Blk 221 Serangoon Ave 4 is an HDB block in Serangoon (completed in 1984, 12 storeys, 157 units). As of Jul 2026, its median resale price over the last 24 months is $495,000, about 37% below the Serangoon median, from 8 sales. 239 resale transactions have been recorded here since 1990.
Explore this block on the interactive map →| Town | Serangoon |
|---|---|
| Completed | 1984 |
| Lease from | 1984 |
| Storeys | 12 |
| Dwelling units | 157 |
| Unit mix (sold) | 3-room ×99 · 4-room ×57 · 5-room ×1 |
| Recorded resales | 239 since 1990 |
| Flat type | Median price | Median $/m² | Sales |
|---|---|---|---|
| 3-Room | $495,000 | $7,313/m² | 7 |
| 4-Room | $593,888 | $6,455/m² | 1 |
Median monthly rent at this block: $3,200/mo (6 rental contracts, last 12 months).
Estimated gross rental yield: ~7.8% (Serangoon average: ~5.1%) — annual median rent over median resale price, before taxes, fees and vacancy.
On price per square metre, this block is cheaper than 43% of Serangoon blocks with recent sales.
For a typical 3-room flat here, our price model estimates $416,945–$466,413 (central estimate $441,679). Recent sales — median $412,580 — sit below that range. The model explains 94% of resale prices with a typical error of ±6%. Indicative only — not an official valuation.
| 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 | $496,888 | $496,888 | 1 |
| Record sale | $770,000 (5-Room, 2019-07) |
|---|---|
| First recorded sale | $45,000 (1990-01) |
| Busiest year | 1999 · 13 sales |
| 10-year change (real) | +30% (+2.7%/yr, 2016→2026) |
| Total transacted | $57.9M across 239 sales |
| Month | Flat type | Storey | Area (m²) | Price |
|---|---|---|---|---|
| 2026-01 | 3-Room | 07 TO 09 | 67 | $496,888 |
| 2025-11 | 4-Room | 07 TO 09 | 92 | $593,888 |
| 2025-08 | 3-Room | 07 TO 09 | 67 | $495,000 |
| 2025-07 | 3-Room | 04 TO 06 | 71 | $495,000 |
| 2025-06 | 3-Room | 10 TO 12 | 67 | $490,000 |
| 2025-06 | 3-Room | 07 TO 09 | 67 | $510,000 |
| 2024-08 | 3-Room | 01 TO 03 | 71 | $408,888 |
| 2024-08 | 3-Room | 10 TO 12 | 67 | $440,000 |
| 2024-07 | 4-Room | 10 TO 12 | 99 | $620,000 |
| 2024-04 | 3-Room | 04 TO 06 | 67 | $400,000 |
| 2024-03 | 3-Room | 01 TO 03 | 67 | $380,000 |
| 2023-10 | 4-Room | 07 TO 09 | 92 | $579,000 |
| 2023-08 | 3-Room | 07 TO 09 | 67 | $392,000 |
| 2023-04 | 3-Room | 07 TO 09 | 67 | $385,000 |
| 2022-12 | 3-Room | 01 TO 03 | 67 | $380,000 |
| 2022-11 | 4-Room | 07 TO 09 | 94 | $590,000 |
| 2022-08 | 4-Room | 07 TO 09 | 94 | $520,888 |
| 2022-01 | 4-Room | 04 TO 06 | 99 | $470,000 |
| 2021-12 | 3-Room | 07 TO 09 | 67 | $355,000 |
| 2021-10 | 3-Room | 04 TO 06 | 67 | $333,000 |
| Block | Median (24 mo) | Median $/m² |
|---|---|---|
| 1. Blk 213 | $800,000 | $6,860/m² |
| 2. Blk 216 | $740,000 | $6,408/m² |
| 3. Blk 212 | $725,000 | $5,992/m² |
| 4. Blk 228 | $665,000 | $7,269/m² |
| 5. Blk 226 | $648,000 | $7,121/m² |
| 6. Blk 224 | $620,000 | $6,667/m² |
| 7. Blk 211 | $620,000 | $6,703/m² |
| 8. Blk 229 | $620,000 | $6,813/m² |
| 9. Blk 220 | $620,000 | $6,813/m² |
| 10. Blk 223 | $600,000 | $6,642/m² |
| 11. Blk 215 | $575,000 | $7,271/m² |
| 12. Blk 227 | $571,000 | $7,460/m² |
| 13. Blk 214 | $570,000 | $6,951/m² |
| 14. Blk 230 | $554,000 | $6,633/m² |
| 15. Blk 221 | $495,000 | $7,143/m² |
Showing the top 15 of 20 blocks.
The median resale price over the last 24 months is $495,000 (8 sales, as of Jul 2026). See the by-type table above for 3-room vs 4-room medians.
For a typical 3-room flat here, our price model estimates $416,945–$466,413 (central estimate $441,679). Recent sales — median $412,580 — sit below that range.
The median monthly rent is $3,200/mo over the last 12 months (6 contracts).
The block was completed in 1984 and its 99-year lease runs from 1984.