Senja Ridges
District 23 · 230 homes · 99-year leasehold (HDB) · HDB · completed 2022 · MOP from 2027
Artist's impression, HDB
All 10 stacks of Senja Ridges (638A Senja Close) 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. The block was completed in 2022 (HDB), so the five-year minimum occupation period (MOP) ends from 2027, counted from each owner’s key collection. Until then homes here cannot be sold on the resale market.
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 18/10.
- 4-room, 93 sqm
- 5-room, 113 sqm
- 3Gen, 120 sqm
Senja Ridges in brief
- Least afternoon sun
- Stacks #13, #15: under an hour of direct sun after 2pm in every month.
- Clear view
- Stacks #05, #07, #09, #11: no building as tall as the window within 400 m.
- Blocked view
- Stacks #01, #17, #19: face Blk 640A Senja Link, 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 10 stacksHide the table
Computed for the middle storey of each tower (storey 17 in the 33-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 638A · 33 storeys · 10 stacks
| Stack | Type | Faces | Looks onto | Buildings straight ahead | 21 Jun | 21 Dec | Afternoon sun |
|---|---|---|---|---|---|---|---|
| #01 | 4-room, 93 sqm | SSE 162° | Senja Close, 27 m | Blk 640A Senja Link, 57 m (at least as tall as this stack) | 0h | 11.1h | Nov–Feb |
| #03 | 5-room, 113 sqm | SSE 162° | Senja Close, 31 m | 640 Senja Link, 83 m (seen over from storey 4) | 0h | 11.1h | Nov–Feb |
| #05 | 3Gen, 120 sqm | NNW 342° | Out of the estate: Blk 638 Senja Close, 18 m | Blk 638 Senja Close, 18 m (seen over from storey 5) | 12.2h | 0h | Feb–Oct |
| #07 | 4-room, 93 sqm | NNW 341° | Out of the estate: Blk 638 Senja Close, 19 m | Blk 638 Senja Close, 19 m (seen over from storey 5) | 12.2h | 0h | Feb–Oct |
| #09 | 5-room, 113 sqm | NNW 341° | Out of the estate: Blk 638 Senja Close, 21 m | Blk 638 Senja Close, 21 m (seen over from storey 5) | 9.5h | 0h | Feb–Oct |
| #11 | 4-room, 93 sqm | NNW 341° | Out of the estate: Blk 638 Senja Close, 21 m | Blk 638 Senja Close, 21 m (seen over from storey 5) | 8.4h | 0h | Feb–Oct |
| #13 | 3Gen, 120 sqm | ENE 72° | Out of the estate: Blk 646 Senja Close, 255 m | Blk 646 Senja Close, 255 m (seen over from storey 5) | 6.6h | 4.7h | None |
| #15 | 5-room, 113 sqm | ENE 72° | Out of the estate | Open, nothing within 400 m | 6.5h | 4.8h | None |
| #17 | 3Gen, 120 sqm | SSE 162° | Senja Close, 26 m | Blk 640A Senja Link, 72 m (at least as tall as this stack) | 0h | 10.8h | Nov–Feb |
| #19 | 4-room, 93 sqm | SSE 162° | Senja Close, 28 m | Blk 640A Senja Link, 64 m (at least as tall as this stack) | 0h | 8.2h | Dec–Jan |
Price at launch
HDB’s selling prices before grants at the May 2016 BTO sales launch. Flats were priced by storey and facing, and buyers then deducted their grants. These are launch prices, not what the flats resell for today.
4-Room
$239,000 to $336,000
106 flats offered
5-Room
$315,000 to $410,000
62 flats offered
3Gen
$316,000 to $407,000
62 flats offered
HDB priced it together with Senja Heights and Senja Valley, launched at the same time, so the ranges cover all of them; the flat counts are this estate's own. Source: HDB, May 2016 BTO sales launch release (archived copy).
Frequently asked questions
Which Senja Ridges stacks avoid the afternoon sun?
2 stacks get under an hour of direct sun after 2pm, every month of the year.
- #13
- #15
Mid-height storey, after shading by neighbouring blocks. The tool above shows any storey.
Which Senja Ridges stacks take the afternoon sun most of the year?
No stack takes the afternoon sun in ten or more months at mid-height.
Which Senja Ridges stacks have the most open view?
4 stacks have a clear view across the whole window.
- #05
- #07
- #09
- #11
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 Senja Ridges stacks look straight at another block?
These face a building at least as tall as themselves, so no storey looks over it.
Blk 640A Senja Link
- #01 · 57 m
- #17 · 72 m
- #19 · 64 m
Which Senja Ridges stacks face a road?
Grouped by the road each stack looks onto.
Senja Close
- #01
- #03
- #17
- #19
Road within 80 m straight ahead, with no other tower of the project in between.
What did Senja Ridges cost at launch?
At HDB's May 2016 BTO sales launch, before grants: 4-Room $239,000 to $336,000, 5-Room $315,000 to $410,000, 3Gen $316,000 to $407,000. These are HDB's own figures from its launch release; flats were priced by storey and facing, and buyers then deducted their grants. HDB priced it together with Senja Heights and Senja Valley, launched at the same time, so the ranges cover all of them; the flat counts are this estate's own. Resale prices today are different.
Can I see the Senja Ridges floor plans?
Yes. Pick a stack and its floor plan shows beside the map, as the developer published it: 3 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 2026-10-18 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; 0 of the 10 stacks are also named on the developer’s floor plans, and all of those match.
Facing. The facing is the side the living room is on, read from the developer’s floor plan for each of the 10 stacks. End and corner homes also have bedroom windows on a second side, which the tool does not model.
Heights. Towers use the developer’s storey counts at an assumed 3.05 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. Floor plans: HDB's sales brochure for Senja Ridges, layout pictures (open kitchen version). Furniture is HDB's suggestion. Typical: the home on a given stack may differ in detail or be its mirror image. Not to scale, areas approximate.
Not shown. Asking prices: a resale home is priced by its owner, and what is on the market changes by the week. Anything the developer did not publish is not shown either. Details are as at 2026-10-18 and can change. Sources: HDB's sales brochure (May 2016); data.gov.sg (HDB Property Information); OpenStreetMap.
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