A commercial office lease is usually a five- to nine-year commitment, and the single most expensive number in it — total chargeable area — gets fixed long before the first design drawing is issued. Size it 15% too generously and you pay rent, CAM charges and fit-out cost on space nobody ever sits in. Size it too tight and you are re-planning the floor within 18 months. Yet most companies still arrive at that number the same way: headcount multiplied by a figure someone half-remembers from the last office.
There is a more reliable way to work out how much office space you need per employee — and it starts by not using headcount at all.
What “square feet per employee” actually looks like in India
Workplace density has tightened everywhere over the last decade. In the US, average allocation fell from roughly 225 sq ft per employee in 2010 to about 150 sq ft by 2024. Indian benchmarks sit lower still — partly a layout convention, partly because chargeable rents make every square foot count.
- Startups and product teams: roughly 70–90 sq ft per employee
- Grade A corporate offices: roughly 90–120 sq ft per employee
- Large enterprises with more cabins and meeting rooms: roughly 130–160 sq ft per employee
- For comparison: Singapore and Hong Kong plan at 80–100 sq ft; Japan at 65–80 sq ft
Treat these as sanity checks, not design inputs. A 100-person company with eight cabins, a 20-seat boardroom and a client-facing reception will land in a completely different band from a 100-person engineering team on open benches — even on the same floor plate.
Start with attendance, not headcount
Hybrid working broke the one-desk-per-person assumption, and most 2026 space plans now allocate somewhere between three and seven desks for every ten employees, depending on how often people actually come in. Headcount tells you how many people you employ. Attendance tells you how many need a seat on a Wednesday.
A workable sequence: take peak-day attendance (almost always Tuesday to Thursday), add a 10–15% comfort margin so the floor never feels full, then add a 10–20% growth buffer sized to the lease term rather than to the business plan. If your badge or booking data is thin, count occupied desks manually for three weeks before you commit to a number.
Build the area from the bottom up
Once you know how many desks you are planning for, everything else follows from a component list rather than a rule of thumb:
- Workstation: 45–50 sq ft dense, 55–65 sq ft standard, 70–80 sq ft spacious
- Cabin: 100–150 sq ft depending on whether it seats visitors
- Meeting rooms: about 150 sq ft for a 4–6 seater, 350–500 sq ft for a boardroom; plan roughly one small room per 15–20 desks
- Reception and waiting: 200–400 sq ft
- Pantry and breakout: 8–12 sq ft per person
- Server, storage and utility: 5–8% of total area
- Circulation: add 15–20% on top of everything above
A worked example: 120 employees
Say you have 120 people, hybrid, with peak-day attendance around 70%. That is 84 people on the busiest day; add a comfort margin and you plan for 90 desks, not 120.
- 90 workstations at 55 sq ft = 4,950 sq ft
- 8 cabins at 110 sq ft = 880 sq ft
- 4 small meeting rooms + 1 boardroom = 1,000 sq ft
- Reception and waiting = 300 sq ft
- Pantry and breakout = 900 sq ft
- Server, store and utility = 400 sq ft
That subtotal is about 8,430 sq ft. Add 20% circulation and you need roughly 10,100 sq ft of carpet area — around 84 sq ft per employee, or 112 sq ft per desk. Note how different those two figures look, and how easily a vendor quote can quietly use one while you are thinking of the other.
The carpet vs chargeable area trap
This is where Indian office sizing goes wrong most often. Rent is charged on chargeable (super built-up) area, which includes your share of lobbies, lifts, staircases and services. Loading factors typically run 25–40%. Our 10,100 sq ft carpet requirement becomes roughly 13,600 sq ft chargeable at a 1.35 loading — a 3,500 sq ft difference you will pay rent on for the whole lease term.
Meanwhile your fit-out cost is driven by carpet area, not chargeable area. Two buildings quoting the same rent per sq ft can differ by 10% in real cost simply because one has a leaner core. Always ask for carpet, built-up and loading factor in writing before you compare options, and read them alongside a realistic fit-out cost per square foot benchmark. The condition of the space matters just as much — our comparison of bare shell, warm shell and plug-and-play space shows how the same area can carry very different capex.
Four sizing mistakes that cost real money
- Sizing to payroll headcount instead of peak attendance, then paying rent on 30 empty desks.
- Leaving circulation out of the early maths, so the layout only fits once meeting rooms get cut.
- Comparing a chargeable-area figure with a carpet-area figure across two buildings and calling it a like-for-like shortlist.
- Signing before a test fit — discovering the column grid will not take your bench depth after the lease is executed.
Test-fit before you sign
A test fit — a quick block layout drawn on the actual floor plate you are considering — costs a fraction of one month’s rent and routinely changes the shortlist. It tells you whether the core position wastes a corner, whether the column grid suits your workstation module, and whether that “12,000 sq ft” option really seats your team. It also feeds straight into the programme, which matters when you are working back from a move-in date; our week-by-week fit-out timeline shows how early that decision needs to land.
AirBrick Infra’s space planning services cover exactly this stage — zoning, density modelling and test fits on shortlisted floor plates — before it hands over to design and build delivery. If you are sizing an office right now, talk to our team before the lease is signed, not after.
