A couple I worked with last year fell in love with a unit that sat, by every map app they tried, 1.1 kilometres from the school they had set their hearts on. They almost walked away.
They would have been walking away from an address that qualified.
If you are buying a home partly for a child who has not started school yet, the one-kilometre rule is probably the single most misunderstood thing you are relying on. So let me set it out the way I explain it at a viewing, not the way a brochure does.
First, when distance matters at all.
Primary 1 registration runs in phases. Children with a sibling already in the school are guaranteed a place - that phase has no cap. Then come the alumni and volunteer phases, and finally Phase 2C, the open phase for families with no prior connection. The school keeps a protected floor of places through all of this: at least 20 for Phase 2B and 40 for Phase 2C, whatever the sibling intake looks like.
Distance only becomes decisive when a phase is oversubscribed - more applicants than places. At that point places are given out in a strict order. Singapore Citizens go first - within one kilometre, then one to two kilometres, then further out - and only once every Citizen has been placed does MOE work down through Permanent Residents in that same order. So a PR family living inside the ring still sits behind a Citizen family living well beyond two kilometres. Worth knowing if you are buying on PR status. If a band itself has more children than places, it goes to a ballot, within that band only.
Second, the part almost everyone measures wrongly.
MOE does not measure from the school gate to your front door. The official Home-School Distance runs from the boundary of the school site to the outline of your building - fence to wall, not flagpole to flagpole. On a large school campus, the fence can be more than a hundred metres closer to you than the point a map app uses.
That is how my couple’s “1.1 km” unit qualified. It is also how a unit that looks safely inside can sit closer to the edge than its owners believe. The straight line you draw on a map is a guide; the measurement that decides your child’s queue is a different one.
What I ask families to check before they commit:
- Which band is the address in - not how many metres a map shows? Bands decide priority; metres do not.
- How has the school actually balloted, year after year? One tight year is noise. Ten tight years is a pattern.
- If the address is borderline, have you checked it on OneMap’s official school query for the current year? MOE anchors the measurement to the school’s land boundary precisely so it does not drift - but your side of the line can still move if a development’s plans are filed or revised. Check it in the year you actually register.
- Is the development new? For new launches the official distance is only drawn once the building plans are filed, and it is measured to the building outline in those plans. It can land on either side of what the maps suggested, so treat an unbuilt address as unconfirmed until OneMap says otherwise.
- Are you prepared to live there? The address you register with must be your genuine residence, and MOE expects you to stay at least 30 months from the start of the Registration Exercise - that applies if the distance category is what won you the place.
None of this is a reason to panic-buy inside a ring, and none of it guarantees a place - a ballot is still a ballot. But the families who get this right are the ones who treat the ring as a queue they are joining, not a line on a map.
I built a tool that shows all of it in one place - every primary school in Singapore, which HDB and condo blocks fall inside each school’s one-kilometre band, and how hard each school has balloted since 2009. Landed homes I check by hand, so message me and I will run one for you. It is free, and it is the first thing I open when a family tells me a school matters to them: the school map.