16 flats in Blk 509B Yishun Ave 4 were resold in the last 3 years (7 in the last 12 months). The most traded type is the 4-room, with a median of $570,000, 4% above the Yishun median of $550,000. The latest resale was a 5-room on floors 10–12 for $782,000 in Aug 2026. The lease started in 2018, so about 91 years are left. The block is about 890 m from Khatib MRT (straight-line).
| Flat type | Resales | Median price | Median $psf | Range | Yishun median | Median rent (Q2 2026) |
|---|---|---|---|---|---|---|
| 4-room | 10 | $570,000 last 12 months | $569 | $560,000 – $650,000 | $550,000 +4% vs town | $3,100/mth |
| 5-room | 6 | $743,000 last 12 months | $611 | $680,000 – $782,000 | $690,000 +8% vs town | $3,500/mth |
Block medians use the last 12 months where available, otherwise 3 years. Town medians: last 12 months. Rent: Yishun median for whole-flat rentals.
| Month | Flat type | Floors | Size | Model | Price | $psf |
|---|---|---|---|---|---|---|
| Aug 2026 | 5-room | 10–12 | 113 sqm 1,216 sqft | Improved | $782,000 | $643 |
| Apr 2026 | 4-room | 04–06 | 93 sqm 1,001 sqft | Model A | $560,000 | $559 |
| Mar 2026 | 4-room | 10–12 | 93 sqm 1,001 sqft | Model A | $650,000 | $649 |
| Mar 2026 | 5-room | 07–09 | 113 sqm 1,216 sqft | Improved | $743,000 | $611 |
| Feb 2026 | 4-room | 01–03 | 93 sqm 1,001 sqft | Model A | $570,000 | $569 |
| Dec 2025 | 4-room | 01–03 | 93 sqm 1,001 sqft | Model A | $570,000 | $569 |
| Nov 2025 | 5-room | 04–06 | 113 sqm 1,216 sqft | Improved | $690,000 | $567 |
| Oct 2025 | 5-room | 04–06 | 113 sqm 1,216 sqft | Improved | $680,000 | $559 |
| Sep 2025 | 5-room | 04–06 | 113 sqm 1,216 sqft | Improved | $708,000 | $582 |
| Aug 2025 | 4-room | 04–06 | 93 sqm 1,001 sqft | Model A | $612,000 | $611 |
| Jan 2025 | 4-room | 04–06 | 93 sqm 1,001 sqft | Model A | $611,000 | $610 |
| Aug 2024 | 4-room | 10–12 | 93 sqm 1,001 sqft | Model A | $600,000 | $599 |
| Aug 2024 | 5-room | 10–12 | 113 sqm 1,216 sqft | Improved | $738,000 | $607 |
| Feb 2024 | 4-room | 10–12 | 93 sqm 1,001 sqft | Model A | $583,000 | $582 |
| Jan 2024 | 4-room | 10–12 | 93 sqm 1,001 sqft | Model A | $565,000 | $564 |
| Nov 2023 | 4-room | 04–06 | 93 sqm 1,001 sqft | Model A | $560,888 | $560 |
Month is when HDB registered the resale; floors are HDB's 3-storey bands. Highlight your own floor on the Market Map.
Straight-line distance from OneMap locations; walking is a little longer. See it on a map.
Sources: HDB resale flat prices (data.gov.sg), retrieved 2026-10-21; URA private residential transactions; OneMap (Singapore Land Authority) locations; HDB median rents. Updated weekly. Figures are past transactions, not a valuation.