Block 421 Clementi Ave 1
421 Clementi Ave 1, Singapore 120421
Block 421 Clementi Ave 1 is an HDB block in Clementi, completed in 2012, with 300 dwelling units. 4-Room flats have recently resold around S$965k (92 sqm), from 107 resales on record. The lease has approximately 86 years remaining.
What are the key facts about Block 421 Clementi Ave 1?
Block 421 Clementi Ave 1 is an HDB block in Clementi, completed in 2012, with 300 dwelling units.
- Town
- Clementi
- Planning area
- Clementi
- Completed
- 2012
- Storeys
- 40
- Total units
- 300
- Market segment
- RCR
- Median resale
- S$965k
- Last transacted
- May 2026
- Remaining lease
- ≈ 86 years
What are resale prices at Block 421 Clementi Ave 1?
4-Room flats have recently resold around S$965k (S$907 psf), from 107 resales on record (HDB caveat data).
| Flat type | Resales | Median price | Size | PSF |
|---|---|---|---|---|
| 3-Room | 28 | S$608,000recent | 74 sqm | S$774 psf |
| 4-Room | 79 | S$965,000recent | 96 sqm | S$907 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 2026.
What has recently sold at Block 421 Clementi Ave 1?
Block 421 Clementi Ave 1 has 107 recorded resales; the most recent transacted at S$650,000 in May 2026 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| May 2026 | 3-Room | 19 TO 21 | 73 sqm | S$650,000 |
| Apr 2026 | 4-Room | 25 TO 27 | 100 sqm | S$975,888 |
| Mar 2026 | 4-Room | 19 TO 21 | 96 sqm | S$985,000 |
| Jan 2026 | 4-Room | 31 TO 33 | 96 sqm | S$1,038,000 |
| Nov 2025 | 4-Room | 10 TO 12 | 100 sqm | S$965,000 |
| Nov 2025 | 4-Room | 22 TO 24 | 91 sqm | S$978,000 |
| Aug 2025 | 4-Room | 22 TO 24 | 100 sqm | S$970,000 |
| Aug 2025 | 4-Room | 10 TO 12 | 91 sqm | S$942,888 |
| May 2025 | 4-Room | 25 TO 27 | 92 sqm | S$965,000 |
| Apr 2025 | 4-Room | 07 TO 09 | 100 sqm | S$952,488 |
| Mar 2025 | 3-Room | 13 TO 15 | 74 sqm | S$728,000 |
| Feb 2025 | 4-Room | 04 TO 06 | 91 sqm | S$855,000 |
What flat types are in Block 421 Clementi Ave 1?
Block 421 Clementi Ave 1 has 300 units, mostly 4-Room flats.
Unit stock by flat type, from the HDB property information dataset.
How far is Block 421 Clementi Ave 1 from MRT and schools?
The nearest MRT/LRT to Block 421 Clementi Ave 1 is Clementi MRT, about 756 m away (~12 min walk). 7 schools are within 1 km, including 2 primary schools.
Getting around
- Clementi MRT756 m · ~12 min
Schools nearby
Flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.
- Nan Hua High SchoolSecondary schoolwithin 1 km114 m
- Nus High School Of Mathematics And ScienceMixed-level schoolwithin 1 km398 m
- New Town Secondary SchoolSecondary schoolwithin 1 km543 m
- School Of Science And Technology, SingaporeSecondary schoolwithin 1 km759 m
- Pei Tong Primary SchoolPrimary schoolwithin 1 km · P1 priority794 m
- Clementi Primary SchoolPrimary schoolwithin 1 km · P1 priority881 m
- Kent Ridge Secondary SchoolSecondary schoolwithin 1 km956 m
- Clementi Town Secondary SchoolSecondary school1.0 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 Clementi Ave 1?
Buying a flat at Block 421 Clementi Ave 1 (~S$965k) needs about S$7,693/mo in income and S$3,623/mo in repayments, after S$23,550 stamp duty and a S$241k downpayment.
Illustrative, for a buyer at the recent median resale price (S$965k) — 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$23,550
BSD, tiered
Downpayment (25%)
S$241k
cash + CPF
Monthly instalment
S$3,623/mo
25y @ 3.5%
Income required
S$7,693/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 Clementi Ave 1
What is the resale price at Block 421 Clementi Ave 1?⌄
4-Room flats at Block 421 Clementi Ave 1 have recently resold around S$965k (92 sqm), based on HDB resale caveats. Resale prices vary by flat type, floor and remaining lease.
How much are flats at Block 421 Clementi Ave 1 by flat type?⌄
3-Room ≈ S$608k; 4-Room ≈ S$965k. Figures are median resale prices from HDB caveats.
How many years are left on the lease at Block 421 Clementi Ave 1?⌄
Block 421 Clementi Ave 1 has approximately 86 years left on its 99-year lease (completed 2012). This figure is taken from the most recent transacted flat.
How many units are in Block 421 Clementi Ave 1?⌄
Block 421 Clementi Ave 1 has 300 dwelling units across up to 40 storeys, mostly 4 room flats.
What is the nearest MRT to Block 421 Clementi Ave 1?⌄
The nearest MRT/LRT station to Block 421 Clementi Ave 1 is Clementi MRT, about 756 m away (~12 min walk).
Which primary schools are within 1 km of Block 421 Clementi Ave 1?⌄
Pei Tong Primary School, Clementi Primary School are within 1 km of Block 421 Clementi Ave 1 — flats within 1 km of a primary school qualify for Primary 1 (P1) registration priority.
Is Block 421 Clementi Ave 1 a good place to buy an HDB resale flat?⌄
Block 421 Clementi Ave 1 sits in Clementi, in the Clementi planning area. Whether it suits you depends on your budget, the flat type, the remaining lease (≈86 years) and proximity to MRT and schools — all of which are summarised on this page from HDB resale data.
