Block 521 Serangoon Nth Ave 4
521 Serangoon Nth Ave 4, Singapore 550521
Block 521 Serangoon Nth Ave 4 is an HDB block in Serangoon, completed in 1991, with 77 dwelling units. Across 88 resales on record, 4-Room flats have recently resold around S$443k (S$381 psf, 106 sqm). The lease has approximately 68 years remaining.
What are the key facts about Block 521 Serangoon Nth Ave 4?
Block 521 Serangoon Nth Ave 4 is an HDB block in Serangoon, completed in 1991, with 77 dwelling units.
- Town
- Serangoon
- Planning area
- Serangoon
- Completed
- 1991
- Storeys
- 12
- Total units
- 77
- Flat model
- Model A · Improved
- Market segment
- OCR
- Median resale
- S$443k
- Last transacted
- Aug 2023
- Remaining lease
- ≈ 68 years
What are resale prices at Block 521 Serangoon Nth Ave 4?
4-Room flats have recently resold around S$443k (S$381 psf), from 88 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 4-Room | 63 | S$420,000recent | 106 sqm | S$368 psf |
| 5-Room | 25 | S$485,000recent | 122 sqm | S$366 psf |
Live now: 3 flats listed for sale at this block (median asking S$680k) — 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 Aug 2023.
What rent and yield does Block 521 Serangoon Nth Ave 4 get?
Flats at Block 521 Serangoon Nth Ave 4 have recently sublet for a median of S$2,000/mo, an indicative gross rental yield of about 5.4% (from 4 recent rental contracts).
Median rent
S$2,000/mo
4 recent contracts
Gross rental yield
5.4%
indicative, gross
Annual rent
S$24,000
median × 12 months
| Flat type | Contracts | Median rent |
|---|---|---|
| 4-Room | 3 | S$2,000/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 Sept 2024. Source: HDB rental (subletting) data.
What has recently sold at Block 521 Serangoon Nth Ave 4?
Block 521 Serangoon Nth Ave 4 has 88 recorded resales; the most recent transacted at S$558,000 in Aug 2023 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| Aug 2023 | 4-Room | 04 TO 06 | 106 sqm | S$558,000 |
| May 2023 | 4-Room | 04 TO 06 | 106 sqm | S$530,000 |
| Apr 2022 | 4-Room | 01 TO 03 | 106 sqm | S$410,000 |
| Apr 2022 | 4-Room | 01 TO 03 | 103 sqm | S$463,000 |
| Jan 2022 | 4-Room | 01 TO 03 | 103 sqm | S$465,000 |
| Jun 2021 | 4-Room | 10 TO 12 | 106 sqm | S$480,000 |
| Apr 2021 | 4-Room | 04 TO 06 | 106 sqm | S$410,000 |
| Jan 2020 | 4-Room | 01 TO 03 | 106 sqm | S$385,000 |
| Feb 2019 | 4-Room | 07 TO 09 | 106 sqm | S$438,000 |
| Feb 2019 | 4-Room | 01 TO 03 | 106 sqm | S$330,000 |
| Apr 2018 | 5-Room | 10 TO 12 | 122 sqm | S$500,000 |
| Mar 2018 | 5-Room | 01 TO 03 | 123 sqm | S$443,000 |
What flat types are in Block 521 Serangoon Nth Ave 4?
Block 521 Serangoon Nth Ave 4 has 77 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 521 Serangoon Nth Ave 4?
Block 521 Serangoon Nth Ave 4 is an HDB block in Serangoon.
Block 521 Serangoon Nth Ave 4 is an HDB block located along Serangoon Nth Ave 4. The block is recorded as completed around 1991, with up to 12 storeys. It has an estimated 77 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 521 Serangoon Nth Ave 4, Singapore 550521. 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, PRIME SUPERMARKET (1996) PTE LTD for groceries, Ang Mo Kio Linear Pk (Plot 2) for greenery and recreation, and Hwi Yoh Community Centre for community facilities.
How far is Block 521 Serangoon Nth Ave 4 from MRT and schools?
4 schools are within 1 km, including 2 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 priority202 m
- Bowen Secondary SchoolSecondary schoolwithin 1 km593 m
- Serangoon Garden Secondary SchoolSecondary schoolwithin 1 km629 m
- Hougang Primary SchoolPrimary schoolwithin 1 km · P1 priority953 m
- Xinmin Secondary SchoolSecondary school1.1 km
- Xinmin Primary SchoolPrimary school1.1 km
- Hougang Secondary SchoolSecondary school1.1 km
- Yio Chu Kang Primary SchoolPrimary school1.5 km
Shops, food & parks
Straight-line distances from the block. Source: PropKaki amenities data.
What does it cost to buy a flat at Block 521 Serangoon Nth Ave 4?
Buying a flat at Block 521 Serangoon Nth Ave 4 (~S$443k) needs about S$3,531/mo in income and S$1,663/mo in repayments, after S$7,890 stamp duty and a S$111k downpayment.
Illustrative, for a buyer at the recent median resale price (S$443k) — 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$7,890
BSD, tiered
Downpayment (25%)
S$111k
cash + CPF
Monthly instalment
S$1,663/mo
25y @ 3.5%
Income required
S$3,531/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 521 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 521 Serangoon Nth Ave 4 land close to the town median — fair value, no big premium.
Frequently asked questions about Block 521 Serangoon Nth Ave 4
How much does a 4-Room flat at Block 521 Serangoon Nth Ave 4 cost?⌄
4-Room flats at Block 521 Serangoon Nth Ave 4 have recently resold for a median of about S$443k (S$381 psf), from 88 resales on record (HDB caveats). The exact price depends on the flat type, floor and remaining lease.
What are resale prices at Block 521 Serangoon Nth Ave 4 by flat type?⌄
4-Room ≈ S$420k; 5-Room ≈ S$485k (median resale, HDB caveats).
Is Block 521 Serangoon Nth Ave 4 worth buying given its remaining lease?⌄
Block 521 Serangoon Nth Ave 4 has about 68 years left on its 99-year lease (completed 1991). 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 521 Serangoon Nth Ave 4?⌄
Gross rental yield at Block 521 Serangoon Nth Ave 4 is about 5.4%, based on a median subletting rent of about S$2,000/mo against a resale price of about S$443k. 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 521 Serangoon Nth Ave 4?⌄
For a flat at about S$443k on a 25-year HDB-style loan, you'd need roughly S$3,531/mo in household income, with repayments around S$1,663/mo after a S$111k 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 521 Serangoon Nth Ave 4?⌄
Rosyth School, Hougang Primary School are within 1 km of Block 521 Serangoon Nth Ave 4 — flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.