How Much Office Space Do You Need? A Per-Person Guide

Most office searches start with the wrong question. "How many square feet per person?" produces a single number that hides every decision that actually matters: how many people are in on your busiest day, how many of them need a door that closes, how often they meet, and how much of the floor you will pay for but never sit in. Get those answers right and the total area more or less falls out of the arithmetic.

This guide walks through the rules of thumb that space planners use, explains why the area on a lease is usually bigger than the area you can furnish, and finishes with a worked example for a 40-person hybrid team. The figures below are planning ranges, not standards. Local building codes, fire egress rules and the shape of a particular floor all move the answer. Before you commit, ask for a test fit: a scaled layout of your requirements drawn on the actual floor plan. Landlords and agents commonly provide one for serious prospects, and it is the single best way to find out whether a floor works.

Per-person ranges: a sanity check, not a plan

Per-person figures are useful for a first pass and for spotting a floor that is obviously too big or too small. Treat them as ranges, measured on usable area (the space inside your own walls) and divided by the number of people who will be in the office at peak, not your total payroll.

Layout style	Rough usable area per person at peak	Typical of
Dense open plan or benching	About 7–10 m² (75–110 sq ft)	Contact centres, early-stage start-ups, engineering pods
Balanced open plan with meeting rooms	About 10–14 m² (110–150 sq ft)	Most growing companies and hybrid teams
Open plan plus a meaningful number of private offices	About 14–18 m² (150–195 sq ft)	Professional services, finance, client-facing teams
Mostly private offices	About 18–25 m² (195–270 sq ft) or more	Law firms, partnerships, some public-sector tenants

Conventions differ by region. North American brokers often talk about a broad band of roughly 125–250 sq ft per person on rentable area. In the UK, Ireland and much of Europe, planners speak in square metres per workstation. In the dense business districts of Hong Kong, Tokyo and Singapore, tighter layouts are normal because occupancy costs are high. Wherever you are, the lower limit is set by regulation rather than comfort: fire egress widths, occupancy limits, washroom fixture counts and, in some countries, minimum space rules for workers. The UK's workplace regulations guidance, for example, sets a minimum room volume per person.

Build it up from the components

A better method than per-head multiplication is to list what you need and add it up. Planners call this a space programme, and it takes an afternoon with a spreadsheet.

Workstations

A standard desk of around 1.4–1.6 m wide, with room for the chair and the aisle immediately beside it, takes roughly 4.5–6.5 m² (50–70 sq ft). Benching rows sit at the low end. L-shaped desks, storage pedestals, dual-monitor arms and wider aisles push you toward the high end.

Private offices

A single-person office typically runs about 9–14 m² (100–150 sq ft); a manager's office with a small meeting table, 14–20 m² (150–215 sq ft). Private offices are the biggest driver of area per head. Placed along the windows they also steal daylight from everyone else, which is why many companies now put them on the core side of the floor and leave the perimeter open.

Meeting and focus space

Allow roughly 2–2.5 m² (20–27 sq ft) per seat in a meeting room, and plan one enclosed meeting room for every 8–12 people in the office at peak, plus one phone booth or focus room for every 6–10. Mix the sizes: plenty of two-to-four seat rooms, a few six-to-eight seat rooms and one larger room that can hold a team meeting or a client presentation. Hybrid teams usually need more of this space, not less. When half of every meeting happens on video, people need somewhere acoustically private to join.

Support space and circulation

Reception and waiting, a kitchen or breakout area, print and storage, a comms room for network equipment, lockers for people without a fixed desk, and a wellness or parents' room. Together these typically take 15–25% of the net area you have listed. Then add circulation: the corridors and aisles connecting everything usually add another 25–35% on top. Forgetting circulation is the most common reason a home-made estimate comes out too small.

Open plan, private offices or hybrid?

Your layout model matters more than any per-person figure, so decide it first.

• Open plan is the most area-efficient and the easiest to reconfigure as teams change. It needs good acoustics, enough enclosed rooms to escape to, and a clear etiquette around calls. Skimp on the rooms and the savings evaporate in lost focus.
• Private offices suit work that is confidential (legal, HR, some finance), heavy on calls, or where offices are part of the culture. Expect close to double the area per head of open plan, and higher fit-out and reinstatement costs because every wall has to be built and, often, removed at the end of the lease.
• Hybrid or activity-based layouts give up some assigned desks in exchange for a wider range of settings: team neighbourhoods, bookable desks, booths, project rooms and quiet zones. Desk counts fall, but some of the saved area goes into collaboration space, so the overall reduction is smaller than the desk ratio suggests.

Most companies end up with a blend: open plan for the majority, a handful of private offices for roles that genuinely need them, and a generous supply of small rooms.

Hybrid work: plan for the peak, not the average

Hybrid sizing usually starts with a desk-sharing ratio, expressed as desks per employee. Ratios of around 0.6–0.8 are common planning assumptions, but your own data beats any rule of thumb. Look at badge or booking data, or run a simple headcount every day for two or three normal weeks, and note the busiest day. In many offices that is midweek.

Then size for the peak. If you mandate anchor days when whole teams come in together, your peak may be close to full headcount on those days, and a low desk ratio will leave people standing. A practical approach is to provide workstations for peak attendance plus a small margin of around 5–10% for visitors, new joiners and the inevitable day when two teams pick the same date. Size meeting rooms and booths for the peak too, because that is when they are in demand.

Growth buffer: buy space or buy rights?

Write down a realistic hiring plan for the length of the lease, not just the next quarter. A common approach is to carry a growth buffer of around 10–20% to cover two or three years of expected hiring. Beyond that you are paying rent, service charges and fit-out costs on empty desks for a long time before you fill them.

The alternative is to buy flexibility through the lease rather than through floor area: a right of first offer or refusal on adjacent space, an expansion option, a break clause, or permission to sublet part of the floor if you shrink. A small overflow membership at a nearby coworking space can also absorb a temporary peak. These rights are negotiable, and our guide to negotiating office rent covers how to ask for them. If you are taking space on a shorter horizon, subleasing or a flexible office may fit better than a long lease with a big buffer.

Usable versus rentable: the load factor

The area you plan with is not always the area you pay for. In many markets, rent is charged on a figure that includes a share of the building's common areas, so the quoted size of a floor is larger than the space you can furnish.

• US and Canada. Rent is typically quoted on rentable area. Rentable equals usable multiplied by one plus the load factor (sometimes called the add-on factor), which covers your share of lobbies, shared corridors, washrooms and plant rooms. Measurement usually follows standards published by the building owners' association BOMA. A partial floor in a multi-tenant tower carries a higher load than a full floor, because you share more common corridor.
• UK and Ireland. Offices are generally let on net internal area, broadly the usable space inside the building's structure. Common parts are excluded from the rentable figure and recovered through the service charge instead, so you still pay for them, just on a different line.
• Continental Europe. Several national measurement standards are in use, and some include a share of common areas in the rentable figure. Ask which one a quote is based on.
• Asia-Pacific. Hong Kong office space is commonly quoted on gross area, with an efficiency ratio telling you how much of it is usable. Singapore and Australia generally quote net lettable area. Japanese rents are quoted per tsubo (about 3.3 m²). In India, quotes on super built-up area can include substantial loading over the carpet area you can actually use; see our notes on Mumbai and Bengaluru.

Whatever the market, ask three questions of every quote: which measurement standard was used, what the usable or carpet area is, and whether you have the right to remeasure. Comparing two floors on headline size alone is how tenants end up paying for corridors.

A worked example: 40 people, hybrid

Here is a space programme for a 40-person company with three leadership and HR roles that need private offices, a peak in-office day of about 30 people, and modest growth expected over a five-year lease. The figures use the mid-points of the ranges above.

Component	Assumption	Usable area
Workstations	27 peak desk users plus a 10% margin, so 30 desks at about 5.5 m² each	165 m² (1,776 sq ft)
Private offices	3 at about 11 m² each	33 m² (355 sq ft)
Large meeting room	12 seats at about 2.3 m² per seat	28 m² (301 sq ft)
Medium meeting room	8 seats	18 m² (194 sq ft)
Small meeting rooms	2 rooms of 4 seats at about 10 m² each	20 m² (215 sq ft)
Phone booths and focus rooms	4 at about 2.5 m² each	10 m² (108 sq ft)
Kitchen and breakout	Seating for a lunch crowd and an all-hands	40 m² (431 sq ft)
Reception and waiting	Small, as most visitors come for meetings	15 m² (161 sq ft)
Print, storage, lockers, comms room	Lockers for 40, a ventilated comms cupboard	16 m² (172 sq ft)
Net subtotal		345 m² (3,714 sq ft)
Circulation	About 30% of the net subtotal	About 105 m² (1,130 sq ft)
Usable area needed today		About 450 m² (4,840 sq ft)
Growth buffer	10%, backed by an expansion right for anything beyond	About 45 m² (484 sq ft)
Usable area to search for		About 495 m² (5,330 sq ft)
Load factor (rentable-area markets only)	15%, typical of a partial floor in a multi-tenant building	About 74 m² (797 sq ft)
Rentable area you would be quoted		About 570 m² (6,130 sq ft)

Two things stand out. First, the result is about 15 m² of usable area per peak occupant, which lands in the "open plan plus private offices" band rather than the balanced open-plan band, because of the three offices and the generous meeting space. That is fine, as long as it is a choice. Second, the gap between the 450 m² this team needs today and the 570 m² a North American landlord might quote is more than a quarter, made up of growth and load. If the budget is tight, those are the two numbers to challenge before you start cutting meeting rooms.

Run your own figures through the office space calculator, then hand the programme to whoever draws your test fits.

Common sizing mistakes

• Sizing on total headcount. If you are hybrid, plan to your measured peak, not your payroll.
• Ignoring the floor plate. Columns, a deep floor with little daylight at the centre, or an awkward core can make one floor hold noticeably fewer desks than another of the same size. That is what test fits reveal.
• Too few small rooms. The large boardroom is used twice a week; the two-person rooms are booked solid. Weight your meeting space toward small rooms.
• Buying a decade of growth up front. Space you will not fill for years costs rent, service charges, fit-out and, eventually, reinstatement. Negotiate expansion rights instead.
• Comparing quotes on different measurement bases. Convert every option to usable area before comparing price or size.
• Forgetting occupancy limits. Fire codes and washroom fixture counts cap how many people a floor can legally hold. A dense plan may need building upgrades, or may not be permitted at all.

A good tenant representative will run this exercise with you as part of a search; our guide to tenant rep brokers explains what to expect from one.