A serviced apartment tower is a machine for repeating one room 196 times, and its facade has to respect that before it does anything else. The concept here is a G+14 corporate serviced apartment tower on the Noida Expressway, Sector 140-144 IT corridor, on a 46 m plot frontage. Each floor plate rotates 2.5 degrees about the core, 35 degrees over 14 floors, while every unit stays locked to a fixed 4.2 m structural bay. It is a SOGA design concept, drawn and reasoned, not a built building.
A serviced apartment (aparthotel) facade is the exterior system of a corporate extended-stay tower, built around one repeating structural unit bay rather than a one-off elevation, because the same unit must stack unchanged so an operator can furnish, clean and service it at scale.
Why Does a Serviced Apartment Facade Twist 2.5 Degrees a Floor?
Because the view is on the wrong side of a neighbour’s blank wall, and a fixed grid cannot fix that. The plot on the Noida Expressway has a neighbouring building built to the boundary, roughly 28 m of party wall with no openings. An extruded box puts the south-end units of the first eight floors in front of that wall.
So the plate turns. Each floor rotates 2.5 degrees about the fixed core, the top plate sits 35 degrees off the ground plate, and the units at the plate end swing out from the wall by roughly 5 m by level 8 and 8.8 m by level 14. We own the obvious objection: a twisting tower is normally sold as a shape, and shapes are what get value-engineered out. This one is defended as a setback and view-easement response, and that is the only reason it survives a QS review.
The rule, answer first: rotate the plate, never the unit. The 4.2 m bay is the constraint that survives every floor.
What Is a Serviced Apartment Tower, and What Must Its Facade Fit?
A serviced apartment tower is a corporate extended-stay building where one operator runs identical furnished studios for stays of 30 to 180 days. It is a distinct buyer from a hotel operator and from a residential developer, and the facade brief follows the buyer. The operator wants unit repeatability, cheap turnover and a view that justifies a rate tier.
Stage one of the method is the programme, fixed before anything is drawn. The plot faces the expressway with a 46 m frontage and a plot depth of about 60 m. Ground holds a 4.5 m double-height lobby, an all-day F&B counter and a service bay off the rear lane. Floors 1 to 14 carry 14 studios each on a double-loaded corridor, seven per long face, 196 keys in all. Roof holds the plant and a small residents’ terrace.
The catchment is corporate. Guests arrive by cab or by company shuttle, stay a project term, cook something simple in the kitchenette and leave. That is why the 4.2 m unit width matters: it is the smallest studio that fits a double bed, a full-height wardrobe wall, a 1.2 m kitchenette run and a 2.0 m by 2.4 m bathroom pod without a corridor wasted on a bend.
| Programme | Area / count |
|---|---|
| Plot / frontage | About 46 m x 60 m, expressway frontage 46 m |
| Storeys | G+14, 15 levels, floor-to-floor 3.3 m, height about 49.5 m |
| Unit bay | 4.2 m fixed structural bay, studio 4.2 m x 8.4 m, about 35 sq m |
| Units | 14 per floor, 196 in total, double-loaded corridor |
| Ground | Double-height lobby, F&B counter, service bay, 4.5 m clear |
| Plate | 29.4 m long (7 bays) x 18 m deep, rotates about the fixed core |
| Parking | Two basement levels, about 180 car and two-wheeler bays |
How Does a 35-Degree Twist Sit on a 46 m Frontage?
The twist sits inside the frontage because the plate is 29.4 m long, not 46 m. That leaves 8 m of setback on each side, and the geometry has to be checked against it. A 29.4 m by 18 m plate rotated 35 degrees occupies about 34 m along the frontage and 32 m in depth, inside a 46 m by 60 m plot with the ground-floor setbacks retained.
Stage two is the massing operation, and here it is M08, the twist: plates rotate about a vertical axis by a fixed number of degrees per floor. The driver is physical. Without rotation, the south-end units on levels 1 to 8 look at a blank wall 6 to 12 m away. With rotation, the end of each plate steps away from that wall by 0.64 m on level 1, 2.6 m on level 4, 5.1 m on level 8 and 8.8 m on level 14, and its glazed face turns toward the expressway by the same degree count.
The step is the visible signature, and it is the part most likely to go wrong. At the plate end, the slab edge steps 0.64 m per floor. A point one 4.2 m bay in from the end moves 183 mm less per floor for every bay closer to the core. So the offset grows in a clean 183 mm-per-bay increment along the plate, which is what lets one precast band panel type serve every bay.
The Rule: Rotate the Plate 2.5 Degrees, Never the Unit
The rule is one sentence: each floor plate rotates 2.5 degrees about the core, and the unit inside stays 4.2 m by 8.4 m, so the twist is absorbed at the slab edge and never in the room. The rotation is 2.5 degrees per floor, the range is 35 degrees over 14 floors, and at both ends the bay does not move: level 1 sits 2.5 degrees off the ground plate, level 14 sits 35.
Read the table as a design, not a decoration. The step at the plate end is r times the rotation in radians, with r = 14.7 m to the end of the long face, so it is 0.64 m per floor. The cumulative offset from the ground plate is the chord, 2 r sin(theta/2), which is why it grows a little slower than the angle. Rotating the plate faster than 2.5 degrees pushes the top-floor end past the 8 m side setback.
| Level | Rotation from ground plate | Plate-end step | Offset from ground plate |
|---|---|
| Level 1 | 2.5 degrees | 0.64 m per floor | 0.64 m |
| Level 4 | 10 degrees | 0.64 m per floor | 2.6 m |
| Level 8 | 20 degrees | 0.64 m per floor | 5.1 m |
| Level 11 | 27.5 degrees | 0.64 m per floor | 7.0 m |
| Level 14 | 35 degrees | 0.64 m per floor | 8.8 m |
Grain: How Does a 4.2 m Bay Read at the Street?
At street level the 4.2 m bay reads as a rhythm a person can count. Along the 29.4 m plate there are seven bays, and at the ground every second bay changes: bay 1 is the service bay, bays 2 to 3 the F&B counter, bays 4 to 5 the double-height lobby, bays 6 to 7 a shaded seating ledge, so nothing runs longer than 8.4 m without a change.
Stage three, grain, is where the concept stops looking like a render. The entrance is one primary door, 2.4 m wide, at bay 4, with two secondary doors, and the service bay is kept off the expressway face on the rear lane. The rotated plates overhang the ground floor by up to 3.8 m at the plate end, so the lobby gets deep shade that no canopy has to be bolted on to produce, and a 450 mm seating ledge runs along the shaded base for the driver waiting for a guest.
Two-wheelers matter here more than in Dubai or Doha. Corporate guests commute by cab, but the operator’s staff arrive by scooter and metro feeder, so 40 two-wheeler bays are drawn at the rear lane and not left as an afterthought in the basement.
Skin: How Do a Precast Band and an Anodised Fin Work Together?
The skin is two parts and each does one job. A precast concrete band, 900 mm high and 120 mm thick, carries the floor edge at every level and hides the slab. Bronze-anodised fins, 250 mm deep, sit at 1,050 mm centres in front of the glazing, four per bay, and provide the shade and the rhythm.
Stage four, skin, comes last and serves the massing. The fin pitch is exactly the bay divided by four, 4,200 divided by 4 is 1,050 mm, so no fin ever lands off a bay line and the twist never asks a fin to be cut short. Each band panel is 4.2 m by 0.9 m by 120 mm, about 1.1 t, and there are 14 per floor across the two long faces, 196 panels from one steel mould family. The finish is a dark bronze anodised tone with a matte precast surface, chosen because it takes the corridor’s dust without showing it.
The glazing between band and fin is 2.4 m of the 3.3 m floor height. That leaves the band at 27 percent of the elevation and the fin covering all of it, which is what the cost table is built on.
How Is a Rotating Floor Plate Built? Core, Columns and Tolerance
A rotating floor plate is built by keeping the core still and hanging each plate off it. The RCC shear core does not rotate. It is staggered only at the lift and stair walls, and the perimeter columns lean between floors to meet the rotated grid, about 5.5 degrees at 7.35 m from the core and about 11 degrees at 14.7 m.
Three things decide whether the concept is buildable: the transfer level where the twist begins, the slab-edge tolerance at each rotated joint, and how the fin and band are fixed back. The twist begins at level 1, above a 4.5 m transfer level that turns the ground-floor columns into the first leaning set. Tolerance is set at +/-5 mm on the edge line, and the 12 mm open joint between band panels absorbs the rest.
- Structure: RCC shear core, fixed, with staggered lift-and-stair walls, plus leaning perimeter columns at 5.5 to 11 degrees. A structural engineer must model and price this; the number is not in this post.
- Fixing: cast-in channels in each band panel, stainless brackets and a bronze-anodised fin carrier bolted through, so no fin depends on wet work on site.
- Movement: a 12 mm open joint between band panels, sealed at the back and left visible, sized for a 40 degree C seasonal swing across a 4.2 m panel.
- Access: a 600 mm fin-clear zone at every plate edge gives a cradle rope-access line, and the plate offsets mean the cradle is re-hung every 4 floors, not once.
- Lead time: the steel mould is the long item, about 8 to 10 weeks, and 196 castings follow at about 12 a week.
What Does a Precast and Anodised Fin Facade Cost per Sq Ft in India?
A precast band with an anodised fin costs about ₹550 to ₹1,700 per sq ft of elevation in Delhi NCR in 2026, excluding glazing and GST. That is the market range, built from two published supplier ranges, not a SOGA fee and not a quote.
The fin extrusion, supplied and fixed, is listed by Delhi NCR suppliers at ₹450 to ₹1,450 per sq ft in 2026, with GST at 18 percent extra. Precast and glass-fibre-reinforced concrete cladding panels are listed at roughly ₹250 to ₹750 per sq ft; we widen that to ₹350 to ₹900 for a 120 mm band with cast-in channels and a matte finish. The band covers 27 percent of the elevation and the fin all of it, so the blended figure is ₹550 to ₹1,700.
On the two long faces, about 29,200 sq ft of elevation, that is roughly ₹1.6 to ₹5.0 crore. The range is wide because finish, anodising thickness and the sub-frame decide most of the spread, so the real number comes only from a fabricator’s quote on a fixed drawing set. The structural premium for leaning columns is deliberately not in this table.
| Scope | Indicative market range (2026) |
|---|---|
| Anodised fin extrusion, supplied and fixed (NCR supplier listings, 2026) | ₹450-1,450 / sq ft |
| Precast band 120 mm, cast-in channels, matte finish (widened from ₹250-750 panel listings) | ₹350-900 / sq ft |
| Blended, per sq ft of elevation (band 27%, fin 100%), ex glazing, ex GST | ₹550-1,700 / sq ft |
| Same range per sq m | ₹5,900-18,300 / sq m |
| Two long elevations, about 29,200 sq ft, indicative total | ₹1.6-5.0 crore |
Where the Twist Stops Paying
The twist stops paying on any plot that has no blank neighbour and no view to win. Then it is a shape, it costs more, and a straight box with the same fin and band is the better building. Below about 10 floors the cumulative offset is only 3.5 m at the plate end, too little to clear a party wall, and the leaning columns are not worth the trouble.
There is also a cost we do not hide. The units repeat, but the risers do not run straight. A bathroom wet wall 7 m from the core shifts 0.3 m per floor, so every slab carries an offset bend in the drainage and the supply, 14 times up the tower. We accept that because the wet wall sits in a corridor-side service zone, but it is a real cost, and an operator should price it before believing the elevation.
Serviced Apartment vs Hotel vs Residential Facade: What Changes?
A serviced apartment facade differs from a hotel facade and a residential facade in three measurable ways: one fixed unit module repeats on every floor, the skin serves stays of weeks to months, and the plate is shaped by a setback or view-easement constraint rather than by street branding. The table puts the three briefs side by side.
The point of the comparison is fencing, not rivalry. A hotel facade is bought for arrival and branding, so its money goes to the lobby face and a curtain wall that photographs well. A residential block is bought by many owners, so it tolerates variety, different balcony depths and elevation moods per family. A serviced apartment tower is bought by one operator who wants the 196th room to be the first room again. That single fact moves the facade decision from the elevation drawing to the structural bay.
| Facade requirement | Hotel | Residential apartment | Serviced apartment (this concept) |
|---|---|
| Typical stay | Hotel: 1-7 nights | Residential: owner-occupied, 5-30 years | Serviced: 30-180 days, corporate long-stay |
| Unit module | Hotel: varies by room type, 3.6-5.4 m | Residential: varies by family size, 3.0-9.0 m | Serviced: one fixed 4.2 m bay, 100% of units |
| Facade driver | Hotel: street presence and branding | Residential: balcony use and ventilation | Serviced: view-corridor easement, 35 degrees over 14 floors |
| Skin system | Hotel: curtain wall or stone-clad | Residential: balcony bands, screens | Serviced: precast band, 900 mm high, plus anodised fin at 1,050 mm centres |
| Repeatability that matters | Hotel: floor-by-floor room mix | Residential: none, every flat is different | Serviced: 196 identical units and 196 identical band panels |
| Party wall / setback pressure | Hotel: usually a podium, low | Residential: medium | Serviced: high, a blank neighbour wall about 28 m tall on one boundary |
Operator Economics: Does the Twist Cost Occupancy or Unit Repeatability?
The twist costs the operator almost nothing in unit repeatability, because the rotation happens to the plate and not to the unit. Every studio is 4.2 m wide by 8.4 m deep, about 35 sq m or 380 sq ft, and every one of the 196 is drawn once. The bathroom pod, kitchenette run, joinery set and furniture package are ordered 196 times at the same drawing number.
Operators buy a serviced building on occupancy and on the cost of turning a unit over. Corporate long-stay units in an IT corridor tend to hold higher occupancy than a leisure hotel because the guest is on a project posting of weeks, not a weekend, so a view that lets the operator price the upper eight floors as a premium tier is worth more than a lobby chandelier. Those are the floors that gain the expressway view, and nothing inside the room changes to earn it.
Back-of-house stacking stays in the part of the building that does not rotate. The core, service lift, linen and housekeeping stores, garbage chute and the F&B kitchen at the ground level all sit on the fixed shear core and the unrotated podium. Housekeepers work a corridor that is the same length on all 14 floors. What the twist does change is the riser line, which is discussed honestly in the limit section.
Does the Same Twist Work in Dubai, Singapore and Doha?
The same rule, rotate the plate and lock the bay, works in all four places only if the driver changes. A twist copied between cities as a shape would be decoration. Each variant below carries its own physical driver and its own number, and each is a separate building.
Dubai: solar load. A G+20 serviced tower on a west-facing plot turns 3 degrees per floor, 60 degrees over 20 floors, so the long glazed face swings from due west toward north-west by the top. The fin deepens to 450 mm and the window-to-wall ratio on the west face drops to about 35 percent. The twist is bought to take the low afternoon sun off the glass, and the view is a side benefit.
Singapore: monsoon rain-shadow. A G+16 tower turns 1.5 degrees per floor, 24 degrees in total, so the recessed balcony face sits in the lee of the north-east monsoon rain from December to March, while the exposed end takes the rain on a blank precast wall. Every plate edge carries a 600 mm drip overhang, because the driver is water on the joint, not sun on the glass.
Doha: dust and prevailing wind. A G+18 tower turns 2 degrees per floor, 36 degrees in total, to present its narrow, closed end to the north-westerly shamal, so the fins on the windward face are spaced at 525 mm instead of 1,050 mm and catch less blown dust on the glazing. The driver is a wind-borne particle load, and the cleaning interval can move from monthly toward 6 weeks only if the facade is drawn this way.
Related Reading
- Parametric Facade Design in India: Systems, Materials and Cost per Sq Ft
- Mixed-Use Commercial Facade Design India 2026 Guide
- Facade Fixing Bracket Anchor Into RCC Slab: Survey First
- Unitised vs Stick Facade: India, Dubai and Singapore 2026
- Facade Module Size by Building Height: Dubai, Singapore 2026
Frequently Asked Questions
What is a serviced apartment facade design?
It is the exterior system of an extended-stay tower built around one repeating unit bay, 4.2 m in this concept, so 196 identical studios stack unchanged. Unlike a hotel or residential facade, the module comes from the operator’s plan, and the elevation follows it.
How many degrees does the twist rotate per floor?
Each plate rotates 2.5 degrees about the core, 35 degrees across 14 floors. At the plate end that is a 0.64 m step per floor, and about 8.8 m of cumulative offset from the ground plate by level 14.
What does a precast band and anodised fin facade cost per sq ft in India?
Roughly ₹550 to ₹1,700 per sq ft of elevation in Delhi NCR in 2026, excluding glazing and 18 percent GST. Fins are listed at ₹450-1,450 and precast panels at ₹250-750, widened to ₹350-900 for a cast-in-channel band.
How is a serviced apartment facade different from a hotel facade?
A hotel is bought for arrival and privacy across 1 to 7 night stays, so its facade varies by room type. A serviced apartment repeats one 4.2 m bay for 30 to 180 day stays, so the facade repeats 196 times and can share one mould.
Does a twisting floor plate change the unit layout or the structure?
The unit layout does not change, every studio stays 4.2 m by 8.4 m. The structure does: perimeter columns lean 5.5 to 11 degrees, and services shift about 0.3 m per floor at 7 m from the core, so an engineer must price both.
Want a Serviced Apartment Facade Sized to Your Own Bay?
SOGA Design Studio designs parametric facade concepts for hospitality, residential, office and retail projects across India, Dubai, Singapore and Doha. Send your plot, frontage, structural bay and neighbour condition, and we will test whether a twist earns its place on your tower or a straight box wins. Design concepts are provided under licence to the client, and SOGA retains the underlying design IP.
