4-Room resale prices at Blk 421 Serangoon Ctrl
Resales from Jan 2017 to Apr 2026 · single-unit sales only
What do 4-room flats at Blk 421 Serangoon Ctrl sell for?
Median price since Jan 201725th to 75th percentile · S$6,460 psm median (S$6,095 psm – S$6,670 psm) · from 13 recorded sales
13 recorded resales of 4-room flats at Blk 421 Serangoon Ctrl since Jan 2017 had a median price of S$678,000 (25th to 75th percentile S$635,000 to S$730,000) and a median S$6,460 psm (S$6,095 psm to S$6,670 psm). Latest recorded sale Apr 2026. Indicative, from recorded HDB resale prices.
Latest sale
S$865,000 · 105 sqm · S$8,238 psm · Apr 2026 · storeys 10 to 12
The latest sale, in Apr 2026, had 62 years 1 month of lease remaining, as HDB recorded it.
By year
| Year | Sales | Median price | 25th to 75th percentile | Median psm |
|---|---|---|---|---|
| 2017 | 1 | S$700,000 | one sale | S$6,195 psm |
| 2018 | 1 | S$628,000 | one sale | S$6,097 psm |
| 2019 | 2 | S$635,000 | S$635,000 – S$635,000 | S$6,048 psm |
| 2020 | 1 | S$660,000 | one sale | S$5,946 psm |
| 2021 | 2 | S$659,000 | S$649,500 – S$668,500 | S$6,339 psm |
| 2022 | 3 | S$680,000 | S$653,500 – S$714,000 | S$6,670 psm |
| 2023 | 2 | S$750,000 | S$740,000 – S$760,000 | S$6,968 psm |
| 2026 | 1 | S$865,000 | one sale | S$8,238 psm |
Which storeys sold?
| Storeys | Sales |
|---|---|
| Storeys 4 to 6 | 3 |
| Storeys 7 to 9 | 4 |
| Storeys 10 to 12 | 5 |
| Storeys 13 to 15 | 1 |
How this is worked out
Every figure is HDB resales of this flat type in this block with a contract date since Jan 2017, leaving out sales flagged at ingest as unrepresentative (such as related-party transfers and statistical outliers). A page is published only with at least 5 such sales. Storeys are the ranges HDB records, not exact floors.