What Is a Test Fit and When Do You Need One?

A test fit is a quick layout study. An architect takes the floor plan of a suite you are considering and draws your requirements into it: how many desks, how many meeting rooms and call rooms, where the kitchen and reception go, where a server closet or lab bench could sit. The result is typically a single plan with a seat and room count, sometimes with an alternative layout beside it.

It is not a construction drawing. It has no engineering, no finish selections and no detail a contractor could build from. It is accurate enough to answer three questions: does our team fit, does the layout work the way we work, and how much of what is already there can we keep.

The term is sometimes used loosely for a marketing plan the landlord already has on file. That plan shows a generic tenant. A real test fit uses your program.

A test fit is only as good as the list of requirements behind it, which architects call the program. The program is a written count of spaces: seats by type, enclosed rooms by size, shared areas, technical rooms and storage, with a note on which teams need to sit together and which rooms need privacy or security. Our space planning guide covers how to build the headcount forecast behind it. For the test fit itself, the architect needs the counts.

• ✓How many seats do we need on our busiest day, now and at the end of our planning horizon?
• ✓How many are assigned desks, shared desks and private offices?
• ✓How many small call rooms, mid-size meeting rooms and large rooms?
• ✓Do we need a room that holds the whole company?
• ✓What technical rooms do we need: IT closet, server room, hardware bench, secure area, storage?
• ✓Which teams must sit together, and which need separation or controlled access?
• ✓What do visitors see, and do we need a demo or client area near the entrance?
• ✓Where would additional people go if we grow faster than planned?

If you cannot answer some of these yet, give the architect a range and ask for the layout to show both ends. A plan that shows the suite at today’s headcount and at a fuller future headcount is far more useful than one that shows a single guess.

Square footage is a poor predictor of capacity. Two suites with the same rentable area can hold very different numbers of people, for reasons you cannot see on a listing.

• Load factor: rentable area includes a share of building common areas, and that share differs from building to building, so the usable area inside your walls differs too.
• Floor plate shape: a deep floor with a small window line plans differently from a narrow one. Irregular corners, angled walls and long corridors waste area.
• Columns and core: column spacing limits how desks and rooms lay out, and the position of elevators, restrooms and stairs determines how much circulation you need.
• Windows: the amount of perimeter decides how many people sit in daylight and where enclosed rooms can go without blocking it.
• Existing construction: a previous tenant’s rooms may be reusable, or may be in exactly the wrong places.
• Exits and code limits: the number and position of exits can limit how many people a suite may hold. Your architect confirms this.

Without a test fit, tenants tend to make one of two mistakes. They lease more area than they need because a rule of thumb said so, and pay rent on that excess for the whole term. Or they lease a suite that looked large enough and discover during design that the rooms do not fit, when the lease is already signed. A test fit catches both while changing course is still free.

Compare finalist spaces by cost per seat that fits, using the test fit counts, instead of by rent per square foot. The cheaper rate is not always the cheaper office.

The right moment is after tours have narrowed the field and before you negotiate a letter of intent. Earlier than that, you waste effort on spaces you will drop. Later, you are negotiating size, allowance and expansion rights without knowing what you need.

Order a test fit for each serious finalist, typically a short list and not every space you toured. Using the same architect and the same program for all of them keeps the comparison fair. Test fits are generally quick to produce compared with full design, but ask the architect for timing at the start so the schedule of your search accounts for it.

There are cases where a test fit matters less. A furnished spec suite or a sublease you will occupy as it stands can often be judged by walking it with a seat count in hand. Even then, a simple furniture plan is worth having if you are close to the capacity of the space.

Landlords commonly agree to pay for a test fit for a qualified prospect, because it helps them win the tenant. It is a normal request for your broker to make, though it is a concession and not an entitlement, and it depends on the landlord, the size of the requirement and how serious the interest is.

When the landlord pays, the drawing is usually done by the building’s architect. That architect knows the building well, which is useful, and works for the landlord, which you should keep in mind. Ask whether you may use your own architect with the landlord reimbursing the fee, especially if you expect to keep that architect for the full design. Also ask who owns the drawing and whether you can take the file with you if you choose another building.

If you pay for it yourself, the cost is small relative to the commitment you are about to make, and you control the brief.

A test fit feeds directly into the negotiation. Arranging test fits and using them to shape the proposal is a routine part of the tenant representation work TAG does for technology companies.

1. Check the seat and room counts against your program, including the busiest day.
2. Mark what can be reused and what has to be built, and ask a contractor for a preliminary price.
3. Compare finalists on seats that fit, build-out exposure and total cost, not on area alone.
4. Use the plan to right-size the premises: ask whether the landlord can adjust the suite boundary if you need less or more.
5. Identify where growth would go, and request expansion rights on that specific adjacent space.
6. Attach the agreed plan to the letter of intent or work letter so the build-out terms refer to something concrete.

The last step matters most in a landlord-built deal. A promise to build space to a mutually agreed plan is only as strong as the plan attached to it.