Block 421 Choa Chu Kang Ave 4
421 Choa Chu Kang Ave 4, Singapore 680421
Block 421 Choa Chu Kang Ave 4 is an HDB block in Choa Chu Kang, completed in 1990, with 88 dwelling units. Across 101 resales on record, 4-Room flats have recently resold around S$510k (S$443 psf, 104 sqm). The lease has approximately 65 years remaining.
What are the key facts about Block 421 Choa Chu Kang Ave 4?
Block 421 Choa Chu Kang Ave 4 is an HDB block in Choa Chu Kang, completed in 1990, with 88 dwelling units.
- Town
- Choa Chu Kang
- Planning area
- Choa Chu Kang
- Completed
- 1990
- Storeys
- 12
- Total units
- 88
- Flat model
- Model A
- Market segment
- OCR
- Median resale
- S$510k
- Last transacted
- Jul 2026
- Remaining lease
- ≈ 65 years
What are resale prices at Block 421 Choa Chu Kang Ave 4?
4-Room flats have recently resold around S$510k (S$443 psf), from 101 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 4-Room | 75 | S$496,000recent | 104 sqm | S$443 psf |
| 5-Room | 26 | S$405,000recent | 132 sqm | S$285 psf |
Live now: 0 flats listed for sale at this block and 4 for rent (median S$3,800/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 Jul 2026.
What rent and yield does Block 421 Choa Chu Kang Ave 4 get?
Flats at Block 421 Choa Chu Kang Ave 4 have recently sublet for a median of S$2,600/mo, an indicative gross rental yield of about 6.1% (from 21 recent rental contracts).
Median rent
S$2,600/mo
21 recent contracts
Gross rental yield
6.1%
indicative, gross
Annual rent
S$31,200
median × 12 months
| Flat type | Contracts | Median rent |
|---|---|---|
| 4-Room | 19 | 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 May 2026. Source: HDB rental (subletting) data.
What has recently sold at Block 421 Choa Chu Kang Ave 4?
Block 421 Choa Chu Kang Ave 4 has 101 recorded resales; the most recent transacted at S$545,000 in Jul 2026 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| Jul 2026 | 4-Room | 04 TO 06 | 104 sqm | S$545,000 |
| May 2025 | 4-Room | 07 TO 09 | 104 sqm | S$574,888 |
| Jul 2024 | 4-Room | 01 TO 03 | 104 sqm | S$525,000 |
| Mar 2024 | 4-Room | 10 TO 12 | 104 sqm | S$532,000 |
| Mar 2024 | 5-Room | 10 TO 12 | 132 sqm | S$620,000 |
| Jan 2024 | 4-Room | 07 TO 09 | 104 sqm | S$504,888 |
| Dec 2023 | 4-Room | 10 TO 12 | 104 sqm | S$510,000 |
| Apr 2023 | 5-Room | 04 TO 06 | 132 sqm | S$630,000 |
| Apr 2023 | 4-Room | 10 TO 12 | 104 sqm | S$496,000 |
| Aug 2021 | 4-Room | 10 TO 12 | 104 sqm | S$435,000 |
| Sept 2020 | 4-Room | 01 TO 03 | 104 sqm | S$300,000 |
| Oct 2019 | 4-Room | 01 TO 03 | 104 sqm | S$315,000 |
What flat types are in Block 421 Choa Chu Kang Ave 4?
Block 421 Choa Chu Kang Ave 4 has 88 units, mostly 4-Room flats of the Model A model.
Unit stock by flat type, from the HDB property information dataset.
Where is Block 421 Choa Chu Kang Ave 4?
Block 421 Choa Chu Kang Ave 4 is an HDB block in Choa Chu Kang.
Block 421 Choa Chu Kang Ave 4 is an HDB block located along Choa Chu Kang Ave 4. The block is recorded as completed around 1990, with up to 12 storeys. It has an estimated 88 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 421 Choa Chu Kang Ave 4, Singapore 680421. It is part of District 23, Hillview / Dairy Farm / Bukit Panjang / Choa Chu Kang, the Choa Chu Kang planning area. The block falls within the West Region and the OCR market segment.
The nearest rail connection is South View LRT, approximately 531m away, around 8 minutes on foot. Nearby amenities include Lot One for shopping, ANG KEN CHUA for groceries, Choa Chu Kang Pk for greenery and recreation, and Keat Hong Community Club for community facilities.
How far is Block 421 Choa Chu Kang Ave 4 from MRT and schools?
The nearest MRT/LRT to Block 421 Choa Chu Kang Ave 4 is South View LRT, about 531 m away (~8 min walk). 5 schools are within 1 km, including 3 primary schools.
Getting around
- South View LRT531 m · ~8 min
- Choa Chu Kang LRT536 m · ~8 min
- Keat Hong LRT989 m · ~15 min
Schools nearby
Flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.
- Bukit Panjang Govt. High SchoolSecondary schoolwithin 1 km270 m
- Chua Chu Kang Primary SchoolPrimary schoolwithin 1 km · P1 priority463 m
- Concord Primary SchoolPrimary schoolwithin 1 km · P1 priority540 m
- South View Primary SchoolPrimary schoolwithin 1 km · P1 priority615 m
- Kranji Secondary SchoolSecondary schoolwithin 1 km921 m
- Teck Whye Primary SchoolPrimary school1.4 km
- De La Salle SchoolPrimary school1.5 km
- Kranji 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 421 Choa Chu Kang Ave 4?
Buying a flat at Block 421 Choa Chu Kang Ave 4 (~S$510k) needs about S$4,066/mo in income and S$1,915/mo in repayments, after S$9,900 stamp duty and a S$128k downpayment.
Illustrative, for a buyer at the recent median resale price (S$510k) — 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$9,900
BSD, tiered
Downpayment (25%)
S$128k
cash + CPF
Monthly instalment
S$1,915/mo
25y @ 3.5%
Income required
S$4,066/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 421 Choa Chu Kang Ave 4? Ask what it's worth.
Recent transacted prices, what's nearby, and whether an asking price is fair.
PropKakiRecent sales at Block 421 Choa Chu Kang Ave 4 land close to the town median — fair value, no big premium.
Frequently asked questions about Block 421 Choa Chu Kang Ave 4
How much does a 4-Room flat at Block 421 Choa Chu Kang Ave 4 cost?⌄
4-Room flats at Block 421 Choa Chu Kang Ave 4 have recently resold for a median of about S$510k (S$443 psf), from 101 resales on record (HDB caveats). The exact price depends on the flat type, floor and remaining lease.
What are resale prices at Block 421 Choa Chu Kang Ave 4 by flat type?⌄
4-Room ≈ S$496k; 5-Room ≈ S$405k (median resale, HDB caveats).
Is Block 421 Choa Chu Kang Ave 4 worth buying given its remaining lease?⌄
Block 421 Choa Chu Kang Ave 4 has about 65 years left on its 99-year lease (completed 1990). 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 421 Choa Chu Kang Ave 4?⌄
Gross rental yield at Block 421 Choa Chu Kang Ave 4 is about 6.1%, based on a median subletting rent of about S$2,600/mo against a resale price of about S$510k. 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 421 Choa Chu Kang Ave 4?⌄
For a flat at about S$510k on a 25-year HDB-style loan, you'd need roughly S$4,066/mo in household income, with repayments around S$1,915/mo after a S$128k downpayment. First-timer grants of up to S$80,000+ (not included) lower the cash needed.
What is the nearest MRT to Block 421 Choa Chu Kang Ave 4?⌄
The nearest MRT/LRT station to Block 421 Choa Chu Kang Ave 4 is South View LRT, about 531 m away (~8 min walk).
Which primary schools are within 1 km of Block 421 Choa Chu Kang Ave 4?⌄
Chua Chu Kang Primary School, Concord Primary School, South View Primary School are within 1 km of Block 421 Choa Chu Kang Ave 4 — flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.