Block 509 Serangoon North Avenue 4
Block 509 Serangoon North Avenue 4 has 19 recorded HDB resale transactions since 2017. Latest sale: $660,000 (Jan 2026, 4 room, floors 04–06). Median $4,458/sqm. Built 1997, 70 years lease remaining.
How this block compares
- 4 Room$635,000−3.8%vs town(−$25k)+0.8%vs national(+$5k)
Median of resales in the 12 months to Jul 2026, compared with town and Singapore medians on the same basis. Flat types with fewer than two sales in the window are omitted.
What this block rents for, and the gross rental yield (annual rent ÷ resale price). This block has too few rentals on record, so figures shown are the Serangoon average.
| Flat type | Median rent /mo | Gross yield | Based on |
|---|---|---|---|
| 4-Room | $3,400 typically $3,100–$3,700 | 6.2% | Serangoon avg · block too thin |
| 5-Room | $3,600 typically $3,400–$3,900 | 5.2% | Serangoon avg · block too thin |
This block is inside the 1 km Primary 1 priority zone for 3 popular schools. When a school is oversubscribed, MOE ballots by home–school distance, and homes within 1 km are drawn first.
- This home
- School within 1 km
- School 1–2 km
- 1km ring, top priority
- 2km ring, next tier
Straight-line distances, the basis MOE uses for Home–School Distance priority. Tap a school to open it. Map © OneMap, SLA.
Other HDB blocks closest to Block 509 Serangoon North Avenue 4 in Serangoon, with their median resale price. Useful for comparing what a flat here costs against its immediate neighbours.
| Date | Floor | Type | Area | Price | $/sqm |
|---|---|---|---|---|---|
| Jan 2026 | 04 TO 06 | 4 ROOM | 101 sqm | $660,000 | $6,535 |
| Nov 2025 | 04 TO 06 | 4 ROOM | 101 sqm | $610,000 | $6,040 |
| Jul 2025 | 01 TO 03 | 4 ROOM | 101 sqm | $623,000 | $6,168 |
| Jun 2025 | 07 TO 09 | 4 ROOM | 102 sqm | $646,888 | $6,342 |
| Apr 2024 | 04 TO 06 | 4 ROOM | 101 sqm | $600,000 | $5,941 |
| Apr 2024 | 04 TO 06 | 5 ROOM | 120 sqm | $690,000 | $5,750 |
| Jan 2023 | 04 TO 06 | 4 ROOM | 102 sqm | $520,000 | $5,098 |
| Dec 2022 | 04 TO 06 | 4 ROOM | 102 sqm | $520,000 | $5,098 |
| Jan 2021 | 04 TO 06 | 5 ROOM | 120 sqm | $535,000 | $4,458 |
| Mar 2020 | 01 TO 03 | 4 ROOM | 102 sqm | $380,000 | $3,725 |
| Jan 2020 | 04 TO 06 | 5 ROOM | 119 sqm | $540,000 | $4,538 |
| Mar 2019 | 04 TO 06 | 4 ROOM | 101 sqm | $400,000 | $3,960 |
| Nov 2018 | 01 TO 03 | 4 ROOM | 102 sqm | $378,000 | $3,706 |
| Aug 2018 | 01 TO 03 | 5 ROOM | 120 sqm | $476,000 | $3,967 |
| Aug 2018 | 01 TO 03 | 5 ROOM | 120 sqm | $525,000 | $4,375 |
| Apr 2018 | 04 TO 06 | 5 ROOM | 120 sqm | $520,000 | $4,333 |
| Mar 2018 | 04 TO 06 | 4 ROOM | 102 sqm | $403,000 | $3,951 |
| Sep 2017 | 07 TO 09 | 5 ROOM | 120 sqm | $510,000 | $4,250 |
| Jul 2017 | 01 TO 03 | 4 ROOM | 101 sqm | $375,000 | $3,713 |
About Block 509 Serangoon North Avenue 4
Block 509 Serangoon North Avenue 4 is a mature HDB block in Serangoon, built in 1997 with about 70 years remaining on its 99-year lease. At $520,000, its median sits roughly in line with the Serangoon town median. It has a relatively light resale record, with 19 transactions since 2017 across 4 room, 5 room flats priced from $375,000 to $690,000. The most recent transaction was a 4 room flat on storeys 04 TO 06 at $660,000 in Jan 2026, and the median works out to $4,458/sqm. Floor level matters here: units on the higher 04 TO 06 band have sold around 37% above those on the 01 TO 03 band. On Bala's Table, the SLA's leasehold valuation model, its relativity ratio works out to 0.9115, equivalent to roughly 0.34% of lease-value decay a year. All transaction data is sourced from data.gov.sg and updated monthly.
Frequently Asked Questions
How much is an HDB flat at Block 509 Serangoon North Avenue 4 worth?
The most recent resale transaction at Block 509 Serangoon North Avenue 4 was $660,000 for a 4 room flat in 2026-01. The median price per square metre across all flat types is $4,458, based on 19 transactions since January 2017. Data sourced from data.gov.sg.
What is the remaining lease for Block 509 Serangoon North Avenue 4?
Block 509 Serangoon North Avenue 4 was built in 1997 and has approximately 70 years and 6 months remaining on its 99-year lease. Under Bala's Table (the SLA leasehold valuation model), the annual lease decay rate is 0.34%, meaning the leasehold value decreases by approximately 0.34% per year at the current remaining lease.
What flat types are available at Block 509 Serangoon North Avenue 4?
Block 509 Serangoon North Avenue 4 in Serangoon contains 4 room, 5 room flats. Resale prices range from $375,000 to $690,000 based on historical transaction records from data.gov.sg.