Is Catholic High within 1km of Thomson Reserve?

No. Catholic High School sits between 1km and 2km from every Thomson Reserve block. It is also a secondary school, so it carries no Primary 1 registration priority regardless of distance.

Do Nanyang Girls, Raffles Institution, or RGS count for the 1km rule at Thomson Reserve?

No. The 1km Primary 1 rule applies to primary schools only. Nanyang Girls High School, Raffles Institution, and Raffles Girls School are secondary schools and carry no Primary 1 priority at any distance.

Is the 1km measured from the project or from the individual block?

It is measured from the address, which means the block. In a six block development the result can differ between blocks, which is why the check should be run per block rather than as a project average. At Thomson Reserve all six blocks returned the same result.

Thomson Reserve Schools: The 1km Primary 1 Check

Checked 29 Sep 2026

Ai Tong School, all six blocks

Ai Tong School is within 1km of all six blocks (1, 3, 5, 7, 9 and 11 Bright Hill Drive), per OneMap School Query checked on 29 Sep 2026 (SLA data as of June 2026). Distance is one factor in MOE's P1 registration; parents should check MOE's current rules.

Block	Postal	Ai Tong within 1km
1 Bright Hill Drive	579580	Yes
3 Bright Hill Drive	579587	Yes
5 Bright Hill Drive	579594	Yes
7 Bright Hill Drive	579599	Yes
9 Bright Hill Drive	579600	Yes
11 Bright Hill Drive	579608	Yes

Source: OneMap School Query, Singapore Land Authority, checked on 29 Sep 2026 (SLA data as of June 2026). The service returns whether an address falls inside the 1km band. It does not return a distance in metres, so no metre figure is quoted here.

The part most listings get wrong

Primary schools count. Secondary schools do not.

The 1km rule belongs to Primary 1 registration. It applies to primary schools, full stop. A secondary school across the road from your future home gives your six year old exactly nothing at P1 registration, no matter how good the school is or how close it sits.

Counts for P1

Ai Tong School

Within 1km of all six blocks. A SAP school on Bright Hill Drive, the same road as the site.

No P1 priority

Catholic High, Nanyang Girls, RI, RGS

All secondary schools. They carry no Primary 1 priority at any distance. Catholic High is additionally between 1km and 2km from every block, so it falls outside the line on both counts.

Also outside the 1km line

Ang Mo Kio Primary, CHIJ St Nicholas Girls, and Marymount Convent all sit in the 1km to 2km band. They are genuine primary schools, so they remain relevant in later registration phases, but they do not give the within-1km priority.

How it actually works

Distance is one factor

Distance is one factor in MOE's P1 registration; parents should check MOE's current rules.

Two further points worth knowing before you plan around this:

Distance is measured from the residential address, so in a six block development it is measured from your block, not from the middle of the project. At Thomson Reserve all six happen to land the same way, but that is a finding, not an assumption.
There is a residency requirement attached to the address you register from. Since Thomson Reserve is expected to reach NOVP around the first quarter of 2031, estimated, families planning a P1 registration from this address should work backwards from that timeline.

School boundaries and MOE policy can change. This check reflects the position as at 29 Sep 2026 and is worth re-running closer to the year you register.

Common questions

Thomson Reserve schools, answered

Which primary school is within 1km of Thomson Reserve?

Is Catholic High within 1km?

No. It sits between 1km and 2km from every block. It is also a secondary school, so it carries no Primary 1 priority regardless of where it sits.

Does within 1km guarantee my child a place at Ai Tong?

No. Distance is one factor in MOE's P1 registration; parents should check MOE's current rules.

Do Nanyang Girls, RI, or RGS count?

No. The 1km rule applies to primary schools only. Those are all secondary schools and carry no Primary 1 priority at any distance. They appear on many Thomson Reserve listings, which is where the confusion starts.

Is the 1km measured from the project or from my block?

From the address, which means your block. In a six block development the answer can differ between blocks, which is exactly why the check should be run per block. At Thomson Reserve all six came back the same, but that had to be checked rather than assumed.

Can you run this for a specific stack I am looking at?

Yes. Send me the block and stack you are considering and I will run the check and send the OneMap output across. No cost and no obligation.

The 1km school check, run block by block