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. 4-Room flats have recently resold around S$505k (104 sqm), from 100 resales on record. The lease has approximately 66 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
- Market segment
- OCR
- Median resale
- S$505k
- Last transacted
- May 2025
- Remaining lease
- ≈ 66 years
What are resale prices at Block 421 Choa Chu Kang Ave 4?
4-Room flats have recently resold around S$505k (S$443 psf), from 100 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 4-Room | 74 | S$435,000recent | 104 sqm | S$389 psf |
| 5-Room | 26 | S$405,000recent | 132 sqm | S$285 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 May 2025.
What has recently sold at Block 421 Choa Chu Kang Ave 4?
Block 421 Choa Chu Kang Ave 4 has 100 recorded resales; the most recent transacted at S$574,888 in May 2025 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| 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 |
| Aug 2019 | 4-Room | 10 TO 12 | 104 sqm | S$360,000 |
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.
Unit stock by flat type, from the HDB property information dataset.
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$505k) needs about S$4,025/mo in income and S$1,896/mo in repayments, after S$9,747 stamp duty and a S$126k downpayment.
Illustrative, for a buyer at the recent median resale price (S$505k) — 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$9,747
BSD, tiered
Downpayment (25%)
S$126k
cash + CPF
Monthly instalment
S$1,896/mo
25y @ 3.5%
Income required
S$4,025/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 421 Choa Chu Kang Ave 4
What is the resale price at Block 421 Choa Chu Kang Ave 4?⌄
4-Room flats at Block 421 Choa Chu Kang Ave 4 have recently resold around S$505k (104 sqm), based on HDB resale caveats. Resale prices vary by flat type, floor and remaining lease.
How much are flats at Block 421 Choa Chu Kang Ave 4 by flat type?⌄
4-Room ≈ S$435k; 5-Room ≈ S$405k. Figures are median resale prices from HDB caveats.
How many years are left on the lease at Block 421 Choa Chu Kang Ave 4?⌄
Block 421 Choa Chu Kang Ave 4 has approximately 66 years left on its 99-year lease (completed 1990). This figure is taken from the most recent transacted flat.
How many units are in Block 421 Choa Chu Kang Ave 4?⌄
Block 421 Choa Chu Kang Ave 4 has 88 dwelling units across up to 12 storeys, mostly 4 room flats.
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.
Is Block 421 Choa Chu Kang Ave 4 a good place to buy an HDB resale flat?⌄
Block 421 Choa Chu Kang Ave 4 sits in Choa Chu Kang, in the Choa Chu Kang planning area. Whether it suits you depends on your budget, the flat type, the remaining lease (≈66 years) and proximity to MRT and schools — all of which are summarised on this page from HDB resale data.
