For most urban Indian families, the apartment is now the default home. In Mumbai, Pune, Bengaluru, Hyderabad, Ahmedabad and Surat, independent houses on individual plots are increasingly out of reach in the city's core, and the choice is between towers — affordable, mid-segment or premium — on the city's growing edges. At the same time, land prices, construction costs and EMIs push developers and buyers towards more compact units, while family life demands more of every square foot: a home office, a room for visiting parents, space for a child's online classes, a gym corner, a place to dry clothes.
The result is a quiet revolution in apartment design. The question is no longer only "how many BHK?" but "how many uses per room?" A flat that would once have been judged by its size is now judged by its plan: whether its corridors are wasted, whether the kitchen opens to the living area, whether a bedroom can work as a study, whether services can be changed without breaking concrete. Many buyers still compare projects on super built-up area and the number of bedrooms, and miss the features that decide whether a compact flat will live well.
This article traces how the Indian apartment evolved, explains why flats are getting smaller, and sets out what a smaller, smarter and more flexible apartment looks like — with dimensioned plans, furniture sizes, construction realities such as aluminium-formwork (Mivan) walls, and indicative October 2026 costs.
How the Indian apartment got here
Multi-family housing in Indian cities is older than many people assume. In late nineteenth- and early twentieth-century Bombay, the chawl — rows of single rooms along a shared gallery with common toilets — housed mill workers and clerks by the hundreds of thousands. In the 1930s, the same city built Art Deco apartment blocks along Marine Drive and in other new neighbourhoods, with separate rooms, private bathrooms and balconies — the prototype of the middle-class flat. After Independence, public bodies such as state housing boards and the Delhi Development Authority (set up in 1957) built large estates of walk-up flats to standard type plans, which fixed many of the room sizes still found in bye-laws.
From the 1990s, private developers took over and the tower arrived: lifts, gated compounds, clubhouses and amenities, with flats sold on super built-up area — a figure that included a share of lobbies, staircases and amenities and could be far larger than the space a family actually lived in. The Real Estate (Regulation and Development) Act, 2016 changed that by requiring sales on carpet area, defined as the net usable floor area of the flat excluding external walls, service shafts, exclusive balconies and open terraces but including internal partition walls. That one definition made comparisons honest and put planning efficiency in the spotlight.
Why new flats are getting smaller
Several forces push in the same direction. Land in established city areas is scarce and expensive, and construction costs have risen. Buyers are constrained by EMIs rather than by their wish for space, so developers design to a price point, and a price point divided by a city's rate per square foot gives a carpet area. Government schemes reinforce compact sizes: under the Pradhan Mantri Awas Yojana (Urban), homes for economically weaker sections are defined up to 30 m² of carpet area and lower-income homes up to 60 m². Transit-oriented development policies, such as the National Transit Oriented Development Policy of 2017, encourage denser housing near metro and rail corridors, where higher permissible floor area typically means more, smaller homes rather than fewer large ones.
Households have changed too. Census data over recent decades has shown Indian household size gradually declining as more families live as nuclear units, many young professionals rent or buy alone or as couples, and a growing number of elderly parents live independently near, rather than with, their children. Those households need fewer, more versatile rooms. Since 2020, working from home has added a new requirement that many existing flats were never planned for: a quiet place to work with a door, a desk and good light.
| Flat type | Typical mid-segment carpet area (this blog's standard ranges) | Compact and affordable projects (indicative) | What the compact version usually gives up |
|---|---|---|---|
| Studio / 1RK | 300–400 sq ft | 200–300 sq ft | Separate kitchen; often a combined living–sleeping room |
| 1BHK | 400–600 sq ft | 320–450 sq ft | Dining space, a second toilet, generous balcony |
| 2BHK | 600–1,000 sq ft | 550–700 sq ft | Second attached toilet, separate dining, utility area |
| 3BHK | 1,000–1,500 sq ft | 800–1,050 sq ft | Bedroom sizes drop to 9–10 ft widths; small kitchen |
| 4BHK | 1,500–2,500 sq ft | 1,250–1,500 sq ft | Separate family lounge, servant room |
Smaller is not automatically worse. A 650 sq ft flat with no wasted passages, a kitchen that opens to the living area and a flexible second bedroom can be more usable than an 800 sq ft flat with a long corridor, a closed kitchen and awkward room shapes. The difference is planning — and planning efficiency is now the most valuable thing an architect or interior designer can add to a compact home.
Smarter: planning moves that make a compact flat live larger
Five planning moves recur in well-designed compact flats. First, no corridor: rooms open off the living space or a short lobby, so circulation is shared with living area instead of being dead floor. Second, a stacked wet core: kitchen, bathrooms and utility are grouped against one service shaft, which shortens plumbing, keeps wet areas together and frees the rest of the plan for dry rooms. Third, an open or semi-open kitchen that borrows space and light from the living area, separated if needed by a glass partition or a sliding shutter to manage cooking fumes. Fourth, storage built into walls rather than standing in rooms: full-height wardrobes, a storage wall in the living room, beds with drawers, lofts used intelligently. Fifth, one room designed to change use.
The plan in Fig. 2 has an internal area of 8100 × 7200 mm, about 58 m² or roughly 630 sq ft before deducting walls — the size of a typical compact 2BHK. It contains one double bedroom of 3300 × 3300 mm, a 1500 × 2400 mm bathroom off a small lobby, an open kitchen of 2700 × 3900 mm with an L-shaped counter, a combined living and dining space of 5400 × 3900 mm, and a flex room of 3300 × 3300 mm. The flex room is the key. Its wall to the living area is a full-height sliding partition: open, it adds about 10.9 m² to the living space for daytime work, play or guests; closed, it becomes a private bedroom with a wall bed. A conventional plan of the same area, with a corridor and a closed kitchen, would typically lose a few square metres to circulation and make both bedrooms feel smaller.
A compact plan also needs a compact bathroom strategy. Many affordable 2BHKs offer only one bathroom, which is workable for a small family if the WC can be separated from the shower area or a second WC fitted near the entrance. Where two toilets are given, stacking them back-to-back on one shaft is far better than scattering them, both for cost and for future maintenance.
Flexible: rooms that change with the day and the decade
Flexibility works at two time scales. Daily flexibility lets one room serve different uses in a day — a study that becomes a guest bedroom, a living room that becomes a home office, a dining table that extends for festivals. Long-term flexibility lets the flat change over years — a nursery that becomes a teenager's room, two small bedrooms that merge into one large one when the children leave, a bathroom adapted for an elderly parent. Good design for the future plans for both.
The idea has a long pedigree in architecture. In the 1960s, the Dutch architect John Habraken argued in his book Supports that housing should separate the long-lived structure and shared services — the support — from the internal partitions and fit-out — the infill — which residents should be able to change. That principle, known as open building, has been used in housing projects in several countries. Indian apartments are rarely designed this way, but its logic applies to every interior decision: anything built into the structure is permanent; anything that can be unscrewed, slid or moved keeps the home adaptable.
| Layer | Life span (typical) | Who decides | Design for the future |
|---|---|---|---|
| Structure — columns, slabs, shear walls | 50 years and more | Developer, structural engineer | Never cut or chase without an engineer's approval |
| Shafts and risers — water, drainage, gas, electrical | Decades | Developer, MEP consultant | Keep wet rooms beside shafts; leave access panels |
| Partitions — internal walls | 10–30 years | Owner and designer | Prefer drywall, sliding or folding partitions where a change is likely |
| Built-in joinery — kitchen, wardrobes | 10–20 years | Owner and designer | Modular units that can be dismantled and refitted |
| Loose furniture and lighting | 5–15 years | Owner | Choose multifunctional pieces; plan sockets and light points generously |
| Finishes — paint, wallpaper, soft furnishings | 3–10 years | Owner | Neutral base; change colour and fabrics as needs change |
Fig. 3 shows the flex room in its two modes. By day, the wall bed is folded into a cabinet about 450 mm deep, the sliding partition is stacked open, and the room becomes a study and an extension of the living area with a desk of 1200 × 600 mm and a sofa-bed or two chairs. By night, the partition closes, the bed comes down and the room is a private bedroom with about 850 mm of clear floor at the foot of the bed. The figures are typical of vertical queen wall-bed systems; each manufacturer specifies its own cabinet size, wall fixing and clearances, which should be checked before the room is planned.
| Flexible element | Typical size | Best use | Indicative cost (October 2026) | Watch out for |
|---|---|---|---|---|
| Vertical wall bed, queen, with cabinet | Cabinet about 1650–1750 wide × 450–500 deep | Guest room, study that sleeps | Mechanism plus cabinet often ₹60,000–2,00,000 — confirm with suppliers | Needs a solid wall; mechanism quality decides safety |
| Sliding partition, aluminium and glass | Panels 600–900 wide, floor to ceiling | Flex room to living; kitchen screen | Get a written quote — varies with glass and track system | Bottom track cleaning; acoustic leakage |
| Storage wall with fold-down desk | Depth 450–600 | Living room or bedroom office | Within wardrobe rates of ₹1,200–2,200 per sq ft of elevation (mid-range) | Desk height 720–760; cable routing |
| Extendable dining table | 4-seat closed, 6–8 seat open | Festivals, guests | Varies widely by material and mechanism | Leaf storage; floor space when open |
| Bed with hydraulic storage | Queen 1524 × 1981 mattress | Every compact bedroom | Get a written quote | Lift quality; access for heavy items |
| Sofa-bed | Seat depth 550–650; bed 1200–1500 wide | Living room or study guests | Varies widely | Comfort as a bed is often poor — test before buying |
Construction realities: Mivan walls and what they mean for interiors
A growing share of Indian towers is built with aluminium formwork systems, widely called Mivan after one early supplier. Walls and slabs are cast together in concrete, floor by floor, using reusable aluminium moulds, which makes construction fast and the finish smooth enough to need little plaster. For interiors, it changes the rules. The internal walls are often reinforced concrete rather than brick, so electrical conduits, switch boxes and plumbing sleeves must be placed inside the formwork before concrete is poured. Once cast, walls cannot be freely chased for new wiring, and many of them are structural, so they cannot be broken or cut to merge rooms.
For a buyer, the practical advice is to get involved early. Many developers using aluminium formwork offer a window during construction in which the buyer can request changes to electrical points; after casting, the options are surface conduits, joinery that hides wiring, or a thin dry-lined zone on one wall that carries new points. Heavy items — wall beds, TV mounts, overhead cabinets — can be fixed to concrete walls with suitable anchors, but drilling should be planned to avoid reinforcement and embedded conduits, ideally after scanning the wall. Most importantly, no concrete wall in such a building should be cut or removed without the structural engineer's written approval.
Services, energy and accessibility: the quiet upgrades
Future-ready apartments differ from today's less in their looks than in their services. Electric-vehicle charging is the clearest example: the Ministry of Housing and Urban Affairs amended the Model Building Bye-Laws in 2019 to provide for EV charging infrastructure in buildings, and several states and cities have since adopted provisions for new projects. For an owner, the immediate question is whether the parking space has, or can get, a dedicated metered supply. Inside the flat, generous socket provision, a dedicated circuit for a home office, a network cabinet near the living room and conduits to every room for data are inexpensive at the design stage and costly later.
Energy is the second upgrade. The Bureau of Energy Efficiency's Eco-Niwas Samhita of 2018, the residential part of India's Energy Conservation Building Code, sets out envelope requirements to limit heat gain through walls, roofs and windows. Interiors cannot change the envelope much, but they can help: light-coloured blinds and curtains on west windows, efficient inverter air-conditioners with sensibly sized ducts and drains planned in advance, BEE star-rated fans and appliances, and LED lighting with zoned switching all reduce bills in a compact home where every degree of heat is felt.
Accessibility is the third. More Indian families now plan for elderly parents, and many will themselves age in the same flat. The Harmonised Guidelines and Standards for Universal Accessibility in India, 2021, issued by the Ministry of Housing and Urban Affairs, set out dimensions for accessible design. In a home, the most useful measures are simple: doors with a clear width of at least 900 mm where possible, level or ramped thresholds rather than a step into the bathroom, grab bars or the wall blocking to add them later, slip-resistant bathroom floors, switches reachable from the bed, and good lighting in passages at night.
| Future-ready feature | Why it matters | When to plan it | Indicative cost (October 2026) |
|---|---|---|---|
| EV-ready parking supply | Home charging without later disputes | At purchase; ask the developer | Depends on society and DISCOM — get a written quote |
| Data conduits and a network point in every room | Work from home, smart devices, TV | Electrical design stage | Small at design stage; costly after finishes |
| Dedicated home-office circuit and good task light | Reliable power and comfort for long working hours | Electrical design stage | Panel lights ₹400–1,200 each; LED strip ₹150–300 per running ft |
| Level bathroom threshold and grab-bar blocking | Ageing in place; fewer falls | Civil and tiling stage | Small when planned; high if retrofitted after tiling |
| Doors 900 mm clear where possible | Wheelchairs, walkers, moving furniture | Civil stage | Little extra in a new flat |
| Sliding partitions instead of fixed walls in one room | Room can change use | Design stage | Get a written quote; compare with drywall |
| Wall storage to ceiling, lofts kept light | Floor space stays clear | Joinery design | Mid-range wardrobes ₹1,200–2,200 per sq ft of elevation |
New ways of living: co-living, senior living and rental homes
The future apartment is not only a smaller version of today's family flat. New forms are appearing alongside it. Co-living buildings offer private rooms or studios with shared kitchens, lounges and workspaces, mostly for young professionals and students. Senior-living communities provide apartments designed for older residents, with accessible bathrooms, emergency call systems and shared services. Purpose-built rental housing is encouraged by the Model Tenancy Act, 2021, which aims to formalise and balance landlord–tenant relationships. Each of these changes what an apartment interior must do: durable finishes and simple maintenance for rental units, privacy and acoustic separation for co-living, safety and ease of use for senior living.
For interior designers, the common thread is that the apartment is becoming a product designed for a lifecycle, not a one-time decoration. Aaditya Interior sees this most clearly in hospitality projects, where rooms must survive constant use and be refreshed without rebuilding; the same thinking — robust base, replaceable layers, services with access — is moving into homes. The likely future is not dramatically smaller flats everywhere, but flats in which every square foot is designed to do more than one job, and every element is designed for the next change as well as the first use.
Checklist: buying or designing a compact flat
- Compare projects on RERA carpet area, then on how much of it is corridor; a plan with almost no passage beats a larger plan with a long one.
- Check that bathrooms and kitchen sit against shared shafts, and that every wet area has a window or a mechanical exhaust.
- Look for one room that can change use: a door wide enough, a wall long enough for a wall bed or storage, and a window for daylight.
- In an aluminium-formwork building, finalise switch, AC and TV points before casting, and never cut a concrete wall without the structural engineer's approval.
- Build storage into walls to ceiling height and keep floors clear; avoid bulky free-standing furniture in rooms under 10 ft wide.
- Plan data, office power and task lighting in every room that could become a workspace.
- Plan for age: level thresholds, slip-resistant bathroom floors, blocking for grab bars and doors as wide as the plan allows.
- Ask about EV charging provision for the parking space before buying, not after.
Frequently asked questions
Are Indian flats really getting smaller?
Compact units have become a large part of new supply in many cities, especially in affordable and mid-segment projects and near transit corridors, while premium projects still offer large homes. The more useful question for a buyer is how efficiently a flat's carpet area is planned, because two flats of the same size can differ greatly in usable space.
Is a 600 sq ft 2BHK enough for a family of four?
It can be, if the plan wastes no space on corridors, the kitchen opens to the living area, storage is built into walls and one bedroom is designed to be flexible. It becomes tight if there is only one bathroom and no utility space, so check those two items carefully.
Are wall beds safe and practical in Indian homes?
Good wall beds from established manufacturers, fixed to a solid wall with the specified anchors, are safe and used daily in many countries. Choose a proven mechanism, check the weight rating, keep the area in front clear, and have it installed by the supplier's trained team rather than a general carpenter.
Can walls be removed in a Mivan flat?
Usually not. In aluminium-formwork buildings, most walls are cast reinforced concrete that forms part of the structure. Removing or cutting them can endanger the building and is not permitted without the structural engineer's and society's written approval. Plan changes around them with joinery, sliding partitions and surface services.
What is the most important feature of a future-ready apartment?
Adaptability. A plan with a flexible room, services placed so they can be extended, partitions that can be moved and joinery that can be refitted will serve the family for longer than any particular finish or gadget.
Sources & standards
- Real Estate (Regulation and Development) Act, 2016 — Section 2(k), definition of carpet area
- Ministry of Housing and Urban Affairs — Pradhan Mantri Awas Yojana (Urban) guidelines: carpet-area limits for EWS and LIG houses
- Ministry of Housing and Urban Affairs — National Transit Oriented Development Policy, 2017; Model Building Bye-Laws 2016 and 2019 amendment for EV charging infrastructure
- Bureau of Energy Efficiency — Eco-Niwas Samhita 2018 (Energy Conservation Building Code for Residential Buildings)
- Ministry of Housing and Urban Affairs — Harmonised Guidelines and Standards for Universal Accessibility in India, 2021; Model Tenancy Act, 2021
- N. J. Habraken — Supports: An Alternative to Mass Housing (open building principle)
- Bureau of Indian Standards — National Building Code of India 2016, Part 3 (Development Control Rules and General Building Requirements) and Part 6 (Structural Design)
- Price ranges: indicative October 2026 estimates — confirm locally before budgeting
