Condos in Singapore: The Full Directory
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District 26 · Mandai, Upper Thomson · 99-year from 1993Castle Green
17 caveated sales in the last 12 months at a median of $1.56M ($1,381 psf), +42.4% since 2021. Prices by floor and size, the HDB flats next door and every condo nearby — in 3D.
The condo, in 3D
Where it stands, its tenure and age, and every other condo within a kilometre.
What it sells for
Every caveated sale here, month by month: the price per square foot, how many changed hands and the latest deals.
The price since records began
The median $psf each year, how much it has grown, and what a unit bought back then would be worth today.
Does a higher floor pay?
Price per square foot by floor band in this project.
Price by size
What each size of unit sells for here, and a quick estimate for the size you have in mind.
From the HDB flats next door
What HDB flats within a kilometre sell for, flat type by flat type — and the top-up from each to a unit here.
How it ranks in its district
This condo against every other condo in the district: price, age, tenure and momentum.
What is around it
Schools within 1 and 2 km, new launches nearby, and the sun on its windows.
Your next step
Every transaction, a valuation, the condos nearby — and someone to ask.
The facts
Castle Green: the facts from URA's records
| Project | Castle Green |
|---|---|
| Street | Yio Chu Kang Road |
| District | D26 — Mandai, Upper Thomson (OCR) |
| Tenure | 99-year lease from 1993 (66 years left) |
| Highest floor sold | floor 11 and above |
| Sales on record | 127 since 2021 (0 new sales from the developer) |
| Last 12 months | 17 sales · median $1.56M · $1,381 psf · typical 1,152 sqft · range $1.24M to $2.31M |
| Last 3 years | 61 sales · median $1,320 psf |
| Momentum | +5% ($psf, last 12 months vs the 12 before) |
| Growth since first record | +42.4% since 2021 |
| Floor premium | — |
| District $psf (12 months) | $2,179 — this condo is -37% |
| HDB resale within 1 km (12 months) | 3 Room $426,000 · 4 Room $528,000 · 5 Room $833,888 · Executive $1.35M |
Latest sales at Castle Green
| Month | Sale | Floor | Size | Price | $psf |
|---|---|---|---|---|---|
| Aug 2026 | Resale | 01-05 | 1,152 sqft | $1.63M | $1,414 |
| May 2026 | Resale | 11-15 | 1,410 sqft | $2.16M | $1,532 |
| Apr 2026 | Resale | 01-05 | 1,216 sqft | $1.56M | $1,283 |
| Apr 2026 | Resale | 01-05 | 947 sqft | $1.3M | $1,372 |
| Apr 2026 | Resale | 01-05 | 1,152 sqft | $1.66M | $1,441 |
| Mar 2026 | Resale | 11-15 | 1,410 sqft | $2.15M | $1,525 |
| Mar 2026 | Resale | 01-05 | 947 sqft | $1.37M | $1,446 |
| Mar 2026 | Resale | 06-10 | 1,152 sqft | $1.6M | $1,389 |
| Feb 2026 | Resale | 01-05 | 947 sqft | $1.25M | $1,321 |
| Feb 2026 | Resale | 01-05 | 947 sqft | $1.3M | $1,375 |
| Jan 2026 | Resale | 01-05 | 947 sqft | $1.24M | $1,308 |
| Jan 2026 | Resale | 06-10 | 947 sqft | $1.26M | $1,330 |
| Dec 2025 | Resale | 01-05 | 947 sqft | $1.31M | $1,381 |
| Dec 2025 | Resale | 06-10 | 1,152 sqft | $1.68M | $1,459 |
| Nov 2025 | Resale | 01-05 | 1,216 sqft | $1.59M | $1,306 |
| Nov 2025 | Resale | 01-05 | 1,152 sqft | $1.5M | $1,302 |
| Nov 2025 | Resale | 06-10 | 1,216 sqft | $2.31M | $1,898 |
| Sep 2025 | Resale | 11-15 | 1,410 sqft | $2.2M | $1,560 |
| Aug 2025 | Resale | 01-05 | 1,152 sqft | $1.51M | $1,311 |
| Jul 2025 | Resale | 01-05 | 1,216 sqft | $1.6M | $1,315 |
Median $psf by year
| Year | Sales | Median $psf |
|---|---|---|
| 2021 | 18 | $970 |
| 2022 | 34 | $1,062 |
| 2023 | 18 | $1,200 |
| 2024 | 26 | $1,302 |
| 2025 | 19 | $1,315 |
| 2026 | 12 | $1,382 |
Private condominium and apartment projects only: Executive Condominiums have their own directory and landed homes their own guide. Every figure is a caveated transaction from URA; medians are over the stated window; "sales since" counts the records we hold (URA publishes about five years). HDB figures are resale transactions from data.gov.sg in the last 12 months. Map positions come from URA's caveat coordinates.
Prices are caveats lodged with URA and can lag completed deals by weeks; medians are of the sales in the stated window and a project with few sales can swing. Growth and momentum compare medians, not the same units. Positions and building outlines are approximate. HDB figures are resale transactions from data.gov.sg. Lease left is counted from the lease start in URA's records. Nothing here is financial advice.