Skip to content

Block 121 Serangoon North Avenue 1

5 Room · Built 1985 · 59 years remaining lease MOP Cleared
Latest Sale
$660,000
Mar 2025 · 5 ROOM · Floor 01-03
Median $/sqm
$4,248
Based on 16 transactions
Total Transactions
16
Since Jan 2017
5-Year Trend
▲ +31.2%
Median price change
Median Price ?
Top 54%
#122 / 227 Top 54%
Latest Sale ?
Top 52%
#119 / 227 Top 52%
Value ($/sqm) ?
Top 90%
#205 / 227 Top 90%
5-Year Growth ?
Top 67%
#101 / 150 Top 67%
Price Trend
Source: HDB Resale Flat Prices, data.gov.sg. Updated monthly.
What's Your Unit Worth?
HDB records transactions in 3-storey bands (e.g. 01 TO 03). Pick the band closest to your floor.
Estimated Market Value
--
Future Value Projection
Market Appreciation
+5.6%/yr
vs
Lease Decay
−0.52%/yr
Growth assumption
Based on this block’s +31.2% growth over 5 years
Estimated value in --
--
Market appreciation --
Lease decay --
Net effect --
Projection uses Bala's Table (SLA leasehold model) for lease decay and your selected growth rate for appreciation. Lease decay is non-linear and accelerates as remaining lease shortens. Past growth does not guarantee future performance. Not financial advice.
Lease Decay Projection
0 years 59 years remaining 99 years
59 years 6 months
Remaining lease
↓ 0.52%/yr
Annual lease decay (Bala's Table)
Based on Bala's Table (SLA leasehold relativity model). At 59 years remaining, decay is gradual (~0.52%/yr). It accelerates significantly below 40 years. Market appreciation (historically 2-4%/yr) currently outpaces lease decay for this block.
All Transactions
Date Floor Type Area Price $/sqm
Mar 2025 01 TO 03 5 ROOM 121 sqm $660,000 $5,455
Jan 2025 07 TO 09 5 ROOM 125 sqm $725,000 $5,800
Dec 2024 10 TO 12 5 ROOM 121 sqm $723,000 $5,975
Dec 2024 10 TO 12 5 ROOM 123 sqm $735,000 $5,976
May 2023 07 TO 09 5 ROOM 123 sqm $648,000 $5,268
Feb 2023 10 TO 12 5 ROOM 121 sqm $650,000 $5,372
Aug 2022 04 TO 06 5 ROOM 121 sqm $555,000 $4,587
Jun 2021 07 TO 09 5 ROOM 121 sqm $528,000 $4,364
Jul 2020 10 TO 12 5 ROOM 121 sqm $490,000 $4,050
Dec 2019 07 TO 09 5 ROOM 125 sqm $483,000 $3,864
Oct 2019 07 TO 09 5 ROOM 123 sqm $490,000 $3,984
Jul 2019 01 TO 03 5 ROOM 121 sqm $433,500 $3,583
Sep 2018 07 TO 09 5 ROOM 121 sqm $472,000 $3,901
Aug 2018 01 TO 03 5 ROOM 121 sqm $398,000 $3,289
Jun 2018 10 TO 12 5 ROOM 121 sqm $500,000 $4,132
Jul 2017 07 TO 09 5 ROOM 125 sqm $500,000 $4,000
Showing 16 of 16 transactions
Source: HDB Resale Flat Prices, data.gov.sg (Singapore Open Data Licence).

About Block 121 Serangoon North Avenue 1

Block 121 at Serangoon North Avenue 1 is a residential HDB block in Serangoon, Singapore, built in 1985 with approximately 59 years remaining on its 99-year lease. The block contains 5 room flats, with resale prices ranging from $398,000 to $735,000 based on 16 recorded transactions since January 2017. The most recent transaction was a 5 room flat on storeys 01 TO 03 sold for $660,000 in 2025-03. The current median price per square metre is $4,248. Over the past five years, resale prices at this block have increased by approximately 31.2%. Under Bala's Table (the Singapore Land Authority's official leasehold valuation model), the block's leasehold relativity ratio is 0.8709, with an annual lease decay rate of approximately 0.52%. All transaction data is sourced from Singapore's data.gov.sg open data platform and is updated monthly.

Frequently Asked Questions

How much is an HDB flat at Block 121 Serangoon North Avenue 1 worth?

The most recent resale transaction at Block 121 Serangoon North Avenue 1 was $660,000 for a 5 room flat in 2025-03. The median price per square metre across all flat types is $4,248, based on 16 transactions since January 2017. Data sourced from data.gov.sg.

What is the remaining lease for Block 121 Serangoon North Avenue 1?

Block 121 Serangoon North Avenue 1 was built in 1985 and has approximately 59 years and 6 months remaining on its 99-year lease. Under Bala's Table (the SLA leasehold valuation model), the annual lease decay rate is 0.52%, meaning the leasehold value decreases by approximately 0.52% per year at the current remaining lease.

What flat types are available at Block 121 Serangoon North Avenue 1?

Block 121 Serangoon North Avenue 1 in Serangoon contains 5 room flats. Resale prices range from $398,000 to $735,000 based on historical transaction records from data.gov.sg.

Have HDB prices at Block 121 Serangoon North Avenue 1 gone up or down?

Resale prices at Block 121 Serangoon North Avenue 1 have increased by approximately 31.2% over the past five years. The current median price is $514,000, with the most recent sale at $660,000 in 2025-03.

Link copied to clipboard