Block 121 Serangoon Nth Ave 1
121 Serangoon Nth Ave 1, Singapore 550121
Block 121 Serangoon Nth Ave 1 is an HDB block in Serangoon, completed in 1984, with 96 dwelling units. Across 110 resales on record, 5-Room flats have recently resold around S$555k (S$426 psf, 121 sqm). The lease has approximately 60 years remaining.
What are the key facts about Block 121 Serangoon Nth Ave 1?
Block 121 Serangoon Nth Ave 1 is an HDB block in Serangoon, completed in 1984, with 96 dwelling units.
- Town
- Serangoon
- Planning area
- Serangoon
- Completed
- 1984
- Storeys
- 13
- Total units
- 96
- Flat model
- Improved · New Generation
- Market segment
- OCR
- Median resale
- S$555k
- Last transacted
- Mar 2025
- Remaining lease
- ≈ 60 years
What are resale prices at Block 121 Serangoon Nth Ave 1?
5-Room flats have recently resold around S$555k (S$426 psf), from 110 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 4-Room | 10 | S$203,000recent | 99 sqm | S$190 psf |
| 5-Room | 100 | S$555,000recent | 121 sqm | S$426 psf |
Live now: 0 flats listed for sale at this block and 10 for rent (median S$850/mo) — 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 Mar 2025.
What rent and yield does Block 121 Serangoon Nth Ave 1 get?
Flats at Block 121 Serangoon Nth Ave 1 have recently sublet for a median of S$2,700/mo, an indicative gross rental yield of about 5.8% (from 14 recent rental contracts).
Median rent
S$2,700/mo
14 recent contracts
Gross rental yield
5.8%
indicative, gross
Annual rent
S$32,400
median × 12 months
| Flat type | Contracts | Median rent |
|---|---|---|
| 5-Room | 14 | S$2,700/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 Jul 2025. Source: HDB rental (subletting) data.
What has recently sold at Block 121 Serangoon Nth Ave 1?
Block 121 Serangoon Nth Ave 1 has 110 recorded resales; the most recent transacted at S$660,000 in Mar 2025 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| Mar 2025 | 5-Room | 01 TO 03 | 121 sqm | S$660,000 |
| Jan 2025 | 5-Room | 07 TO 09 | 125 sqm | S$725,000 |
| Dec 2024 | 5-Room | 10 TO 12 | 121 sqm | S$723,000 |
| Dec 2024 | 5-Room | 10 TO 12 | 123 sqm | S$735,000 |
| May 2023 | 5-Room | 07 TO 09 | 123 sqm | S$648,000 |
| Feb 2023 | 5-Room | 10 TO 12 | 121 sqm | S$650,000 |
| Aug 2022 | 5-Room | 04 TO 06 | 121 sqm | S$555,000 |
| Jun 2021 | 5-Room | 07 TO 09 | 121 sqm | S$528,000 |
| Jul 2020 | 5-Room | 10 TO 12 | 121 sqm | S$490,000 |
| Dec 2019 | 5-Room | 07 TO 09 | 125 sqm | S$483,000 |
| Oct 2019 | 5-Room | 07 TO 09 | 123 sqm | S$490,000 |
| Jul 2019 | 5-Room | 01 TO 03 | 121 sqm | S$433,500 |
What flat types are in Block 121 Serangoon Nth Ave 1?
Block 121 Serangoon Nth Ave 1 has 96 units, mostly 5-Room flats of the Improved / New Generation model.
Unit stock by flat type, from the HDB property information dataset.
Where is Block 121 Serangoon Nth Ave 1?
Block 121 Serangoon Nth Ave 1 is an HDB block in Serangoon.
Block 121 Serangoon Nth Ave 1 is an HDB block located along Serangoon Nth Ave 1. The block is recorded as completed around 1984, with up to 13 storeys. It has an estimated 96 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 121 Serangoon Nth Ave 1, Singapore 550121. 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, NTUC Fairprice Co-operative Ltd for groceries, Chomp Chomp Food Centre for food options, Parry Rd Pg for greenery and recreation, and The Serangoon Community Club for community facilities.
How far is Block 121 Serangoon Nth Ave 1 from MRT and schools?
5 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.
- Serangoon Garden Secondary SchoolSecondary schoolwithin 1 km348 m
- Zhonghua Primary SchoolPrimary schoolwithin 1 km · P1 priority768 m
- Rosyth SchoolPrimary schoolwithin 1 km · P1 priority781 m
- Bowen Secondary SchoolSecondary schoolwithin 1 km805 m
- Peicai Secondary SchoolSecondary schoolwithin 1 km837 m
- Chij Our Lady Of Good CounselPrimary school1.3 km
- Xinmin Primary SchoolPrimary school1.4 km
- Xinmin Secondary SchoolSecondary school1.4 km
Shops, food & parks
Straight-line distances from the block. Source: PropKaki amenities data.
What does it cost to buy a flat at Block 121 Serangoon Nth Ave 1?
Buying a flat at Block 121 Serangoon Nth Ave 1 (~S$555k) needs about S$4,424/mo in income and S$2,084/mo in repayments, after S$11,250 stamp duty and a S$139k downpayment.
Illustrative, for a buyer at the recent median resale price (S$555k) — 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$11,250
BSD, tiered
Downpayment (25%)
S$139k
cash + CPF
Monthly instalment
S$2,084/mo
25y @ 3.5%
Income required
S$4,424/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 121 Serangoon Nth Ave 1? Ask what it's worth.
Recent transacted prices, what's nearby, and whether an asking price is fair.
PropKakiRecent sales at Block 121 Serangoon Nth Ave 1 land close to the town median — fair value, no big premium.
Frequently asked questions about Block 121 Serangoon Nth Ave 1
How much does a 5-Room flat at Block 121 Serangoon Nth Ave 1 cost?⌄
5-Room flats at Block 121 Serangoon Nth Ave 1 have recently resold for a median of about S$555k (S$426 psf), from 110 resales on record (HDB caveats). The exact price depends on the flat type, floor and remaining lease.
What are resale prices at Block 121 Serangoon Nth Ave 1 by flat type?⌄
4-Room ≈ S$203k; 5-Room ≈ S$555k (median resale, HDB caveats).
Is Block 121 Serangoon Nth Ave 1 worth buying given its remaining lease?⌄
Block 121 Serangoon Nth Ave 1 has about 60 years left on its 99-year lease (completed 1984). 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 121 Serangoon Nth Ave 1?⌄
Gross rental yield at Block 121 Serangoon Nth Ave 1 is about 5.8%, based on a median subletting rent of about S$2,700/mo against a resale price of about S$555k. 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 121 Serangoon Nth Ave 1?⌄
For a flat at about S$555k on a 25-year HDB-style loan, you'd need roughly S$4,424/mo in household income, with repayments around S$2,084/mo after a S$139k 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 121 Serangoon Nth Ave 1?⌄
Zhonghua Primary School, Rosyth School are within 1 km of Block 121 Serangoon Nth Ave 1 — flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.