Block 509 Serangoon Nth Ave 4
509 Serangoon Nth Ave 4, Singapore 550509
Block 509 Serangoon Nth Ave 4 is an HDB block in Serangoon, completed in 1996, with 87 dwelling units. 4-Room flats have recently resold around S$540k (102 sqm), from 82 resales on record. The lease has approximately 71 years remaining.
What are the key facts about Block 509 Serangoon Nth Ave 4?
Block 509 Serangoon Nth Ave 4 is an HDB block in Serangoon, completed in 1996, with 87 dwelling units.
- Town
- Serangoon
- Planning area
- Serangoon
- Completed
- 1996
- Storeys
- 8
- Total units
- 87
- Market segment
- OCR
- Median resale
- S$540k
- Last transacted
- Jan 2026
- Remaining lease
- ≈ 71 years
What are resale prices at Block 509 Serangoon Nth Ave 4?
4-Room flats have recently resold around S$540k (S$474 psf), from 82 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 4-Room | 64 | S$520,000recent | 102 sqm | S$474 psf |
| 5-Room | 18 | S$520,000recent | 120 sqm | S$403 psf |
“Recent” medians use the latest transactions; for older blocks the all-time median spans 30+ years and understates today’s price. Source: HDB resale caveats, through Jan 2026.
What has recently sold at Block 509 Serangoon Nth Ave 4?
Block 509 Serangoon Nth Ave 4 has 82 recorded resales; the most recent transacted at S$660,000 in Jan 2026 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| Jan 2026 | 4-Room | 04 TO 06 | 101 sqm | S$660,000 |
| Nov 2025 | 4-Room | 04 TO 06 | 101 sqm | S$610,000 |
| Jul 2025 | 4-Room | 01 TO 03 | 101 sqm | S$623,000 |
| Jun 2025 | 4-Room | 07 TO 09 | 102 sqm | S$646,888 |
| Apr 2024 | 4-Room | 04 TO 06 | 101 sqm | S$600,000 |
| Apr 2024 | 5-Room | 04 TO 06 | 120 sqm | S$690,000 |
| Jan 2023 | 4-Room | 04 TO 06 | 102 sqm | S$520,000 |
| Dec 2022 | 4-Room | 04 TO 06 | 102 sqm | S$520,000 |
| Jan 2021 | 5-Room | 04 TO 06 | 120 sqm | S$535,000 |
| Mar 2020 | 4-Room | 01 TO 03 | 102 sqm | S$380,000 |
| Jan 2020 | 5-Room | 04 TO 06 | 119 sqm | S$540,000 |
| Mar 2019 | 4-Room | 04 TO 06 | 101 sqm | S$400,000 |
What flat types are in Block 509 Serangoon Nth Ave 4?
Block 509 Serangoon Nth Ave 4 has 87 units, mostly 4-Room flats.
Unit stock by flat type, from the HDB property information dataset.
How far is Block 509 Serangoon Nth Ave 4 from MRT and schools?
7 schools are within 1 km, including 3 primary schools.
Schools nearby
Flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.
- Rosyth SchoolPrimary schoolwithin 1 km · P1 priority178 m
- Bowen Secondary SchoolSecondary schoolwithin 1 km232 m
- Xinmin Secondary SchoolSecondary schoolwithin 1 km760 m
- Xinmin Primary SchoolPrimary schoolwithin 1 km · P1 priority761 m
- Hougang Primary SchoolPrimary schoolwithin 1 km · P1 priority793 m
- Serangoon Garden Secondary SchoolSecondary schoolwithin 1 km827 m
- Hougang Secondary SchoolSecondary schoolwithin 1 km946 m
- Yio Chu Kang Primary SchoolPrimary school1.2 km
Shops, food & parks
Straight-line distances from the block. Source: PropKaki amenities data.
What does it cost to buy a flat at Block 509 Serangoon Nth Ave 4?
Buying a flat at Block 509 Serangoon Nth Ave 4 (~S$540k) needs about S$4,305/mo in income and S$2,028/mo in repayments, after S$10,800 stamp duty and a S$135k downpayment.
Illustrative, for a buyer at the recent median resale price (S$540k) — 25% downpayment (bank-loan basis), 25-year loan at 3.5% p.a. Rates as of May 2026. Run it for your own profile →
Buyer's Stamp Duty
S$10,800
BSD, tiered
Downpayment (25%)
S$135k
cash + CPF
Monthly instalment
S$2,028/mo
25y @ 3.5%
Income required
S$4,305/mo
MSR/TDSR @ stress rate
First-time HDB buyers pay no Additional Buyer’s Stamp Duty (ABSD) and may qualify for CPF Housing Grants of up to S$80,000+, which lower the cash required — these are not included above. An HDB concessionary loan also allows a smaller downpayment.
Frequently asked questions about Block 509 Serangoon Nth Ave 4
What is the resale price at Block 509 Serangoon Nth Ave 4?⌄
4-Room flats at Block 509 Serangoon Nth Ave 4 have recently resold around S$540k (102 sqm), based on HDB resale caveats. Resale prices vary by flat type, floor and remaining lease.
How much are flats at Block 509 Serangoon Nth Ave 4 by flat type?⌄
4-Room ≈ S$520k; 5-Room ≈ S$520k. Figures are median resale prices from HDB caveats.
How many years are left on the lease at Block 509 Serangoon Nth Ave 4?⌄
Block 509 Serangoon Nth Ave 4 has approximately 71 years left on its 99-year lease (completed 1996). This figure is taken from the most recent transacted flat.
How many units are in Block 509 Serangoon Nth Ave 4?⌄
Block 509 Serangoon Nth Ave 4 has 87 dwelling units across up to 8 storeys, mostly 4 room flats.
Which primary schools are within 1 km of Block 509 Serangoon Nth Ave 4?⌄
Rosyth School, Xinmin Primary School, Hougang Primary School are within 1 km of Block 509 Serangoon Nth Ave 4 — flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.
Is Block 509 Serangoon Nth Ave 4 a good place to buy an HDB resale flat?⌄
Block 509 Serangoon Nth Ave 4 sits in Serangoon, in the Serangoon planning area. Whether it suits you depends on your budget, the flat type, the remaining lease (≈71 years) and proximity to MRT and schools — all of which are summarised on this page from HDB resale data.
