How much is a flat at Blk 509 Serangoon Nth Ave 4 worth?

4 Room: $635,000 median (2 sales in the last 12 months). 5 Room: $690,000 median (1 recorded sale, none in the last 12 months). Medians are quoted per flat type, because a 3-room and a 5-room at the same block are different markets.

What flat types are available at Blk 509 Serangoon Nth Ave 4?

Blk 509 Serangoon Nth Ave 4 has 4 Room, 5 Room flats across 87 units. The lease started in 1997 and has about 70 years left of its 99.

What was the most recent sale at Blk 509 Serangoon Nth Ave 4?

A 4 Room flat, storeys 04 to 06 sold for $660,000 in Jan 2026.

What is the price per square foot at Blk 509 Serangoon Nth Ave 4?

4 Room flats have a median of $584 psf, based on 2 sales in the last 12 months.

How often do flats come up for sale at Blk 509 Serangoon Nth Ave 4?

2 flats changed hands in the last 12 months, about 2.3% of the 87 units in the block. 8 sales are recorded here since Dec 2022.

Blk 509 Serangoon Nth Ave 4

Serangoon5505094 ROOM5 ROOMLease balance: 70 yrs (from 1997)

2 sales in the last 12 months · ~2.3% of 87 units

Sales, last 12 months

8 recorded since Dec 2022

Median price

$635K

4 Room · 2 sales · last 12 months

Median PSF

$584

4 Room · 2 sales · last 12 months

Price range

$610K – $660K

4 Room · 2 sales · last 12 months

Latest sale

$660,000

Jan 2026 · 4 Room · #04-06

Can you use CPF for this flat?

70 years left on the 99, from 1997.

The lease covers you to 95. Full CPF use.

Youngest buyer's age35

Price$635K

CPF OA balance$150K

CPF you can use

the lease covers you to 95, so the only limit is your balance

$127,000

Maximum bank loan

75% of the price, over 25 years

$476,250

Cash you need

at least $31,750 of any purchase must be cash

$31,750

Monthly instalment

25 years at 3.5%

$2,384

CPF 20% Loan 75% Cash 5%

Indicative. Excludes stamp duty, legal fees and CPF accrued interest. Confirm with HDB and your banker. Rules as at 2026-09-17.

Market Insights

Supply

1 unit

1 agent listing

Asking vs sold

-17.3%

$525K ask · $635K sold

4 Room · 2 sold, 1 asking

Price trend

-100%

6 months, 0 sales

12 months: 0% (2)

Turnover

2.3%

2 of 87 units, 12 months

What is my flat worth here?

Resale Price Trend

One flat type at a time, so a single larger sale cannot look like a price jump

Median price per month, 4 Room only, 7 sales

Check your valuation today

Recent Resale Transactions

8 recorded · 2 in the last 12 months • Page 1 of 1

Date	Flat Type	Storey	Area	Price	PSF
2026-01	4 ROOM	04 TO 06	1,087 sqft	$660,000	$607
2025-11	4 ROOM	04 TO 06	1,087 sqft	$610,000	$561
2025-07	4 ROOM	01 TO 03	1,087 sqft	$623,000	$573
2025-06	4 ROOM	07 TO 09	1,098 sqft	$646,888	$589
2024-04	4 ROOM	04 TO 06	1,087 sqft	$600,000	$552
2024-04	5 ROOM	04 TO 06	1,292 sqft	$690,000	$534
2023-01	4 ROOM	04 TO 06	1,098 sqft	$520,000	$474
2022-12	4 ROOM	04 TO 06	1,098 sqft	$520,000	$474