Blk 509 Serangoon Nth Ave 4 is an HDB block in Serangoon (completed in 1996, 8 storeys, 87 units). As of Jul 2026, its median resale price over the last 24 months is $634,944, about 19% below the Serangoon median, from 4 sales. 82 resale transactions have been recorded here since 1990.
Explore this block on the interactive map →| Town | Serangoon |
|---|---|
| Completed | 1996 |
| Lease from | 1997 |
| Storeys | 8 |
| Dwelling units | 87 |
| Unit mix (sold) | 4-room ×66 · 5-room ×21 |
| Recorded resales | 82 since 1990 |
| Flat type | Median price | Median $/m² | Sales |
|---|---|---|---|
| 4-Room | $634,944 | $6,255/m² | 4 |
Median monthly rent at this block: $3,400/mo (3 rental contracts, last 12 months).
Estimated gross rental yield: ~6.4% (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 80% of Serangoon blocks with recent sales.
For a typical 4-room flat here, our price model estimates $617,557–$690,827 (central estimate $654,192). Recent sales — median $610,000 — 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 |
|---|---|---|---|
| 2001 | $265,500 | $414,766 | 17 |
| 2002 | $241,500 | $378,757 | 10 |
| 2003 | $238,000 | $371,455 | 3 |
| 2004 | $250,000 | $383,767 | 3 |
| 2005 | $235,000 | $359,042 | 3 |
| 2006 | $228,000 | $345,014 | 3 |
| 2007 | $295,000 | $437,175 | 1 |
| 2008 | $341,000 | $473,899 | 2 |
| 2009 | $318,500 | $440,042 | 2 |
| 2010 | $331,000 | $444,732 | 3 |
| 2011 | $397,000 | $506,794 | 5 |
| 2012 | $439,000 | $535,861 | 2 |
| 2013 | $446,500 | $532,430 | 2 |
| 2014 | $452,500 | $534,063 | 4 |
| 2015 | $403,000 | $478,140 | 2 |
| 2016 | $382,888 | $456,695 | 1 |
| 2017 | $442,500 | $524,771 | 2 |
| 2018 | $476,000 | $562,035 | 5 |
| 2019 | $400,000 | $469,633 | 1 |
| 2020 | $460,000 | $541,010 | 2 |
| 2021 | $535,000 | $614,975 | 1 |
| 2022 | $520,000 | $563,202 | 1 |
| 2023 | $520,000 | $537,235 | 1 |
| 2024 | $645,000 | $650,824 | 2 |
| 2025 | $623,000 | $623,000 | 3 |
| 2026 | $660,000 | $660,000 | 1 |
| Record sale | $690,000 (5-Room, 2024-04) |
|---|---|
| First recorded sale | $276,000 (2001-03) |
| Busiest year | 2001 · 17 sales |
| 10-year change (real) | +45% (+3.8%/yr, 2016→2026) |
| Total transacted | $29.6M across 82 sales |
| Month | Flat type | Storey | Area (m²) | Price |
|---|---|---|---|---|
| 2026-01 | 4-Room | 04 TO 06 | 101 | $660,000 |
| 2025-11 | 4-Room | 04 TO 06 | 101 | $610,000 |
| 2025-07 | 4-Room | 01 TO 03 | 101 | $623,000 |
| 2025-06 | 4-Room | 07 TO 09 | 102 | $646,888 |
| 2024-04 | 4-Room | 04 TO 06 | 101 | $600,000 |
| 2024-04 | 5-Room | 04 TO 06 | 120 | $690,000 |
| 2023-01 | 4-Room | 04 TO 06 | 102 | $520,000 |
| 2022-12 | 4-Room | 04 TO 06 | 102 | $520,000 |
| 2021-01 | 5-Room | 04 TO 06 | 120 | $535,000 |
| 2020-03 | 4-Room | 01 TO 03 | 102 | $380,000 |
| 2020-01 | 5-Room | 04 TO 06 | 119 | $540,000 |
| 2019-03 | 4-Room | 04 TO 06 | 101 | $400,000 |
| 2018-11 | 4-Room | 01 TO 03 | 102 | $378,000 |
| 2018-08 | 5-Room | 01 TO 03 | 120 | $476,000 |
| 2018-08 | 5-Room | 01 TO 03 | 120 | $525,000 |
| 2018-04 | 5-Room | 04 TO 06 | 120 | $520,000 |
| 2018-03 | 4-Room | 04 TO 06 | 102 | $403,000 |
| 2017-09 | 5-Room | 07 TO 09 | 120 | $510,000 |
| 2017-07 | 4-Room | 01 TO 03 | 101 | $375,000 |
| 2016-07 | 4-Room | 07 TO 09 | 102 | $382,888 |
| Block | Median (24 mo) | Median $/m² |
|---|---|---|
| 1. Blk 519 | $1,193,084 | $8,033/m² |
| 2. Blk 506A | $1,130,000 | $7,740/m² |
| 3. Blk 527 | $1,092,500 | $7,483/m² |
| 4. Blk 526 | $1,083,000 | $7,318/m² |
| 5. Blk 520 | $1,059,000 | $7,156/m² |
| 6. Blk 537 | $1,059,000 | $7,204/m² |
| 7. Blk 525 | $1,038,888 | $7,000/m² |
| 8. Blk 542 | $1,015,444 | $6,908/m² |
| 9. Blk 506 | $1,010,000 | $6,966/m² |
| 10. Blk 539 | $1,008,944 | $6,864/m² |
| 11. Blk 535 | $983,888 | $6,693/m² |
| 12. Blk 506B | $970,000 | $6,644/m² |
| 13. Blk 507 | $840,000 | $6,942/m² |
| 14. Blk 523 | $827,500 | $6,783/m² |
| 15. Blk 510 | $808,000 | $6,790/m² |
Showing the top 15 of 40 blocks.
The median resale price over the last 24 months is $634,944 (4 sales, as of Jul 2026). See the by-type table above for 3-room vs 4-room medians.
For a typical 4-room flat here, our price model estimates $617,557–$690,827 (central estimate $654,192). Recent sales — median $610,000 — sit below that range.
The median monthly rent is $3,400/mo over the last 12 months (3 contracts).
The block was completed in 1996 and its 99-year lease runs from 1997.