How Much Office Space Does a Startup Need?

Search for this question and you will find plenty of square-foot-per-person figures. We do not offer one here, for two reasons. The same number of people can need very different areas depending on how often they come in and what they do. And the same area can hold very different numbers of people depending on the building, because column layout, window lines, core position and the way the landlord measures the suite all change what fits.

The more useful output of this exercise is a list: seats, rooms and special spaces. A list can be tested against real floor plans. A single area figure cannot, and it tends to send founders toward listings that look right and do not work.

The method below has three inputs and one check. Our longer guide to planning for an AI team goes deeper into hybrid patterns and growth rights. This one is the short version for a founder who needs a defensible first answer.

Start with the plan you are already using for the budget, then adjust it for real estate.

• Write headcount by quarter across the likely length of the commitment, and do it for a low case and a high case.
• Count the people who may use the office, not everyone on the payroll. Fully remote staff in another state do not need a seat, though they may visit.
• Include contractors and interns who come in regularly.
• Note which roles need something other than a desk, such as a lab bench, a private room for recruiting conversations or a space for sales calls.
• Note visitors: investors, customers, candidates and traveling colleagues.

Be skeptical of the high case. Startup hiring plans slip more easily than rent does. If the plan depends on a financing that has not closed, it is worth treating that as a separate scenario.

Hybrid teams do not attend evenly. If most people come in on the same two days, the office has to handle those days, however quiet the rest of the week is. Average attendance understates what you need.

If you already have an office or coworking space, look at badge data or simply count for a few weeks. If you have neither, ask managers which days their teams would really choose, and check that against any company policy.

Then ask where the policy is going. A company that expects to bring people back more often should size for that, or hold a right to grow. Also separate assigned seating from shared seating. If everyone has an assigned desk, you need a desk for everyone, even if they rarely come in. Shared seating reduces the count only if people accept it, and only if the busiest day still works.

Do not plan for the rare all-hands day with desks. Most companies handle those with a large room, or by booking outside space.

This is where a startup's answer differs from an established company's. The right amount of space is limited by how much commitment you can afford if the plan goes wrong.

• Work out the total commitment: monthly occupancy cost multiplied by the months of the term, plus build-out, furniture, moving and any deposit or letter of credit.
• Compare that with your cash runway. A term that extends well past your runway means you are relying on the next raise to pay for it.
• Test the low case. If hiring stalls, what would the unused space cost you, and could you sublease it?
• Compare that with the cost of being too small: a mid-term move, or crowding that hurts hiring.

If the space that fits the plan needs a commitment the runway cannot support, shorten the term, reduce the area, or look at a sublease or flexible space. Your CFO or outside accountant should be part of this conversation, including how a lease would appear on your financial statements.

Here is the arithmetic, using a made-up company. This example is hypothetical, for illustration. It is not a market benchmark, and the attendance figure is an assumption.

Suppose a company has 25 people who may use the office today, plans for 40 at month 18 and 55 at month 36, and expects seven in ten of them on the busiest regular day. That is 28 people at month 18 (40 x 0.70) and about 39 at month 36 (55 x 0.70 = 38.5). Add 2 seats for visitors and the need is 30 seats at month 18 and 41 at month 36.

A sensible next step might be to look at a space that holds about 30 seats comfortably, with a right to expand or a termination option, rather than paying for 41 from the first day. A company with a firmer plan and a shorter search window might reasonably decide otherwise.

Then add everything that is not a desk.

• ✓How many small rooms or phone booths do we need, given how much of our work is on calls?
• ✓How many meeting rooms, and what is the largest group that regularly meets?
• ✓Where does the company gather, if not at desks?
• ✓Do we need reception, or will visitors go straight to the team?
• ✓Is there a kitchen or break area, and what size?
• ✓Do we need a network closet, storage, a lab or a secure room?
• ✓Which of these could we share or book elsewhere rather than build?

Once you have the list, stop thinking in abstract numbers. An architect can draw your list onto the floor plan of each serious candidate. That drawing is called a test-fit, and it shows whether the list works, how much room is left over, and where the design compromises fall.

Test-fits can surprise you. Two suites advertised at the same size can hold different numbers of people, because leases and listings often use a rentable figure that includes a share of common areas, and buildings differ in how much of the area is truly usable. Ask how the suite was measured, and compare seats and rooms, not only square feet.

1. Write the seat and room list for the low and high cases.
2. Shortlist two or three spaces that look like they might fit.
3. Ask an architect for a test-fit of each. Ask up front who pays for it.
4. Compare seats, rooms and total cost per usable seat across the options.
5. Decide how to handle the gap between today and the high case: growth rights, a shorter term, a sublease of the extra area, or a planned move.

We represent tenants, so when a startup works with TAG we can coordinate those test-fits and then negotiate the growth rights or exit rights that let a company take the smaller answer with less risk. The lease terms are often what make the sizing decision safe.