tong P1 figures are from the 2025 Primary 1 Registration Exercise (MOE). Distances are approximate — confirm exact home-to-school distance via OneMap / MOE before relying on it. Distance priority within 1km does not guarantee a place; balloting applies when a phase is oversubscribed, and demand changes each year. This article is for general information and is subject to change without notice.
