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. Across 108 resales on record, 4-Room flats have recently resold around S$965k (S$914 psf, 96 sqm). 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
- Flat model
- Model A
- Market segment
- RCR
- Median resale
- S$965k
- Last transacted
- Jun 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$914 psf), from 108 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 | 80 | S$965,000recent | 96 sqm | S$931 psf |
Live now: 6 flats listed for sale at this block (median asking S$1.05M) and 4 for rent (median S$1,150/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 Jun 2026.
What rent and yield does Block 421 Clementi Ave 1 get?
Flats at Block 421 Clementi Ave 1 have recently sublet for a median of S$3,700/mo, an indicative gross rental yield of about 4.6% (from 24 recent rental contracts).
Median rent
S$3,700/mo
24 recent contracts
Gross rental yield
4.6%
indicative, gross
Annual rent
S$44,400
median × 12 months
| Flat type | Contracts | Median rent |
|---|---|---|
| 4-Room | 24 | S$4,000/mo |
| 3-Room | 14 | S$3,400/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 Mar 2026. Source: HDB rental (subletting) data.
What has recently sold at Block 421 Clementi Ave 1?
Block 421 Clementi Ave 1 has 108 recorded resales; the most recent transacted at S$970,000 in Jun 2026 (HDB caveat data).
| Date | Flat type | Storey | Size | Price |
|---|---|---|---|---|
| Jun 2026 | 4-Room | 22 TO 24 | 96 sqm | S$970,000 |
| 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 |
What flat types are in Block 421 Clementi Ave 1?
Block 421 Clementi Ave 1 has 300 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 Clementi Ave 1?
Block 421 Clementi Ave 1 is an HDB block in Clementi.
Block 421 Clementi Ave 1 is an HDB block located along Clementi Ave 1. The block is recorded as completed around 2012, with up to 40 storeys. It has an estimated 300 residential units based on the HDB property information dataset. Flat types in the block include 3-room and 4-room units.
The address is Block 421 Clementi Ave 1, Singapore 120421. It is part of District 05, Pasir Panjang / Hong Leong Garden / Clementi New Town, the Clementi planning area. The block falls within the West Region and the RCR market segment.
The nearest rail connection is Clementi MRT, approximately 756m away, around 12 minutes on foot. Nearby amenities include West Coast Plaza for shopping, SHENG SIONG SUPERMARKET PTE LTD for groceries, Blk 448 Clementi Ave 3 for food options, Taman Mas Merah Playground for greenery and recreation, Clementi Polyclinic for polyclinic services, and West Coast Community Centre for community facilities.
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.
Wondering whether it will hold its value? See do HDB flats actually make money? →
Eyeing Block 421 Clementi Ave 1? Ask what it's worth.
Recent transacted prices, what's nearby, and whether an asking price is fair.
PropKakiRecent sales at Block 421 Clementi Ave 1 land close to the town median — fair value, no big premium.
Frequently asked questions about Block 421 Clementi Ave 1
How much does a 4-Room flat at Block 421 Clementi Ave 1 cost?⌄
4-Room flats at Block 421 Clementi Ave 1 have recently resold for a median of about S$965k (S$914 psf), from 108 resales on record (HDB caveats). The exact price depends on the flat type, floor and remaining lease.
What are resale prices at Block 421 Clementi Ave 1 by flat type?⌄
3-Room ≈ S$608k; 4-Room ≈ S$965k (median resale, HDB caveats).
Is Block 421 Clementi Ave 1 worth buying given its remaining lease?⌄
Block 421 Clementi Ave 1 has about 86 years left on its 99-year lease (completed 2012). 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 Clementi Ave 1?⌄
Gross rental yield at Block 421 Clementi Ave 1 is about 4.6%, based on a median subletting rent of about S$3,700/mo against a resale price of about S$965k. 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 Clementi Ave 1?⌄
For a flat at about S$965k on a 25-year HDB-style loan, you'd need roughly S$7,693/mo in household income, with repayments around S$3,623/mo after a S$241k downpayment. First-timer grants of up to S$80,000+ (not included) lower the cash needed.
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.