Space Planning for Growing Commercial Tenants

The request usually arrives as a number. Someone in leadership says the company needs about ten thousand square feet, and by the time anyone asks where the number came from, three buildings have been toured and a broker is drafting a letter of intent.

The number is almost always wrong, and it is wrong in a specific way. It was derived by taking the current headcount, multiplying by the square footage per person the company has today, and adding a margin for growth. That arithmetic assumes the way the company uses space now is the way it should use space next — which is exactly the assumption a move is an opportunity to revisit, and the one nobody revisits once a lease is signed.

Space planning is the discipline that replaces the guess with a program. Done before the lease rather than after it, it changes which buildings are worth touring, what the fit-out will cost, and whether the space still works in year four. Levaru provides space planning for tenants and owners across the DMV as part of our projects and construction practice, and the sequence below is the one we run.

What does space planning actually decide?

Space planning is often described as drawing a floor plan. The drawing is the output, not the work. The work is a series of decisions the drawing records:

• How much space you need, expressed as a program rather than a total.
• What kinds of space — enclosed offices, open workstations, meeting rooms of different sizes, quiet rooms, labs, storage, server, pantry, reception.
• How those spaces relate — who needs to sit near whom, what has to be near the entry, what must be away from noise.
• What the building has to provide to make it work — column spacing, ceiling height, window line, floor loading, power and cooling, exit paths.
• What it will cost to build, which is where the plan meets the lease’s tenant improvement allowance.

Each of those is a decision a tenant can make deliberately in advance or discover late, at a cost. A company that skips the program and signs on a total finds out in design development that the number was right and the shape was wrong: the space is large enough and cannot hold six conference rooms because the window line and the core do not allow it.

How much space does a growing company actually need?

The honest answer is that it depends on how the company works, and the purpose of programming is to make that dependency explicit before it becomes a lease obligation.

Planning conventions exist and are useful as a starting point. Workspace planners work from ranges — a private office that fits a desk, storage, and two guest chairs occupies a fairly predictable footprint; a benching workstation occupies a much smaller one; a conference room’s size follows from the seat count and the clearance around the table. Those ranges are a sanity check on a program, not a substitute for one, and they have moved considerably over the last decade as open plans, hoteling, and hybrid schedules changed what a “seat” means.

The variable that moves a program most is not headcount. It is the ratio of enclosed to open space and the amount of meeting capacity the company actually uses. A firm of the same size can land in very different footprints depending on whether its people mostly sit at desks or mostly sit in rooms with other people.

A defensible program answers these before it produces a total:

• Headcount today, and by function. Not one number — a table by team, because teams have different space profiles.
• Growth, with a date attached. “We might double” is not a program input. “Sales adds six seats in the second half of next year” is.
• Attendance reality. If a hybrid policy means peak-day occupancy runs well below badged headcount, planning to badged headcount buys space that is empty every day of the week.
• Meeting demand. Count the meetings the company actually holds by size. Most tenants discover they are short on two-to-four-person rooms and long on ten-person rooms.
• Special space. Labs, secure rooms, sample storage, and equipment rooms drive building selection more than office count does, because not every building can host them.
• Support space. Pantry, copy, IT, storage, and circulation are real square footage and are routinely left out of the tenant’s own estimate.

What is a test fit, and why does it come before the lease?

A test fit is a preliminary space plan drawn on a specific building’s floor plate, showing whether your program fits and what it looks like when it does. It is the single most useful document a tenant can have during a search, and it is usually available before any commitment is made.

Its value is comparative. Two floors that both advertise the same rentable square footage can hold materially different programs, because the shape, the core position, the column grid, and the window line differ. A test fit turns “these two buildings are about the same size” into “this one holds your program with a spare room, and this one costs you two offices or a conference room.”

It also prices the work. A test fit against a specific existing condition shows how much demolition the plan requires, whether the existing ceiling and lighting can be reused, whether ductwork has to be reworked to serve a new room layout, and whether the plan pushes into a sprinkler or exit-path change. Those are the line items that decide whether the landlord’s tenant improvement allowance covers the build or whether the tenant funds the difference out of pocket.

Run the test fit while there is still leverage. Once the lease is executed, an unfavorable answer is information you pay for rather than information you negotiate with.

Usable, rentable, load factor — what are you actually paying for?

This is where tenants most often lose money they never see leave, and it is arithmetic rather than judgment.

Usable square feet is, broadly, the area inside your demised premises — the space your plan can occupy. Rentable square feet is that number plus your proportionate share of the building’s common areas: lobbies, corridors, restrooms, mechanical rooms. Rent is quoted on rentable. Your program fits into usable.

The ratio between them is the load factor (also called the add-on or core factor). A load factor is not a fee and not a markup — it is a method for distributing the cost of shared building area across tenants, and it is normal and expected. What matters is that two buildings quoting the same rent per rentable square foot are not quoting the same price for the space you can actually use, and the one with the higher load factor is more expensive for the same program.

Two practical consequences:

• Compare on usable, not rentable. Take your program’s usable requirement, apply each building’s load factor, and compare the resulting annual cost. Buildings with generous lobbies and multiple elevator banks often carry higher load factors than efficient, simple floor plates.
• Ask how the measurement was done. Office space is commonly measured to a published standard — the BOMA/ANSI Z65.1 family is the one most often referenced in US office leases — and different editions of that standard measure differently. A lease that names the standard and the edition is a lease where the number can be checked. One that just asserts a square footage is one where it cannot.

A full-floor tenant sits in a different position again, since a full floor’s common areas are largely yours to use. Multi-tenant floors, by contrast, give up area to shared corridors that the load factor is meant to account for.

How do you plan for growth you cannot yet size?

Growth is the reason most tenants are moving, and it is the part of the program that is hardest to state honestly. Overbuying is expensive on day one. Underbuying is expensive in year three, and considerably more disruptive.

The planning answer is to separate growth you can size from growth you cannot, and to handle them with different instruments.

Growth you can size — the seats a hiring plan already commits to — belongs in the program. Plan the space, build it, and accept the carrying cost, because the alternative is a second construction project inside an occupied office.

Growth you cannot size is a lease problem more than a plan problem, and it is addressed with rights rather than square footage:

• Expansion options and rights of first offer on adjacent space give you a claim on the space next door without paying for it now. Their value depends entirely on the specifics — which space, for how long, at what rent, and what notice you owe.
• Contraction and sublease rights matter as much in the other direction, and tenants negotiate them far less often. A right to sublease that the landlord may not unreasonably withhold consent to is a meaningful exit valve.
• Term structure. A shorter initial term with renewal options costs something in rate and buys flexibility. Whether that trade is worth it is a business decision, but it should be a decision rather than a default.

The plan itself can also be built to flex. Designing a floor so that a zone of open workstations can be converted to enclosed rooms later — running power and data to support both, placing the ductwork so a wall can land where it needs to — is inexpensive during construction and disruptive afterward. Soft space of that kind, deliberately placed, is how a plan absorbs a year of change without a project.

What does the DMV market change about the decision?

The Washington region has a tenant mix that shapes space decisions in ways a generic planning process misses.

Multi-jurisdiction search. A tenant searching the DMV is often comparing buildings in the District, Northern Virginia, and suburban Maryland simultaneously. Those are three different code and permitting environments: the District’s Department of Buildings, county-level permitting in Arlington, Fairfax, and elsewhere in Virginia, and county departments of permitting services in Montgomery and Prince George’s. The plan may be identical and the review path, timeline, and inspection sequence are not. A schedule built on one jurisdiction’s experience will be wrong in another.

Federal and contractor requirements. A tenant holding or pursuing federal work may carry space requirements that arrive from outside the program — secure areas, access control, separation requirements. Those belong in the program at the beginning, because they constrain which buildings are eligible at all, and discovering them after a lease is signed is expensive.

Associations and professional services. The region’s association and professional-services tenants tend to be meeting-heavy, which pushes programs toward conference capacity, boardrooms, and event space. Those spaces have ceiling height, acoustic, and exit requirements that not every floor plate satisfies.

Older building stock. Much of the region’s office inventory predates current workplace patterns. Deep floor plates, closely spaced columns, and limited window line can make a nominally large floor hard to plan well. This is precisely what a test fit surfaces and a rentable-square-foot comparison hides.

Transit and parking. Metro proximity and parking ratio are not space planning inputs in the technical sense, but they change effective attendance, which changes the program. A building where most of the staff can reach the office easily supports a different seat count than one where they cannot.

Who pays for the fit-out, and how does the allowance shape the plan?

Most office leases include a tenant improvement allowance — a landlord contribution toward building out the space, usually stated per rentable square foot. The allowance is a negotiated number, and the plan and the allowance have to be developed against each other rather than in sequence.

Three things tenants consistently learn late:

• The allowance rarely covers a full build of a demanding program. Enclosed offices, glass fronts, upgraded finishes, additional meeting rooms, specialty rooms, and mechanical modifications all move the number. A program that is priced against the allowance early can be adjusted while adjusting is free.
• What the allowance may be spent on is defined by the lease. Some allowances are limited to hard construction costs; others may be applied to design fees, cabling, furniture, or moving. Those terms are negotiable and materially change the tenant’s out-of-pocket.
• Cost overruns are the tenant’s. Which is the argument for pricing the plan before the lease rather than after: a program priced at LOI stage can be traded against rent, term, or allowance while all three are still open.

When the build itself begins, the plan becomes a set of construction documents and the project needs owner-side oversight — that is where project management and field-level construction management take over, and where the decisions made during planning either hold or get renegotiated under schedule pressure.

What does a space plan need to contain to be useful?

A plan that exists only as a drawing is hard to act on. A useful planning package carries the reasoning as well as the layout:

• The program, as a table: space types, quantities, target sizes, and the assumptions behind them.
• The test fit or block plan on the specific floor, with seat counts and room counts shown.
• An adjacency diagram explaining why teams sit where they sit — the part that gets lost when a plan is handed off and edited.
• Building requirements the plan depends on: ceiling heights, power and cooling loads, floor loading for any heavy equipment, any exit-path assumptions.
• A preliminary cost view tied to the allowance, identifying which scope is covered and which is not.
• A growth note recording what the plan assumes about headcount, over what period, and what the flex strategy is.

That last item is the one that pays off. A plan whose growth assumptions are written down can be checked against reality in year two. A plan whose assumptions live in a departed employee’s memory cannot, and the company re-derives them from scratch during the next search.

Frequently asked questions

What is the difference between space planning and interior design?

Space planning resolves how much space is needed, what kinds, and how they relate on a specific floor plate. Interior design resolves how it looks and feels — finishes, furniture, lighting character, materials. They overlap and are usually performed by the same team, but they answer different questions, and the planning question has to be settled first because it determines whether the space works at all.

When should a tenant start space planning before a move?

Before touring, not after. The program should exist early enough to shape which buildings are worth seeing, and the test fit should happen while multiple options are still live. Working backward from a desired occupancy date through construction, permitting, design, and negotiation generally puts the start considerably earlier than tenants expect — and in a multi-jurisdiction search, the permitting leg varies by jurisdiction.

What is a test fit, and does the tenant pay for it?

A test fit is a preliminary plan of your program drawn on a specific building’s floor plate. Who pays varies by market and deal: landlords frequently fund test fits for prospective tenants they are competing for, and brokerage agreements often address it. Ask at the outset rather than assuming, and clarify who owns the drawings afterward.

What is a good load factor for an office building?

There is no universally good number, because the load factor reflects how much shared area a building has and how it is measured. What matters is comparing buildings on usable square feet rather than rentable, and confirming that the lease names the measurement standard and edition used, so the figure can be verified rather than taken on faith.

How much square footage per employee should we plan for?

There is no single correct figure, and any number offered without knowing how your company works is a guess. The ratio of enclosed offices to open seats, meeting-room demand, and actual peak-day attendance move the answer more than headcount does. Programming by space type and then totaling produces a defensible number; dividing a headcount into a rule of thumb does not.

Can we plan the space after signing the lease?

You can, and many tenants do, but it removes leverage. Before signing, an unfavorable planning finding is a negotiating point against rent, term, or allowance. After signing, the same finding is a cost. The test fit in particular is worth completing while more than one building is still in play.

What happens if we outgrow the space mid-term?

The options are the ones the lease gave you: expansion rights or rights of first offer on adjacent space, sublease or assignment rights, a negotiated relocation within the landlord’s portfolio, or an early termination if one was negotiated. All of them are far easier to exercise if they were written into the lease at the start, which is why growth belongs in the planning conversation rather than in a later one.

Does space planning apply to industrial or retail space too?

Yes, though the drivers differ. Industrial planning is dominated by clear height, column spacing, dock configuration, power, and truck circulation rather than seat counts. Retail planning is driven by frontage, visibility, circulation, and back-of-house needs. The method is the same — program first, then test it against the specific building — even though the program’s contents are entirely different.