Block 421 Clementi Avenue 1
Block 421 Clementi Avenue 1 has 106 recorded HDB resale transactions since 2017. Latest sale: $970,000 (Jun 2026, 4 room, floors 22–24). Median $8,048/sqm. Prices up 26% over the past five years. Built 2013, 86 years lease remaining.
How this block compares
- 4 Room$972,944+15.8%vs town(+$133k)+54.4%vs national(+$343k)
Median of resales in the 12 months to Jul 2026, compared with town and Singapore medians on the same basis. Flat types with fewer than two sales in the window are omitted.
What this block rents for, and the gross rental yield (annual rent ÷ resale price). Figures are from rentals at this block where available.
| Flat type | Median rent /mo | Gross yield | Based on |
|---|---|---|---|
| 3-Room | $3,000 typically $2,800–$3,200 | 8.4% | Clementi avg · block too thin |
| 4-Room | $4,350 typically $4,050–$4,600 | 5.4% | 6 rentals here |
This block is inside the 1 km Primary 1 priority zone for 2 popular schools. When a school is oversubscribed, MOE ballots by home–school distance, and homes within 1 km are drawn first.
- This home
- School within 1 km
- School 1–2 km
- 1km ring, top priority
- 2km ring, next tier
Straight-line distances, the basis MOE uses for Home–School Distance priority. Tap a school to open it. Map © OneMap, SLA.
Other HDB blocks closest to Block 421 Clementi Avenue 1 in Clementi, with their median resale price. Useful for comparing what a flat here costs against its immediate neighbours.
| Date | Floor | Type | Area | Price | $/sqm |
|---|---|---|---|---|---|
| Jun 2026 | 22 TO 24 | 4 ROOM | 96 sqm | $970,000 | $10,104 |
| May 2026 | 19 TO 21 | 3 ROOM | 73 sqm | $650,000 | $8,904 |
| Apr 2026 | 25 TO 27 | 4 ROOM | 100 sqm | $975,888 | $9,759 |
| Mar 2026 | 19 TO 21 | 4 ROOM | 96 sqm | $985,000 | $10,260 |
| Jan 2026 | 31 TO 33 | 4 ROOM | 96 sqm | $1,038,000 | $10,813 |
| Nov 2025 | 10 TO 12 | 4 ROOM | 100 sqm | $965,000 | $9,650 |
| Nov 2025 | 22 TO 24 | 4 ROOM | 91 sqm | $978,000 | $10,747 |
| Aug 2025 | 10 TO 12 | 4 ROOM | 91 sqm | $942,888 | $10,361 |
| Aug 2025 | 22 TO 24 | 4 ROOM | 100 sqm | $970,000 | $9,700 |
| May 2025 | 25 TO 27 | 4 ROOM | 92 sqm | $965,000 | $10,489 |
| Apr 2025 | 07 TO 09 | 4 ROOM | 100 sqm | $952,488 | $9,525 |
| Mar 2025 | 13 TO 15 | 3 ROOM | 74 sqm | $728,000 | $9,838 |
| Feb 2025 | 04 TO 06 | 4 ROOM | 91 sqm | $850,000 | $9,341 |
| Feb 2025 | 19 TO 21 | 4 ROOM | 92 sqm | $922,000 | $10,022 |
| Feb 2025 | 04 TO 06 | 4 ROOM | 91 sqm | $855,000 | $9,396 |
| Jan 2025 | 25 TO 27 | 3 ROOM | 73 sqm | $720,000 | $9,863 |
| Nov 2024 | 01 TO 03 | 3 ROOM | 73 sqm | $616,888 | $8,451 |
| Jul 2024 | 16 TO 18 | 4 ROOM | 92 sqm | $915,000 | $9,946 |
| Jun 2024 | 01 TO 03 | 4 ROOM | 92 sqm | $755,000 | $8,207 |
| May 2024 | 04 TO 06 | 3 ROOM | 74 sqm | $600,000 | $8,108 |
About Block 421 Clementi Avenue 1
Block 421 Clementi Avenue 1 is a million-dollar HDB block: a flat here has sold for as much as $1,038,000 (Jan 2026), among the rare blocks in Clementi to cross that mark. Its median runs about 62% above the Clementi median, ahead of around 82% of the town's blocks. It has a busy resale history, with 106 transactions since 2017 across 3 room, 4 room flats priced from $448,000 to $1,038,000. The most recent transaction was a 4 room flat on storeys 22 TO 24 at $970,000 in Jun 2026, and the median works out to $8,048/sqm. Higher floors carry a premium, with the 37 TO 39 band trading roughly 42% above the 01 TO 03 band. Over five years, prices here are up about 26%. All transaction data is sourced from data.gov.sg and updated monthly.
Frequently Asked Questions
How much is an HDB flat at Block 421 Clementi Avenue 1 worth?
The most recent resale transaction at Block 421 Clementi Avenue 1 was $970,000 for a 4 room flat in 2026-06. The median price per square metre across all flat types is $8,048, based on 106 transactions since January 2017. Data sourced from data.gov.sg.
What is the remaining lease for Block 421 Clementi Avenue 1?
Block 421 Clementi Avenue 1 was built in 2013 and has approximately 86 years and 4 months remaining on its 99-year lease. Under Bala's Table (the SLA leasehold valuation model), the annual lease decay rate is 0.19%, meaning the leasehold value decreases by approximately 0.19% per year at the current remaining lease.
What flat types are available at Block 421 Clementi Avenue 1?
Block 421 Clementi Avenue 1 in Clementi contains 3 room, 4 room flats. Resale prices range from $448,000 to $1,038,000 based on historical transaction records from data.gov.sg.
Have HDB prices at Block 421 Clementi Avenue 1 gone up or down?
Resale prices at Block 421 Clementi Avenue 1 have increased by approximately 26% over the past five years. The current median price is $724,000, with the most recent sale at $970,000 in 2026-06.