Blk 421 Serangoon Central — HDB resale prices
HDB resale prices, Serangoon · 4-Room, 5-Room · built 1988
median resale price, last 24 months
2 sales in that window · as of Sep 2026
How it compares
Blk 421 Serangoon Central is an HDB block in Serangoon (completed in 1988, 13 storeys, 96 units). As of Sep 2026, its median resale price over the last 24 months is $841,500, about 26% above the Serangoon median, from 2 sales. 93 resale transactions have been recorded here since 1990.
Price by year
At a glance
Unit mix (sold): 4-room ×72 · 5-room ×24
Prices by flat type — last 24 months (as of Sep 2026)
Median monthly rent at this block: $3,600/mo (6 rental contracts, last 12 months).
Estimated gross rental yield: ~5.1% (Serangoon average: ~6.3%) — annual median rent over median resale price, before taxes, fees and vacancy.
On price per square metre, this block is cheaper than 35% of Serangoon blocks with recent sales.
What the price model says
For a typical 4-room flat here, our price model estimates $713,470–$797,639 (central estimate $755,554). Recent sales — median $774,858 — sit within that range. The model explains 94% of resale prices with a typical error of ±6%. Indicative only — not an official valuation.
Median resale price by year
| Year | Median (nominal) | Median (today's $) | Sales |
|---|---|---|---|
| 1993 | $208,000 | $359,941 | 1 |
| 1994 | $212,000 | $355,854 | 5 |
| 1995 | $335,000 | $552,780 | 4 |
| 1996 | $400,000 | $651,050 | 3 |
| 1997 | $341,000 | $544,016 | 5 |
| 1998 | $290,000 | $463,914 | 10 |
| 1999 | $301,500 | $482,196 | 12 |
| 2000 | $318,000 | $501,817 | 2 |
| 2001 | $275,125 | $429,802 | 4 |
| 2002 | $342,000 | $536,376 | 3 |
| 2003 | $281,000 | $438,566 | 1 |
| 2004 | $270,000 | $414,468 | 1 |
| 2005 | $242,000 | $369,737 | 1 |
| 2006 | $280,000 | $423,702 | 3 |
| 2007 | $327,500 | $485,339 | 2 |
| 2008 | $435,000 | $604,534 | 2 |
| 2009 | $420,000 | $580,275 | 4 |
| 2010 | $458,000 | $615,369 | 2 |
| 2011 | $562,500 | $718,064 | 2 |
| 2012 | $595,000 | $726,281 | 2 |
| 2013 | $649,000 | $773,902 | 2 |
| 2014 | $575,000 | $678,643 | 3 |
| 2015 | $627,500 | $744,499 | 2 |
| 2016 | $608,000 | $725,200 | 1 |
| 2017 | $700,000 | $830,146 | 1 |
| 2018 | $628,000 | $741,508 | 1 |
| 2019 | $635,000 | $745,542 | 2 |
| 2020 | $590,000 | $693,904 | 2 |
| 2021 | $659,000 | $757,511 | 2 |
| 2022 | $680,000 | $736,495 | 3 |
| 2023 | $770,000 | $795,521 | 3 |
| 2025 | $818,000 | $818,000 | 1 |
| 2026 | $865,000 | $865,000 | 1 |
Records
| Record sale | $875,000 (5-Room, 2023-07) |
|---|---|
| First recorded sale | $208,000 (1993-11) |
| Busiest year | 1999 · 12 sales |
| 10-year change (real) | +19% (+1.8%/yr, 2016→2026) |
| Total transacted | $39.6M across 93 sales |
Recent resale transactions
| Month | Flat type | Storey | Area | Price |
|---|---|---|---|---|
| 2026-04 | 4-Room | 10–12 | 105 m² | $865,000 |
| 2025-03 | 5-Room | 04–06 | 121 m² | $818,000 |
| 2023-10 | 4-Room | 07–09 | 103 m² | $770,000 |
| 2023-07 | 5-Room | 04–06 | 121 m² | $875,000 |
| 2023-04 | 4-Room | 10–12 | 113 m² | $730,000 |
| 2022-09 | 4-Room | 04–06 | 105 m² | $680,000 |
| 2022-09 | 4-Room | 07–09 | 94 m² | $627,000 |
| 2022-02 | 4-Room | 13–15 | 111 m² | $748,000 |
| 2021-09 | 4-Room | 07–09 | 103 m² | $678,000 |
| 2021-07 | 4-Room | 10–12 | 105 m² | $640,000 |
| 2020-07 | 4-Room | 04–06 | 111 m² | $660,000 |
| 2020-06 | 4-Room | 10–12 | 103 m² | $520,000 |
| 2019-06 | 4-Room | 07–09 | 105 m² | $635,000 |
| 2019-01 | 4-Room | 10–12 | 105 m² | $635,000 |
| 2018-11 | 4-Room | 04–06 | 103 m² | $628,000 |
| 2017-11 | 4-Room | 10–12 | 113 m² | $700,000 |
| 2016-04 | 4-Room | 07–09 | 103 m² | $608,000 |
| 2015-09 | 5-Room | 07–09 | 121 m² | $730,000 |
| 2015-01 | 4-Room | 04–06 | 111 m² | $525,000 |
| 2014-10 | 5-Room | 10–12 | 121 m² | $738,000 |
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Showing the top 15 of 24 priced blocks.
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Quick answers
How much does a flat at Blk 421 Serangoon Central cost?
The median resale price over the last 24 months is $841,500 (2 sales, as of Sep 2026). See the by-type table above for 3-room vs 4-room medians.
Is Blk 421 Serangoon Central fairly priced?
For a typical 4-room flat here, our price model estimates $713,470–$797,639 (central estimate $755,554). Recent sales — median $774,858 — sit within that range.
What is the rent at Blk 421 Serangoon Central?
The median monthly rent is $3,600/mo over the last 12 months (6 contracts).
How old is Blk 421 Serangoon Central?
The block was completed in 1988 and its 99-year lease runs from 1989.