Latest Sale
$775,000
2026-06 · 5 Room
How Much Is a Flat at Block 509C Yishun Ave 4 Worth?
4 Room, 5 Room · Built 2018 · 90 years 11 months remaining MOP Cleared
Last updated: 13 Jun 2026
Median $/sqm
$5,752
Based on 25 txns
Total Txns
25
Since data available
5-Yr Trend
—
Insufficient data
What Will You Actually Walk Away With?
Select your flat and storey. We'll calculate your estimated cash in hand, CPF refund, and all deductions — including accrued interest and resale levy.
Flat Type
Storey Band (closest to your floor)
How did you buy?
What are you thinking of buying next?
↑ Please select a storey band above to get your estimate.
Your Estimated Take-Home
—
Cash
—
Yours to spend or invest freely
CPF Refund
—
Back to CPF OA — reusable for your next purchase
Market Value Estimate —
Est. Purchase Price
· Affects CPF accrued interest
−Deductions Breakdown —
Loan Type
Outstanding Loan (est.) —
CPF Principal (est.) —
CPF Accrued Interest (est.) —
+Selling Costs — view details →
Resale Levy
— Agent Commission (2%) —
Experienced agents often recover their fee through a higher sale price.
Conveyancing Lawyer (est.) −$500
Handles legal paperwork — choose HDB lawyer or private conveyancing firm
HDB Legal & Admin Fees
−$460 Transfer, mortgage discharge, title search, registration
Net Proceeds for Upgrade —
Market Demand
📊 Moderate activity — a specialist agent can position your flat to the right buyer.
Based on recent sales data · Updates monthly
Sold at this block (6mo)
3 flats ⚡
AVG. DAYS TO OFFER
~60 days
Transaction density proxy
BUYER DEMAND
5.3 / 10
Block Specialists
Connect with agents who know this block — coming soon.
Block Specialists
Connect with agents who know this block
Specialist 1
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 2
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 3
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
1 / 2
Specialist 1
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 2
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 3
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 4
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 5
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Specialist 6
1,170 transactions in Yishun Ave 4
Highest: $1,120,000
Agent profiles launching soon
Transaction History 25 total
| Date | Floor | Type | sqm | Price | $/sqm |
|---|---|---|---|---|---|
| 2026-06 | 07 TO 09 | 5 Room | 113 | $775,000 | $6,858 |
| 2026-04 | 01 TO 03 | 4 Room | 93 | $575,000 | $6,183 |
| 2026-03 | 10 TO 12 | 5 Room | 113 | $750,000 | $6,637 |
| 2024-08 | 01 TO 03 | 4 Room | 93 | $555,000 | $5,968 |
| 2024-07 | 04 TO 06 | 5 Room | 113 | $706,888 | $6,256 |
| 2024-07 | 10 TO 12 | 4 Room | 93 | $605,000 | $6,505 |
| 2024-03 | 07 TO 09 | 4 Room | 93 | $580,888 | $6,246 |
| 2023-11 | 10 TO 12 | 4 Room | 93 | $560,000 | $6,022 |
| 2023-08 | 01 TO 03 | 5 Room | 113 | $628,000 | $5,558 |
| 2023-06 | 01 TO 03 | 5 Room | 113 | $615,000 | $5,442 |
| 2023-06 | 10 TO 12 | 4 Room | 93 | $565,000 | $6,075 |
| 2023-05 | 07 TO 09 | 4 Room | 93 | $520,000 | $5,591 |
| 2023-02 | 04 TO 06 | 4 Room | 93 | $500,000 | $5,376 |
| 2023-01 | 07 TO 09 | 4 Room | 93 | $520,000 | $5,591 |
| 2022-10 | 13 TO 15 | 4 Room | 93 | $574,000 | $6,172 |
| 2022-07 | 07 TO 09 | 4 Room | 93 | $555,000 | $5,968 |
| 2022-07 | 13 TO 15 | 4 Room | 93 | $530,000 | $5,699 |
| 2022-06 | 01 TO 03 | 4 Room | 93 | $478,000 | $5,140 |
| 2022-06 | 04 TO 06 | 4 Room | 93 | $520,000 | $5,591 |
| 2022-06 | 07 TO 09 | 5 Room | 113 | $650,000 | $5,752 |
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About Block 509C Yishun Ave 4
Flats at Block 509C Yishun Ave 4 have been selling at a median of $6,410/sqm, mainly 4-room flats at $575,000 median, with 2 transactions recorded.
The block is a 14-minute walk from Khatib MRT Station (1094m) and is near Sun Plaza mall (5245m, 64 min walk). It is also near Naval Base Primary School (416m, 5 min walk) and Northland Primary School (918m, 12 min walk).
All data is sourced from data.gov.sg and updated daily.
What's Near Block 509C Yishun Ave 4?
Facilities and transport within a 15-minute walk. Walking times are route-based.
MRT / LRT
KHATIB MRT STATION 1094m · 14 min
Nearby Schools
NAVAL BASE PRIMARY SCHOOL 416m · 5 min
NORTHLAND PRIMARY SCHOOL 918m · 12 min
Community Facilities
Nee Soon South CC (U/C) 813m · 10 min
Other Blocks on Yishun Ave 4
Frequently Asked Questions
How much is a flat at Block 509C Yishun Ave 4?
Based on 25 recorded transactions, the median resale price ranges from $535,000 (4 Room) to $650,000 (5 Room). The most recent sale was $775,000 in 2026-06.
Median by flat type (last 24 months)
Flat Type Most Recent Median
4 Room $575,000
5 Room $750,000
What is my flat worth at Block 509C?
The overall median resale price at Block 509C Yishun Ave 4 is $662,500. Use the calculator above to estimate your equity based on your purchase price.
How much cash will I actually receive when I sell my flat at Block 509C?
Your gross sale proceeds are what the buyer pays. From that, three things are deducted: your outstanding loan, your CPF principal (all CPF savings used for the flat, returned to your CPF OA), and CPF accrued interest (the interest CPF calculates on those savings at 2.5% p.a., compounded annually). What remains after these deductions is your cash in hand. Use the What's Your Flat Worth? calculator above to estimate your actual cash take-home based on Block 509C prices.
What is CPF accrued interest and why does it reduce my sale proceeds?
When you buy a flat using CPF, those funds are considered a loan from your CPF OA to yourself. When you sell, CPF Board requires you to return the principal plus the interest those funds would have earned had they stayed in your OA — currently 2.5% per annum, compounded. This is not a penalty or a fee paid to anyone; the money goes back into your CPF OA. However, it does reduce your cash proceeds — and the longer you have owned the flat, the larger the accrued amount. Use the CPF Accrued Interest Calculator above to estimate your deduction before you decide to sell.
How active is the resale market at Block 509C?
Block 509C has recorded 25 resale transactions — roughly 1.0 sales per month over the past 24 months. The latest transaction closed in 2026-06.
What flat types are available at Block 509C?
Block 509C Yishun Ave 4 has 4 Room, 5 Room units. Median prices range from $535,000 to $650,000.
How much can I unlock to upgrade if I sell my HDB at Block 509C?
Selling to upgrade means planning both timelines and funds. Your proceeds split into cash in hand (for your next downpayment and transition costs) and CPF refund (returned to CPF OA). Use the What's Your Flat Worth? calculator above to estimate the equity you can deploy for your next home.
What is the remaining lease for Block 509C?
Block 509C was built in 2018 with a 99-year lease. It has approximately 90 years 11 months remaining.
Does Block 509C's remaining lease affect its resale value?
At 91 years remaining, lease length is not a meaningful factor for your sale. Buyers can use their full CPF savings and access standard bank financing. Your buyer pool is unrestricted.
When can I sell my flat at Block 509C Yishun Ave 4?
Flats at Block 509C Yishun Ave 4 have cleared their 5-year Minimum Occupation Period (MOP) and are eligible for resale on the open market. You can list your flat now.
How long does it take to sell an HDB flat?
The standard HDB resale process takes approximately 8–12 weeks from granting the Option to Purchase (OTP) to the completion appointment. This includes HDB resale application, HDB valuation, CPF usage approval, and final appointment scheduling.
Can I sell my HDB flat without an agent?
Yes — HDB's resale portal allows you to handle the transaction yourself. However, for owners upgrading to their next home, an experienced agent helps align pricing, buyer negotiation, and completion timing so your next purchase is less exposed to delays. The typical 1–2% commission is often recovered through a stronger sale outcome.
What are the costs of selling an HDB flat?
Typical costs for a seller:
Agent commission ~1–2% of sale price
Legal / conveyancing ~S$500 (HDB) or ~S$2,000 (private)
HDB admin fee S$80
Resale levy S$15,000–S$55,000 (if applicable)
Seller stamp duty None (after MOP)
Total (est.) on $575,000 excl. levy $12,080 to $13,580