Blk 509 Serangoon North Avenue 4 — HDB resale prices
HDB resale prices, Serangoon · 4-Room · built 1996
median resale price, last 24 months
4 sales in that window · as of Sep 2026
How it compares
Blk 509 Serangoon North Avenue 4 is an HDB block in Serangoon (completed in 1996, 8 storeys, 87 units). As of Sep 2026, its median resale price over the last 24 months is $634,944, about 5% below the Serangoon median, from 4 sales. 82 resale transactions have been recorded here since 1990.
Price by year
At a glance
Unit mix (sold): 4-room ×66 · 5-room ×21
Prices by flat type — last 24 months (as of Sep 2026)
Median monthly rent at this block: $3,300/mo (3 rental contracts, last 12 months).
Estimated gross rental yield: ~6.2% (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 81% of Serangoon blocks with recent sales.
What the price model says
For a typical 4-room flat here, our price model estimates $618,162–$691,088 (central estimate $654,625). 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.
Median resale price by year
| 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 |
Records
| 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 |
Recent resale transactions
| Month | Flat type | Storey | Area | Price |
|---|---|---|---|---|
| 2026-01 | 4-Room | 04–06 | 101 m² | $660,000 |
| 2025-11 | 4-Room | 04–06 | 101 m² | $610,000 |
| 2025-07 | 4-Room | 01–03 | 101 m² | $623,000 |
| 2025-06 | 4-Room | 07–09 | 102 m² | $646,888 |
| 2024-04 | 5-Room | 04–06 | 120 m² | $690,000 |
| 2024-04 | 4-Room | 04–06 | 101 m² | $600,000 |
| 2023-01 | 4-Room | 04–06 | 102 m² | $520,000 |
| 2022-12 | 4-Room | 04–06 | 102 m² | $520,000 |
| 2021-01 | 5-Room | 04–06 | 120 m² | $535,000 |
| 2020-03 | 4-Room | 01–03 | 102 m² | $380,000 |
| 2020-01 | 5-Room | 04–06 | 119 m² | $540,000 |
| 2019-03 | 4-Room | 04–06 | 101 m² | $400,000 |
| 2018-11 | 4-Room | 01–03 | 102 m² | $378,000 |
| 2018-08 | 5-Room | 01–03 | 120 m² | $525,000 |
| 2018-08 | 5-Room | 01–03 | 120 m² | $476,000 |
| 2018-04 | 5-Room | 04–06 | 120 m² | $520,000 |
| 2018-03 | 4-Room | 04–06 | 102 m² | $403,000 |
| 2017-09 | 5-Room | 07–09 | 120 m² | $510,000 |
| 2017-07 | 4-Room | 01–03 | 101 m² | $375,000 |
| 2016-07 | 4-Room | 07–09 | 102 m² | $382,888 |
Serangoon North Avenue 4 blocks ranked by price
Showing the top 15 of 41 priced blocks.
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Quick answers
How much does a flat at Blk 509 Serangoon North Avenue 4 cost?
The median resale price over the last 24 months is $634,944 (4 sales, as of Sep 2026). See the by-type table above for 3-room vs 4-room medians.
Is Blk 509 Serangoon North Avenue 4 fairly priced?
For a typical 4-room flat here, our price model estimates $618,162–$691,088 (central estimate $654,625). Recent sales — median $610,000 — sit below that range.
What is the rent at Blk 509 Serangoon North Avenue 4?
The median monthly rent is $3,300/mo over the last 12 months (3 contracts).
How old is Blk 509 Serangoon North Avenue 4?
The block was completed in 1996 and its 99-year lease runs from 1997.