Blk 221 Serangoon Avenue 4 — HDB resale prices
HDB resale prices, Serangoon · 3-Room, 4-Room · built 1984
median resale price, last 24 months
7 sales in that window · as of Sep 2026
How it compares
Blk 221 Serangoon Avenue 4 is an HDB block in Serangoon (completed in 1984, 12 storeys, 157 units). As of Sep 2026, its median resale price over the last 24 months is $495,000, about 26% below the Serangoon median, from 7 sales. 240 resale transactions have been recorded here since 1990.
Price by year
At a glance
Unit mix (sold): 3-room ×99 · 4-room ×57 · 5-room ×1
Prices by flat type — last 24 months (as of Sep 2026)
Median monthly rent at this block: $3,250/mo (7 rental contracts, last 12 months).
Estimated gross rental yield: ~7.9% (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 41% of Serangoon blocks with recent sales.
What the price model says
For a typical 3-room flat here, our price model estimates $430,621–$481,422 (central estimate $456,022). Recent sales — median $428,277 — sit below 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 |
|---|---|---|---|
| 1990 | $51,000 | $95,478 | 8 |
| 1991 | $59,900 | $108,410 | 6 |
| 1992 | $60,800 | $107,624 | 6 |
| 1993 | $86,500 | $149,687 | 10 |
| 1994 | $99,000 | $166,177 | 8 |
| 1995 | $134,500 | $221,937 | 6 |
| 1996 | $195,000 | $317,387 | 9 |
| 1997 | $200,000 | $319,071 | 9 |
| 1998 | $170,000 | $271,950 | 11 |
| 1999 | $148,000 | $236,700 | 13 |
| 2000 | $228,500 | $360,582 | 8 |
| 2001 | $158,000 | $246,829 | 10 |
| 2002 | $144,000 | $225,843 | 7 |
| 2003 | $185,000 | $288,736 | 9 |
| 2004 | $158,000 | $242,541 | 7 |
| 2005 | $163,000 | $249,038 | 7 |
| 2006 | $163,000 | $246,655 | 7 |
| 2007 | $178,000 | $263,787 | 7 |
| 2008 | $217,500 | $302,267 | 6 |
| 2009 | $275,000 | $379,942 | 5 |
| 2010 | $307,000 | $412,485 | 7 |
| 2011 | $330,000 | $421,264 | 5 |
| 2012 | $421,500 | $514,500 | 4 |
| 2013 | $360,500 | $429,879 | 2 |
| 2014 | $360,000 | $424,890 | 5 |
| 2015 | $325,000 | $385,597 | 5 |
| 2016 | $320,000 | $381,684 | 7 |
| 2017 | $408,888 | $484,909 | 7 |
| 2018 | $375,444 | $443,304 | 4 |
| 2019 | $432,000 | $507,204 | 5 |
| 2020 | $283,500 | $333,427 | 5 |
| 2021 | $360,000 | $413,815 | 6 |
| 2022 | $495,444 | $536,606 | 4 |
| 2023 | $392,000 | $404,992 | 3 |
| 2024 | $408,888 | $412,580 | 5 |
| 2025 | $495,000 | $495,000 | 5 |
| 2026 | $493,444 | $493,444 | 2 |
Records
| Record sale | $770,000 (5-Room, 2019-07) |
|---|---|
| First recorded sale | $45,000 (1990-01) |
| Busiest year | 1999 · 13 sales |
| 10-year change (real) | +29% (+2.6%/yr, 2016→2026) |
| Total transacted | $58.4M across 240 sales |
Recent resale transactions
| Month | Flat type | Storey | Area | Price |
|---|---|---|---|---|
| 2026-07 | 3-Room | 10–12 | 67 m² | $490,000 |
| 2026-01 | 3-Room | 07–09 | 67 m² | $496,888 |
| 2025-11 | 4-Room | 07–09 | 92 m² | $593,888 |
| 2025-08 | 3-Room | 07–09 | 67 m² | $495,000 |
| 2025-07 | 3-Room | 04–06 | 71 m² | $495,000 |
| 2025-06 | 3-Room | 07–09 | 67 m² | $510,000 |
| 2025-06 | 3-Room | 10–12 | 67 m² | $490,000 |
| 2024-08 | 3-Room | 10–12 | 67 m² | $440,000 |
| 2024-08 | 3-Room | 01–03 | 71 m² | $408,888 |
| 2024-07 | 4-Room | 10–12 | 99 m² | $620,000 |
| 2024-04 | 3-Room | 04–06 | 67 m² | $400,000 |
| 2024-03 | 3-Room | 01–03 | 67 m² | $380,000 |
| 2023-10 | 4-Room | 07–09 | 92 m² | $579,000 |
| 2023-08 | 3-Room | 07–09 | 67 m² | $392,000 |
| 2023-04 | 3-Room | 07–09 | 67 m² | $385,000 |
| 2022-12 | 3-Room | 01–03 | 67 m² | $380,000 |
| 2022-11 | 4-Room | 07–09 | 94 m² | $590,000 |
| 2022-08 | 4-Room | 07–09 | 94 m² | $520,888 |
| 2022-01 | 4-Room | 04–06 | 99 m² | $470,000 |
| 2021-12 | 3-Room | 07–09 | 67 m² | $355,000 |
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Quick answers
How much does a flat at Blk 221 Serangoon Avenue 4 cost?
The median resale price over the last 24 months is $495,000 (7 sales, as of Sep 2026). See the by-type table above for 3-room vs 4-room medians.
Is Blk 221 Serangoon Avenue 4 fairly priced?
For a typical 3-room flat here, our price model estimates $430,621–$481,422 (central estimate $456,022). Recent sales — median $428,277 — sit below that range.
What is the rent at Blk 221 Serangoon Avenue 4?
The median monthly rent is $3,250/mo over the last 12 months (7 contracts).
How old is Blk 221 Serangoon Avenue 4?
The block was completed in 1984 and its 99-year lease runs from 1984.