Is there a 1km school zone yield premium?

Ask about the 1km rule and Nanyang Primary comes up inside a minute. It is the school that anchors every conversation about buying into a priority ring, and on the caveat data it is the cleanest case against the premise. Private projects within 1km of Nanyang post a median gross yield of 2.585%, against 2.690% for the rest of District 10. They also trade 9.8% cheaper per square foot, $2,081 against $2,306. Whatever buyers are paying for around that school, it does not surface as a price premium, and it is not costing them yield either.

We ran the same comparison for every tier-1 primary school with enough private stock around it to measure. Three cohorts yield more than their district control, six yield less, and the median gap across the nine is -0.020pp. There is no 1km yield premium in Singapore private property. There is no 1km yield penalty either. The number moves in both directions by amounts too small and too inconsistent to trade on, and the belief survives because the reasoning behind it breaks at the first step.

What was measured

Every private project is matched to the schools around it, giving 8,859 project-school pairs across 2,771 projects and 76 schools. Nineteen of those schools carry a tier-1 flag, meaning they ballot out consistently at Primary 1 registration and are the ones people actually buy for. A project joins a school's cohort when it sits within 1,000m, the same kind of straight-line measure the Ministry of Education uses for priority admission, though MOE measures to the registered address rather than to a project centroid.

Yield is gross: the median rental PSF over the last four quarters of URA rental medians, annualised against the median sale PSF over the trailing three years of caveats. Of the roughly 900 projects carrying both a sale and a rental reading, 119 sit inside at least one tier-1 ring. Each cohort is then compared against the projects in the same district that sit outside that school's ring, which is the only comparison that holds location roughly constant.

What the 1km ring actually buys

Worth being precise about the thing being priced, because a good deal of the folklore attaches to a rule that is narrower than people think. Primary 1 registration runs in phases, and most families without an alumni, sibling or staff connection to a school arrive at Phase 2C. When a phase draws more applicants than there are places, the school ballots, and the ballot is ordered: Singapore citizens within 1km first, then citizens between 1km and 2km, then citizens beyond 2km, and permanent residents in the same three bands after that.

Two consequences follow. Being inside the ring improves the odds, it does not reserve a place, and a heavily oversubscribed school can ballot within the 1km band itself. And the priority is attached to an address that has to be lived in: a family admitted on home-school distance is expected to stay at that address for at least 30 months, which converts the purchase into a multi-year commitment rather than a positioning trade. An asset whose benefit is a probabilistic tiebreaker, claimable once, and locked in for two and a half years, is not the sort of thing a rental market reprices. That is the mechanism behind the numbers below.

The national number, and why it is a trap

Compared nationally, the ring looks mildly attractive. The 119 in-ring projects post a median gross yield of 3.390% at $1,674 PSF, against 3.320% at $1,865 for the 781 projects outside every ring. Higher yield at a 10% discount reads like a finding.

It is not one. That comparison is measuring geography. Tier-1 rings sit disproportionately in the suburbs, where yields run higher and PSF runs lower for reasons that have nothing to do with schools. Any national cut of this question returns the same answer and the answer is empty. The question only becomes answerable inside a district.

Inside districts, it goes both ways

Eight districts carry at least five projects on each side of the line. Four show the school cohort yielding more than the rest of the district, four show it yielding less, and the spread runs from +0.490pp in District 27 to -0.195pp in District 10.

Median gross yield of projects within 1km of any tier-1 school against the rest of the same district. Project counts in brackets. PSF gap is the ring's median sale PSF over the district remainder.

The price column is the more damaging one for the premium story. If a 1km ring were genuinely bid up, it would show as a consistent PSF premium long before it showed in yield, because price is the easiest thing for a market to move. Instead the ring is dearer in four districts and cheaper in four, from +17.1% in District 21 to -21.5% in District 23. A market that priced school access would not produce that.

District 21 deserves its own caution, because it carries both the largest positive yield gap and the largest positive price gap. Its ring is essentially the stock around Pei Hwa Presbyterian along Upper Bukit Timah, and its non-ring arm is a small set of expensive, low-yielding developments at 2.570%. The Downtown Line and the recent Beauty World launches explain more of that gap than the school does.

School by school

Narrowing from "any tier-1 school" to one named school at a time is the version of the question buyers actually ask, and it produces the same shape. Nine schools have at least five projects inside the ring and five outside it in the same district.

Control is projects in the same district outside that school's 1km ring. Sengkang Green Primary is excluded: its control arm holds a single project, which is not a comparison. Cohorts run 6 to 18 projects, so individual gaps are indicative rather than estimates.

The extremes are Pei Hwa Presbyterian at +0.580pp and Yangzheng Primary at -0.210pp, on cohorts of 18 and 13 projects respectively. Between them sit seven schools clustered inside a fifth of a percentage point of zero. Rulang -0.010pp, Red Swastika -0.020pp, and Temasek -0.050pp are indistinguishable from their districts on this measure. The finding is not any one of these rows. It is that nine cohorts point in scattered directions, which is what a non-effect looks like.

Nan Hua Primary is the version of this a buyer will feel. Its ring in District 5 trades at $1,743 PSF against $1,628 for the rest of the district, so entry costs about 7% more, and the ring yields 3.570% against 3.640%. The premium is small, the yield gap is smaller, and neither is reliably distinguishable from the ordinary variation between two sets of Clementi and Buona Vista projects. Nanyang runs the other way, with the ring cheaper on PSF and lower on yield. Neither pattern repeats often enough to be a rule.

Why everybody assumes otherwise

The intuition runs: elite school, therefore prime district, therefore expensive, therefore low yield. Step one is wrong, so nothing after it holds. Of the 19 tier-1 schools in the dataset, the private stock inside the 1km ring sits in a Core Central Region district for exactly one of them, Nanyang in District 10. Fourteen sit in Outside Central Region districts: three around District 19, two each around Districts 16, 22 and 27, and one each in Districts 18, 21, 23, 24 and 28. The remaining four ring in District 20 and District 5, both Rest of Central Region.

The typical 1km ring in Singapore is Boon Lay, Punggol, Bedok or Yishun, not Bukit Timah. Rulang Primary sits in the middle of District 22, where the ring trades at $1,493 PSF and yields 3.740%. Once the first link in the chain is a suburb rather than the prime core, the rest of the reasoning is decoration.

The second reason is that the 1km ring is contested at admission, not at purchase. Priority within 1km is a tiebreaker inside a ballot, not a place. Families who need it buy or rent against one registration window and then move on, so the demand is real, concentrated on a handful of addresses, and short-lived. It is not durable enough to shift a project's three-year median, which is precisely why it does not show up here.

What to do with this

If you are buying for a specific school, buy it as an admission option and price it as one. The ring is worth what a place at that school is worth to your family, and nothing more should be assumed about resale or rent. Verify the address against MOE's own distance tool rather than any map, including ours, because the boundary genuinely cuts through individual blocks. Then check whether the school actually balloted: oversubscription across the tier-1 list runs from Princess Elizabeth at 6.59x, Nan Hua at 4.00x and Rosyth at 3.16x down to Catholic High (Primary) at 1.17x and Naval Base at 1.15x. Paying a premium for a ring around a school that has not balloted out in years is paying for nothing.

If you are buying for yield, ignore the ring entirely and spend the attention on factors that do move the number. Walk time to the station moves it. Tenure and lease decay move it. Whether the project is priced above or below its like-for-like comparables moves it. School proximity, at project-median level, does not.

If you are selling, do not expect the market to pay you for the ring. In four of the eight districts measured, the ring trades below the district remainder, and it is unlikely a buyer will treat your postcode as the scarce thing when your neighbourhood is full of addresses with the same claim.

Limits of this reading

Cohorts run 6 to 18 projects with wide spread inside each one, so these are screening comparisons rather than estimates. Yield here is gross and tenure-blind: it takes no account of maintenance, property tax, vacancy, agent fees, or remaining lease, and a freehold project and an ageing 99-year one sit in the same column. The comparison is at project-median level, so a genuine premium confined to the particular blocks that clear the 1km line by fifty metres could exist and would not appear here. What can be said is narrow and firm: at the level a buyer screens the market, the ring does not carry a yield signal in either direction.

Related

• District 10 hub for the Nanyang catchment, where the ring is both cheaper and lower-yielding than the district.
• District 19 hub which holds three tier-1 rings and the deepest resale tape in Singapore.
• What walking distance to MRT costs per PSF for a proximity premium that does show up in the data.
• How to tell if a condo is overpriced for the like-for-like comparison to run before paying any premium.
• Mortgage and TDSR calculator with BSD, ABSD, joint-buyer IWAA, and full ROI.