Walk through any Bukit Timah viewing in November and you will see the same scene: a young family pacing the unit with a phone open to OneMap, measuring the straight-line distance to Nanyang Primary. The 1km rule is not a marketing gimmick. It is a real MOE allocation mechanic that quietly underwrites a measurable PSF premium across districts 10, 11, 15, and a few specific HDB estates. This guide explains how the rule works, which schools matter, and how much the premium typically costs.
For Primary 1 registration, MOE uses a phased system. After alumni and sibling priority, the next two phases are catchment based:
For oversubscribed schools, Phase 2C is where the 1km rule bites. Living within 1km is often the difference between getting in and being balloted out. The address must also be the registered residential address for at least 30 months from the date of P1 registration if you used distance priority, otherwise the school can withdraw the place.
Not every primary school creates a property premium. The premium concentrates on roughly 15 to 20 oversubscribed names that consistently see Phase 2C ballot:
The premium attaches to the address, not the school list. A condo 950m from Nanyang Primary commands a different number than the same product at 1.1km, even on the same road.
From transaction patterns in the last five years, the school catchment effect on PSF typically falls between 5% and 15%, with the higher end concentrated in three situations:
The premium narrows for 1-bed and 2-bed units, since young families rarely buy them, and for ultra-prime addresses where lifestyle and prestige already dominate the price.
Within the 1km zone of Nanyang Primary, mid-tier freehold condos around King's Road and Coronation Road typically transact 8% to 12% above similar specification freehold projects in district 21 outside any top school zone. The same effect applies around Henry Park Primary along Holland Grove and Holland Road, where the catchment overlaps with the Methodist Girls' zone for an unusual double-school address.
Around Raffles Girls' Primary on Hillcrest Road, the 1km radius covers parts of Dunearn, Watten, and Bukit Timah Road. Family-sized 3-bed and 4-bed units within this radius trade at a 5% to 10% PSF premium versus similar units along Newton Road or Thomson Road just outside the radius. ACS Primary on Barker Road overlaps significantly, which adds a layer of optionality buyers will pay for.
Along Marine Parade Road and Mountbatten Road, units within 1km of Tao Nan School consistently outperform comparable Marine Parade stock outside the catchment by roughly 6% to 10%. The premium is amplified when the project is also within 1km of CHIJ Katong Primary or Kong Hwa, allowing parents to hedge their school choice.
School catchment premiums are real but conditional. Three risks reduce the resale value of the premium:
The right way to think about a school premium is as 3 to 6 years of compressed value. If your child enters P1 in 2028 and you sell after PSLE in 2034, you are paying today's premium and recovering it from the next P1 cohort's parents. As long as you buy something else the resale market wants (good layout, decent age, sensible PSF for the district), the school premium pays for itself across one cycle.
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