Koon Seng House
Project page · Freehold
Based on 6 sales in this project, last 12 months. Search widened 1 of 4 steps to find enough comparable sales. See the comparable sales.
No storey entered, so sales were not adjusted for height
Comparable sales
Each price per area is scaled to Q2 2026 by the published index for the quarter it sold in.
| Sold | Where | Floor | Size | Price | Per sqft | Index × | Adjusted |
|---|---|---|---|---|---|---|---|
| Jan 2026 | Koon Seng House | 01-05 | 1,313 sqft | S$2,926,000 | S$2,228 psf | ×0.988 | S$2,202 psf |
| Dec 2025 | Koon Seng House | 01-05 | 1,163 sqft | S$2,638,000 | S$2,269 psf | ×0.996 | S$2,260 psf |
| Dec 2025 | Koon Seng House | 01-05 | 1,313 sqft | S$2,960,000 | S$2,254 psf | ×0.996 | S$2,245 psf |
| Nov 2025 | Koon Seng House | 01-05 | 1,216 sqft | S$2,800,000 | S$2,302 psf | ×0.996 | S$2,293 psf |
| Nov 2025 | Koon Seng House | 01-05 | 1,216 sqft | S$2,860,000 | S$2,351 psf | ×0.996 | S$2,342 psf |
| Nov 2025 | Koon Seng House | 01-05 | 1,216 sqft | S$2,816,000 | S$2,315 psf | ×0.996 | S$2,306 psf |
How accurate is this estimate for Koon Seng House?
We re-ran the estimate as of Q4 2025 on what was known at the time, then compared it with the 6 sales in Koon Seng House since.
- Median error
- 1.8%
Half the estimates came closer than this to what the home actually fetched, half missed by more.
A thin test: 6 sales, so read the figure as a hint, not a verdict.
What the rent says
What this home earns against what it costs, set beside what homes like it earn.
1.45% gross yield
S$38,502 of rent a year against the estimate above · 1.7 points below flats like it
No lease here was signed at this size, so the rent comes from what the 1 leases at this project fetch per square foot, which is about S$3,209 a month at this size.
In the rest of the central region, freehold flats yield 3.15%, from 864 projects. Too few share this home's remaining lease to measure that separately.
A yield above the mark means the flat rents well for what it costs, which can point to a keen rental patch or a price the sales alone have not caught up with. Below it, buyers are paying for something a tenant will not, such as the address itself.
Recent leases signed here
| Signed | Size | Beds | Type | Rent a month |
|---|---|---|---|---|
| Q2 2026 | 2000-2500 sqft | — | Terrace House | S$6,200 |
1 URA rental contracts at Koon Seng House since 2025Q4, a median of S$2.76 psf a month on 108 sqm.
Buying or selling at S$2,646,523?
Buying: Stamp duty on S$2,646,523 · Cash and CPF needed on S$2,646,523 · How much can I borrow · Monthly repayment on a 75% loan · Property tax on this rent.
Selling: Net proceeds from selling on S$2,646,523.
Each opens with this figure filled in; change anything there.
Primary schools near 89 Koon Seng Road
Measured from each school's land to this address's own point, the way MOE bands P1 priority. MOE measures to the building's outline, so near 1 km or 2 km check OneMap's School Query.
Within about 1 km
- Haig Girls' School (girls) · 144 m · no 2025 Phase 2C ballot
- Tanjong Katong Primary School · 792 m · balloted in 2025 Phase 2C (citizens 1-2 km away)
- CHIJ (Katong) Primary (girls) · 879 m · no 2025 Phase 2C ballot
- Tao Nan School · 984 m · balloted in 2025 Phase 2C (citizens within 1 km) · near the line — check on OneMap
1 to 2 km
- St. Stephen's School (boys) · 1,525 m · no 2025 Phase 2C ballot
- Ngee Ann Primary School · 1,562 m · balloted in 2025 Phase 2C (PRs within 1 km)
- Kong Hwa School · 1,750 m · balloted in 2025 Phase 2C (citizens within 1 km)
- Maha Bodhi School · 1,782 m · balloted in 2025 Phase 2C (citizens within 1 km)
Past transactions
| Date | Detail | Area | Price | Per area |
|---|---|---|---|---|
| Jan 2026 | Koon Seng House · 01-05 · Apartmentnew sale | 1,313 sqft | S$2,926,000 | S$2,228 psf |
| Dec 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,313 sqft | S$2,960,000 | S$2,254 psf |
| Dec 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,163 sqft | S$2,638,000 | S$2,269 psf |
| Nov 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,216 sqft | S$2,816,000 | S$2,315 psf |
| Nov 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,216 sqft | S$2,860,000 | S$2,351 psf |
| Nov 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,216 sqft | S$2,800,000 | S$2,302 psf |
| Sept 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 786 sqft | S$1,819,000 | S$2,315 psf |
| May 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,033 sqft | S$2,387,000 | S$2,310 psf |
| May 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,313 sqft | S$2,935,000 | S$2,235 psf |
| Mar 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,216 sqft | S$2,847,690 | S$2,341 psf |
| Feb 2025 | Koon Seng House · 01-05 · Apartmentnew sale | 1,033 sqft | S$2,441,000 | S$2,362 psf |
| Dec 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 1,033 sqft | S$2,398,000 | S$2,321 psf |
| Nov 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 786 sqft | S$1,824,570 | S$2,322 psf |
| Aug 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 1,033 sqft | S$2,370,000 | S$2,294 psf |
| Apr 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 1,313 sqft | S$3,000,000 | S$2,285 psf |
| Apr 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 786 sqft | S$1,894,000 | S$2,410 psf |
| Mar 2024 | Koon Seng House · 01-05 · Apartmentnew sale | 786 sqft | S$1,810,000 | S$2,303 psf |
Sale prices as filed in caveats.
| Period | Detail | Monthly rent | Per area |
|---|---|---|---|
| Q2 2026 | Koon Seng House · 2000-2500 sqft · Terrace House | S$6,200 | S$2.76 psf |
Rents as approved by HDB, or as filed with URA for private homes, where the floor area is given as a band.
Indicative estimate from comparable caveats. Not a formal valuation.