Keystone @ Mandai
District 25 · 69 units · Freehold · B2 ramp-up industrial · launched May 2025 · TOP Late 2027 / early 2028
Artist's impression: Bayswood Pte Ltd
All 7 stacks of Keystone @ Mandai (2C Mandai Estate) in 3D on the real map, beside the buildings around them at their real heights. Pick a stack and a storey to see its facing, its view and its hours of sun.
Coolest stacksEvery stack ranked by direct sun after 2pm, least first.OpenHide
Working out every stack…
How to read the map and the colours
Every home is drawn floor by floor, coloured by unit type, in the same colours as the developer’s storey plans. Tap a stack or its number to pick it. Drag to move the map; hold Ctrl or Command and drag (or right-drag) to turn and tilt it. On a phone, one finger moves it and two fingers pinch, twist and tilt it. Zoom in to see every stack number. Navy: your stack. Orange: your storey. Dashed gold line: the view straight out of the window. Dark patches: shadows of the taller buildings at 15:00 on 22/10.
- East-wing unit 1,647-1,765 sq ft
- West-wing unit 1,927-2,045 sq ft
- Ground-floor unit (east wing)
- Industrial canteen
Keystone @ Mandai in brief
- Least afternoon sun
- Stacks #03 (storey 1), #03 (storey 2), #03 (storey 3), #03 (storey 4), #03 (storey 5), #03 (storey 6) and 43 more: under an hour of direct sun after 2pm in every month.
- Clear view
- Stacks #02 (storey 3), #02 (storey 4), #02 (storey 5), #02 (storey 6), #02 (storey 7), #02 (storey 8) and 42 more: no building as tall as the window within 400 m.
- Blocked view
- Stacks #03 (storey 1), #03 (storey 2), #04 (storey 1), #04 (storey 2), #05 (storey 1), #05 (storey 2) and 3 more: face Thermal, as tall as the stack or taller.
Read at the middle storey of each stack. The tool above shows any storey.
Every stack at a glance
Show the table of all 7 stacksHide the table
Computed for the middle storey of each tower (storey 5 in the 10-storey block), or the middle of its own storeys for a stack that does not have that storey. Sun columns are hours of direct sun on the window on 21 June and 21 December after shading by other buildings; “Afternoon sun” lists the months with an hour or more after 2pm. Open the tool for any other storey or date.
Block 2C · 10 storeys · 7 stacks
| Stack | Type | Faces | Buildings straight ahead | 21 Jun | 21 Dec | Afternoon sun |
|---|---|---|---|---|---|---|
| #01 (storey 1) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (at least as tall as this stack) | 0h | 6.5h | Oct–Mar |
| #02 (storey 1) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 11.8h | 0h | Apr–Sep |
| #03 (storey 1) | Ground-floor unit (east wing) | E 83° · corner | Thermal, 35 m (at least as tall as this stack) | 5.4h | 5.1h | None |
| #04 (storey 1) | Ground-floor unit (east wing) | E 83° · corner | Thermal, 36 m (at least as tall as this stack) | 5.4h | 5.1h | None |
| #05 (storey 1) | Ground-floor unit (east wing) | E 83° · corner | Thermal, 36 m (at least as tall as this stack) | 5.4h | 5.4h | None |
| #06 (storey 1) | Industrial canteen | E 83° · corner | Thermal, 37 m (at least as tall as this stack) | 5.5h | 5.3h | None |
| #01 (storey 2) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (at least as tall as this stack) | 0h | 6.8h | Oct–Mar |
| #02 (storey 2) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.1h | 0h | Apr–Sep |
| #03 (storey 2) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (at least as tall as this stack) | 6.1h | 5.6h | None |
| #04 (storey 2) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (at least as tall as this stack) | 6.1h | 5.6h | None |
| #05 (storey 2) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (at least as tall as this stack) | 6.1h | 5.6h | None |
| #06 (storey 2) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (at least as tall as this stack) | 6.1h | 5.7h | None |
| #07 (storey 2) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (at least as tall as this stack) | 6.1h | 5.7h | None |
| #01 (storey 3) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 3) | 0h | 6.9h | Oct–Mar |
| #02 (storey 3) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 3) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 3) | 6.3h | 5.8h | None |
| #04 (storey 3) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 3) | 6.3h | 5.8h | None |
| #05 (storey 3) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 3) | 6.3h | 5.8h | None |
| #06 (storey 3) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 3) | 6.3h | 5.8h | None |
| #07 (storey 3) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 3) | 6.3h | 5.8h | None |
| #01 (storey 4) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 4) | 0h | 7.0h | Oct–Mar |
| #02 (storey 4) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 4) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 4) | 6.3h | 5.8h | None |
| #04 (storey 4) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 4) | 6.3h | 5.8h | None |
| #05 (storey 4) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 4) | 6.3h | 5.8h | None |
| #06 (storey 4) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 4) | 6.3h | 5.8h | None |
| #07 (storey 4) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 4) | 6.3h | 5.8h | None |
| #01 (storey 5) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 5) | 0h | 7.2h | Oct–Mar |
| #02 (storey 5) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 5) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 5) | 6.3h | 5.8h | None |
| #04 (storey 5) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 5) | 6.3h | 5.8h | None |
| #05 (storey 5) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 5) | 6.3h | 5.8h | None |
| #06 (storey 5) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 5) | 6.3h | 5.8h | None |
| #07 (storey 5) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 5) | 6.3h | 5.8h | None |
| #01 (storey 6) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 6) | 0h | 7.4h | Oct–Mar |
| #02 (storey 6) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 6) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 6) | 6.3h | 5.8h | None |
| #04 (storey 6) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 6) | 6.3h | 5.8h | None |
| #05 (storey 6) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 6) | 6.3h | 5.8h | None |
| #06 (storey 6) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 6) | 6.3h | 5.8h | None |
| #07 (storey 6) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 6) | 6.3h | 5.8h | None |
| #01 (storey 7) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 7) | 0h | 7.8h | Oct–Mar |
| #02 (storey 7) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 7) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 7) | 6.3h | 5.8h | None |
| #04 (storey 7) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 7) | 6.3h | 5.8h | None |
| #05 (storey 7) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 7) | 6.3h | 5.8h | None |
| #06 (storey 7) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 7) | 6.3h | 5.8h | None |
| #07 (storey 7) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 7) | 6.3h | 5.8h | None |
| #01 (storey 8) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 167 m (seen over from storey 8) | 0h | 8.8h | Oct–Mar |
| #02 (storey 8) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 8) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 8) | 6.3h | 5.8h | None |
| #04 (storey 8) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 8) | 6.3h | 5.8h | None |
| #05 (storey 8) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 8) | 6.3h | 5.8h | None |
| #06 (storey 8) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 8) | 6.3h | 5.8h | None |
| #07 (storey 8) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 8) | 6.3h | 5.8h | None |
| #01 (storey 9) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 168 m (seen over from storey 9) | 0h | 10.8h | Oct–Mar |
| #02 (storey 9) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 9) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 9) | 6.3h | 5.8h | None |
| #04 (storey 9) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 9) | 6.3h | 5.8h | None |
| #05 (storey 9) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 9) | 6.3h | 5.8h | None |
| #06 (storey 9) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 9) | 6.3h | 5.8h | None |
| #07 (storey 9) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 9) | 6.3h | 5.8h | None |
| #01 (storey 10) | West-wing unit 1,927-2,045 sq ft | S 180° · corner | Building, 168 m (seen over from storey 10) | 0h | 11.7h | Oct–Mar |
| #02 (storey 10) | West-wing unit 1,927-2,045 sq ft | N 0° · corner | Open, nothing within 400 m | 12.2h | 0h | Apr–Sep |
| #03 (storey 10) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 34 m (seen over from storey 10) | 6.3h | 5.8h | None |
| #04 (storey 10) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 35 m (seen over from storey 10) | 6.3h | 5.8h | None |
| #05 (storey 10) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 10) | 6.3h | 5.8h | None |
| #06 (storey 10) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 36 m (seen over from storey 10) | 6.3h | 5.8h | None |
| #07 (storey 10) | East-wing unit 1,647-1,765 sq ft | E 83° · corner | Thermal, 37 m (seen over from storey 10) | 6.3h | 5.8h | None |
Frequently asked questions
Which Keystone @ Mandai stacks avoid the afternoon sun?
5 stacks get under an hour of direct sun after 2pm, every month of the year.
- #03
- #04
- #05
- #06
- #07
Mid-height storey, after shading by neighbouring blocks. The tool above shows any storey.
Which Keystone @ Mandai stacks take the afternoon sun most of the year?
No stack takes the afternoon sun in ten or more months at mid-height.
Which Keystone @ Mandai stacks have the most open view?
6 stacks have a clear view across the whole window.
- #02 (storey 3)
- #02 (storey 4)
- #02 (storey 5)
- #02 (storey 6)
- #02 (storey 7)
- #02 (storey 8)
- #02 (storey 9)
- #02 (storey 10)
- #03 (storey 3)
- #03 (storey 4)
- #03 (storey 5)
- #03 (storey 6)
- #03 (storey 7)
- #03 (storey 8)
- #03 (storey 9)
- #03 (storey 10)
- #04 (storey 3)
- #04 (storey 4)
- #04 (storey 5)
- #04 (storey 6)
- #04 (storey 7)
- #04 (storey 8)
- #04 (storey 9)
- #04 (storey 10)
- #05 (storey 3)
- #05 (storey 4)
- #05 (storey 5)
- #05 (storey 6)
- #05 (storey 7)
- #05 (storey 8)
- #05 (storey 9)
- #05 (storey 10)
- #06 (storey 3)
- #06 (storey 4)
- #06 (storey 5)
- #06 (storey 6)
- #06 (storey 7)
- #06 (storey 8)
- #06 (storey 9)
- #06 (storey 10)
- #07 (storey 3)
- #07 (storey 4)
- #07 (storey 5)
- #07 (storey 6)
- #07 (storey 7)
- #07 (storey 8)
- #07 (storey 9)
- #07 (storey 10)
Mid-height storey. Clear means all nine sight lines (±40° of the facing) pass no building as tall as the window within 400 m.
Which Keystone @ Mandai stacks look straight at another block?
These face a building at least as tall as themselves, so no storey looks over it.
Thermal
- #03 (storey 1) · 35 m
- #03 (storey 2) · 34 m
- #04 (storey 1) · 36 m
- #04 (storey 2) · 35 m
- #05 (storey 1) · 36 m
- #05 (storey 2) · 36 m
- #06 (storey 1) · 37 m
- #06 (storey 2) · 36 m
- #07 (storey 2) · 37 m
Can I see the Keystone @ Mandai floor plans?
Yes. Pick a stack and its floor plan shows beside the map, as the developer published it: 10 layouts, each with its size, the units it applies to and a key plan. Tap it to enlarge.
How this is worked out, and its limits
Stacks are traced from the developer’s site plan onto the map, and the sun and view are worked out against the buildings around them. Details are as at 2026-10-22 and can change.
Show the method and its limitsHide the method
Where the stacks are. Each stack’s outline is traced from the developer’s site plan and fitted to the land parcel on the map. Expect positions within a few metres and bearings within a few degrees. Unit types come from the developer’s storey plans and add up to the published unit mix, and the map uses those same colours; 7 of the 7 stacks are also named on the developer’s floor plans, and all of those match.
Facing. A mid-block stack faces away from the side of the block it sits on. End and corner stacks (marked “corner”) have windows on more than one side; 69 of them are not yet checked against the floor plan, so the tool uses the main facade.
Heights. Towers use the developer’s storey counts at an assumed 5.6 m per storey. Buildings standing around the estate use the height in the Singapore Land Authority’s 3D model, read off OneMap 3D on 2 October 2026; where one outline covers a tower and its podium, it is cut into its parts. A building not yet in that model (still being built) uses its published storey count at 3.6 m a storey for a condo and 3.0 m for an HDB block, the averages measured for built ones. Every building is modelled as its footprint raised straight up, on level ground: no roofs, balconies, trees or slopes.
Sun. The same solar model as the Sun Path & Facing Calculator, checked to within about three minutes, with a building in the way counted as shade. The window is a point at mid-storey height on the middle of the outside wall. Balconies, overhangs and cloud cut real sun further, so read the hours as a ceiling.
Sun across the year and coolest stacks. The year grid tests the window every half hour on the 15th of each month. Coolest stacks ranks by the average of those twelve days in hours of direct sun after 2pm, least first, at the middle storey of each stack with shade from other buildings taken off; the hours for the whole day sit beside it. For a home at the end of its block the afternoon figure also counts the sun on its end wall.
Floor plans. The developer’s own pages, unaltered, matched to each stack by the layout code on the developer’s schematic diagram. A stack the plan lists as a mirror unit is the plan flipped. Storey plans: Bayswood Pte Ltd, Keystone @ Mandai (via Huttons Pro+). Developer's plans, subject to change and final survey; not drawn to scale. Each unit shows its whole storey plan.
Not shown. Prices, and anything the developer has not published. Details are as at 2026-10-22 and can change. Sources: Developer's plans and project record (via Huttons Pro+); Developer's price list; OneMap and OpenStreetMap.
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