Should You Divide That Floor? A Manhattan Class B Owner's Test for Splitting Office Space Into Small Suites

A Manhattan owner showed me a floor last winter that he had been trying to lease for eleven months. It was 9,200 square feet of Class B office on the ninth floor of a 1920s building in Midtown South, with good light, a decent lobby and an asking rent that was reasonable for the block. In eleven months he had four tours and no proposals. His broker told him the market was slow. When I looked at the floor, the market was not the problem. The problem was that the space was sized for a tenant who barely exists in that building anymore.

The tenants who actually walk into a Class B building in Manhattan today are small. They are professional practices, design studios, small funds, nonprofits and growing service firms that need 1,500 to 3,500 square feet, a door they control and a monthly cost they can plan around. A 9,200-square-foot plate asks one of them to take three times the space it needs. Dividing it can fix that, but dividing a floor is a capital decision with real downside, and I want owners to make it with numbers rather than instinct.

This article is for owners of Class B office buildings in Midtown South, Murray Hill, the Flatiron area and Lower Manhattan who are carrying a large floor that will not lease whole. I write it from the landlord's side. What small tenants want matters here only because you must price for it.

Decide whether the floor is actually a division candidate

Not every floor should be split. I start with four physical questions before any pricing. Does the floor have at least two usable entrances from the elevator lobby, or can a corridor be added without losing the best space? Does each future suite get its own windows, since an interior suite with no light leases at a deep discount? Can the bathrooms, the HVAC zones and the sprinkler layout serve the new plan without a major rebuild? And does the floor plate allow suites near 1,500 to 3,000 square feet without leaving awkward leftover rooms?

If the answer to most of these is yes, the floor is a candidate. If the answer is no, the better move may be to lease it whole at a sharper price, or to look at a different fix altogether. I have told owners to leave a floor alone more than once, and those conversations are some of the cheapest ones I have.

Build the demand case before the demolition budget

Owners often start with the cost to build and work backward. I start with demand. For each likely suite size, I look at what comparable small suites in the immediate submarket are actually renting for, how many are available, and how long they sit. In Midtown South, a well-built 2,000-square-foot suite with its own entry can rent for a meaningful premium per foot over the same space inside a 9,000-foot plate, because the small tenant is paying for control and certainty, not just square footage.

I express that premium as a percentage over the whole-floor rent I would otherwise expect, and I stress it. If the premium is 15 to 25 percent, the economics usually work. If it falls near 5 percent, the capital rarely pays back. The point of the exercise is to find the premium at which the plan breaks even, then ask whether the market will plausibly clear above it.

A divided floor does not need to rent for more per foot than a whole one. It needs to rent for enough more to repay the cost of dividing it, and to do so sooner than the vacancy would have cost.

Price the capital honestly

The buildout is where division plans go wrong, because owners price demolition and drywall and forget everything around them. A real budget has to carry architectural and engineering fees, filings and approvals, new demising walls with proper fire ratings, separate suite entry doors, additional or relocated sprinkler heads, HVAC rebalancing, electrical subpanels or meters, restroom access for each suite, and signage and wayfinding in the corridor. It also has to carry a contingency, because older buildings hide conditions behind walls.

I ask owners to carry the total as a cost per rentable square foot and also as a number of months of the new rent that it consumes. A division that costs the equivalent of fourteen months of the incremental rent is a different proposition from one that costs four years. I also add carry for the months the floor is under construction and the leasing period afterward. Owners who skip that line are the ones surprised when a project that looked like a 20-month payback takes three years.

Test three layouts, not one

An architect will usually draw the layout that looks cleanest. I prefer to cost three: two large suites, four smaller suites, and a hybrid with one anchor suite and two or three small ones. Each layout carries a different mix of demising cost, corridor space lost to circulation, and leasing speed.

Fewer, larger suites cost less to build and lease to firms that stay longer, but they are exposed to the same weak demand that sank the whole floor. More, smaller suites rent faster and at higher rates per foot, but they need more corridor, more doors and more management attention, and they churn more. The hybrid is often the answer, because the anchor suite protects the income stream while the small suites lift the average rent. I rank the layouts by cost, by expected months to lease and by stabilized income, and the owner chooses on the trade between speed and total return rather than on the drawing.

Lease structure for small suites

Once the plan is set, the lease terms matter as much as the walls. Small tenants want shorter terms, typically two to five years, and they push for flexibility. A landlord who agrees to every request ends up with churn and re-leasing costs that erase the premium. I usually recommend a three-to-five-year base term, a modest security deposit sized to the tenant's financials, and a defined structure for expense recoveries so that the building's tax and operating cost increases are shared proportionally across suites.

I also set the concession package before the first tour. A small amount of free rent on a longer term, with a capped contribution to a basic improvement, is easier to defend than a different deal for every tenant. Consistency also protects the owner from small tenants comparing notes in the corridor.

A Midtown South case study

Return to the ninth floor. The 9,200 square feet had been asking a single whole-floor rent and drawing tours but no proposals. I costed the three layouts and recommended the hybrid: one 3,400-square-foot anchor suite on the street side, where the light was best, and three suites of roughly 1,600 to 1,900 square feet on the other side, each with its own corridor entry.

The work cost the owner the equivalent of about fifteen months of the new rent. Within seven months of completing the plan, the anchor suite and two of the smaller suites were leased, and the fourth was in negotiation. Projected annual income on that floor came out about 35 percent above what the owner would have received from a whole-floor tenant at his original asking rent, and it began arriving months earlier than a lease that had not materialized in nearly a year.

A second building shows the other side. A Lower Manhattan owner had a 7,500-square-foot floor with a deep core and windows on only one wall. Any layout I drew left three of four suites without natural light, and the demand case collapsed once I priced those interior suites realistically. I advised him to lease the floor whole at a sharper rent and a longer term, and he kept his capital. The analysis paid for itself by stopping a project, which is a perfectly good outcome. Owners sometimes read a "no" as a failed engagement, but avoiding a six-figure mistake is worth as much as finding income, and it costs nothing to hold.

Know when to stop

Dividing a floor is not an automatic improvement. I advise against it when the building has a weak elevator and lobby experience that would sink small tenants regardless of the space, when the plate does not give natural light to most suites, when the capital would consume more than about two years of incremental rent, or when the owner expects to sell within a year and cannot recover the spend in price. A buyer will pay for stabilized income, but a half-finished division reads as risk.

The right sequence is short. Check the physical fit, build the demand case, cost three layouts, set the lease structure and the concession policy, and then decide. Owners who do it in that order tend to make a clear yes or a clear no.

I have seen this decision come up often in Manhattan and in the other boroughs. Across more than 100 landlord engagements over 13+ years of daily NYC real estate work, a well-chosen division is one of the more reliable ways to turn a stubborn vacant floor into income, and a badly chosen one is one of the more expensive ways to lose a year.

If you are carrying a floor that will not lease whole, I can review the plate, cost the layouts and tell you whether dividing it pays, as a fixed-fee consulting engagement with no commission and no long-term contract.

For the pricing side of the same problem, see Class B/C Office in Brooklyn and Queens: Why Vacancy Is Usually a Pricing and Positioning Problem. For how to set concessions, see Pricing a Manhattan Loft Floor: Face Rent, Free Rent and TI for Owners in SoHo, NoHo, Flatiron and the Garment District.