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. Across 82 resales on record, 4-Room flats have recently resold around S$540k (S$474 psf, 102 sqm). 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
- Flat model
- Model A · Improved
- 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 |
Live now: 3 flats listed for sale at this block (median asking S$598k) and 1 for rent — search all listings.
“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 rent and yield does Block 509 Serangoon Nth Ave 4 get?
Flats at Block 509 Serangoon Nth Ave 4 have recently sublet for a median of S$3,200/mo, an indicative gross rental yield of about 7.1% (from 15 recent rental contracts).
Median rent
S$3,200/mo
15 recent contracts
Gross rental yield
7.1%
indicative, gross
Annual rent
S$38,400
median × 12 months
| Flat type | Contracts | Median rent |
|---|---|---|
| 4-Room | 9 | S$3,250/mo |
| 5-Room | 6 | S$2,600/mo |
HDB subletting requires the flat owner to have met the 5-year Minimum Occupation Period (MOP), so the rental sample per block is small — treat the yield as indicative. Latest contract Apr 2026. Source: HDB rental (subletting) data.
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 of the Model A / Improved model.
Unit stock by flat type, from the HDB property information dataset.
Where is Block 509 Serangoon Nth Ave 4?
Block 509 Serangoon Nth Ave 4 is an HDB block in Serangoon.
Block 509 Serangoon Nth Ave 4 is an HDB block located along Serangoon Nth Ave 4. The block is recorded as completed around 1996, with up to 8 storeys. It has an estimated 87 residential units based on the HDB property information dataset. Flat types in the block include 4-room and 5-room units.
The address is Block 509 Serangoon Nth Ave 4, Singapore 550509. It is part of District 19, Serangoon Garden / Hougang / Punggol, the Serangoon planning area. The block falls within the North-East Region and the OCR market segment.
Nearby amenities include Hougang 1 for shopping, ANG MO SUPERMARKET PTE LTD for groceries, Ci Yuan Hawker Centre for food options, Pk Villas Terrace Pg for greenery and recreation, and The Serangoon Community Club for community facilities.
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.
Wondering whether it will hold its value? See do HDB flats actually make money? →
Eyeing Block 509 Serangoon Nth Ave 4? Ask what it's worth.
Recent transacted prices, what's nearby, and whether an asking price is fair.
PropKakiRecent sales at Block 509 Serangoon Nth Ave 4 land close to the town median — fair value, no big premium.
Frequently asked questions about Block 509 Serangoon Nth Ave 4
How much does a 4-Room flat at Block 509 Serangoon Nth Ave 4 cost?⌄
4-Room flats at Block 509 Serangoon Nth Ave 4 have recently resold for a median of about S$540k (S$474 psf), from 82 resales on record (HDB caveats). The exact price depends on the flat type, floor and remaining lease.
What are resale prices at Block 509 Serangoon Nth Ave 4 by flat type?⌄
4-Room ≈ S$520k; 5-Room ≈ S$520k (median resale, HDB caveats).
Is Block 509 Serangoon Nth Ave 4 worth buying given its remaining lease?⌄
Block 509 Serangoon Nth Ave 4 has about 71 years left on its 99-year lease (completed 1996). That's a long runway, so CPF usage and bank financing are generally unrestricted. The figure is taken from the most recent transacted flat.
What is the rental yield at Block 509 Serangoon Nth Ave 4?⌄
Gross rental yield at Block 509 Serangoon Nth Ave 4 is about 7.1%, based on a median subletting rent of about S$3,200/mo against a resale price of about S$540k. HDB subletting requires the owner to have met the 5-year MOP, so the per-block sample is small — treat this as indicative.
How much do I need to earn to buy a flat at Block 509 Serangoon Nth Ave 4?⌄
For a flat at about S$540k on a 25-year HDB-style loan, you'd need roughly S$4,305/mo in household income, with repayments around S$2,028/mo after a S$135k downpayment. First-timer grants of up to S$80,000+ (not included) lower the cash needed.
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.