Blk 421 Serangoon Ctrl
Completed 1988 · 13 storeys · 96 flats · 62 years 01 month remaining · 16 resale transactions on record · median household income in Serangoon: $11,500/mo
13 storeys · completed 1988
What the record shows
A 4-room here sold for $865,000 in Apr 2026. The same flat type in this block averaged $681,500 in 2020 - a gain of $183,500 - about $84 a day while the owner slept.
This block crosses 60 years remaining in 2028 - the line where CPF usage rules begin tightening for buyers. In Serangoon over the last two years, flats below that line sold at a median 1% above their younger neighbours' PSF (481 sales).
Rent check
What flats in this block actually rented for in the last 12 months - official approvals, not listings. If you’re quoted much more, you have a number to negotiate with.
| Type | Block median | Range | Serangoon median | Gross yield | Rented |
|---|---|---|---|---|---|
| 4-ROOM | $3,400/mo | $1,000–$3,900 | $3,400/mo | - | 3 |
| 5-ROOM | $3,950/mo | $3,800–$4,300 | $3,600/mo | - | 3 |
Price trend
median PSF by year · ━ this block · ╌ Serangoon · gaps = years with no sales here
The height gradient
every sale in 5 years, plotted by starting floor · 10 sales - do higher floors really fetch more here?
Every recent sale HDB official record, latest 16
| Month | Type | Storey | Area (sqm) | Price | PSF | Lease left |
|---|---|---|---|---|---|---|
| Apr 2026 | 4 ROOM | 10 to 12 | 105 | $865,000 | $765 | 62y 01m |
| Mar 2025 | 5 ROOM | 04 to 06 | 121 | $818,000 | $628 | 63y 03m |
| Oct 2023 | 4 ROOM | 07 to 09 | 103 | $770,000 | $695 | 64y 08m |
| Jul 2023 | 5 ROOM | 04 to 06 | 121 | $875,000 | $672 | 65y |
| Apr 2023 | 4 ROOM | 10 to 12 | 113 | $730,000 | $600 | 65y 02m |
| Sept 2022 | 4 ROOM | 07 to 09 | 94 | $627,000 | $620 | 65y 08m |
| Sept 2022 | 4 ROOM | 04 to 06 | 105 | $680,000 | $602 | 65y 09m |
| Feb 2022 | 4 ROOM | 13 to 15 | 111 | $748,000 | $626 | 66y 03m |
| Sept 2021 | 4 ROOM | 07 to 09 | 103 | $678,000 | $612 | 66y 09m |
| Jul 2021 | 4 ROOM | 10 to 12 | 105 | $640,000 | $566 | 66y 11m |
| Jul 2020 | 4 ROOM | 04 to 06 | 111 | $660,000 | $552 | 67y 10m |
| Jun 2020 | 4 ROOM | 10 to 12 | 103 | $520,000 | $469 | 68y 01m |
| Jun 2019 | 4 ROOM | 07 to 09 | 105 | $635,000 | $562 | 68y 11m |
| Jan 2019 | 4 ROOM | 10 to 12 | 105 | $635,000 | $562 | 69y 05m |
| Nov 2018 | 4 ROOM | 04 to 06 | 103 | $628,000 | $566 | 69y 06m |
| Nov 2017 | 4 ROOM | 10 to 12 | 113 | $700,000 | $576 | 70y 06m |
Who lives in Serangoon
Census of Population 2020 · planning-area aggregates · SingStat via data.gov.sg
The neighbourhood
What sits around this address - distances computed from official OneMap and LTA records.
The neighbourhood, photographed
freely-licensed photographs taken within ~450 m · Wikimedia Commons
Around this block
The nearest blocks by actual distance - street names are postal artifacts, so true neighbours often sit on a different road. Price gaps are median-vs-median on the flat type both blocks actually trade.
Condos nearby
The private premium, measured: the nearest condo trades at 2.5×this block’s PSF.
Grounded in this block’s own resale record, trend and lease - ask away.