Office Space Shortage Hits Trophy Towers as Vacancy Stays Near 20%

Two office markets share one statistic

The U.S. office market is easy to misread in late 2026. By the national numbers, roughly one in five square feet is still empty. For the largest tenants looking for modern space in the best locations, though, the market is tight and getting tighter.

The brokerage reports for the third quarter agree on the direction even though their figures differ. CBRE has national vacancy at 18.2%, its fifth straight quarterly decline, with net absorption positive for the tenth quarter in a row2. Cushman & Wakefield's measure is higher, at 19.8%, down 30 basis points from a year earlier, with absorption positive for five straight quarters1. Yardi Matrix put vacancy at 17.7% in June7. Each firm defines the market a little differently, so the levels vary. All of them show vacancy turning lower.

The more telling numbers sit below the headline rate. CBRE's prime vacancy fell 250 basis points in a year to 11.9%, and prime vacancy in Midtown Manhattan dropped to 1.9%2. Savills counted large contiguous blocks across 16 North American markets. About 12.2% of office buildings can offer 50,000 square feet in one piece. That falls to 7.0% for Class A buildings, 3.3% for Class A in each market's three strongest submarkets, and 0.6% for trophy properties21. Savills' conclusion is that big tenants no longer struggle to find available space. They struggle to find suitable space21.

Supply has fallen off a cliff

The main cause of the shortage is that almost nothing new is being built. Cushman & Wakefield says deliveries through the first three quarters of 2026 came to 7.1 million square feet, the lowest nine-month total in more than 30 years1. The firm says its 23 million square foot pipeline is up 20% from its first-quarter low, but before 2025 the pipeline had not been that small since 19971. JLL reports the same 23 million square feet under construction25. CBRE says the pipeline is 84% below its 2020 peak2.

At the same time, existing space is being taken off the market. JLL says 9.6 million square feet left the inventory in the third quarter through conversions and redevelopment, and national inventory has shrunk by more than 45 million square feet since late 202325. In Manhattan, Savills reports the office stock fell by 7.4 million square feet in a single year21. Atlanta now has no office projects under construction for the first time in 15 years21.

JLL calls this a "flight to scarcity." CNBC, citing JLL, reports that effective rents for first-generation trophy space are up more than 20% from a year earlier, and that tenants priced out of trophy space have pushed second-generation rents up about 10%24. CBRE's national asking rent rose 3.1% to $37.95 per square foot, the fastest increase since 20162.

Manhattan is where it shows most

Manhattan is the clearest example. JLL puts the borough's trophy vacancy at a cycle low of 4.9%. Average trophy asking rents are $137.09 per square foot, and 23 leases this year have topped $250 per foot30. Total vacancy fell to 12.6% from 14.7% a year earlier, the lowest level since before 202029. JLL says the next wave of new buildings is not expected until after 203130. Tenants are already looking along Lexington and Third avenues rather than waiting for Park Avenue space to open up29.

The office REITs show the same thing. SL Green signed 591,108 square feet of Manhattan office leases in the third quarter. Replacement leases started 13.6% above the prior fully escalated rents on the same space31. The company says occupancy reached 95%, up from 92.9% at the end of 202536. Management described a pipeline of 1.3 million square feet with expected rent increases above 20%37. CEO Marc Holliday said pricing power is growing for the limited supply of high-quality Manhattan buildings37. The stock rose more than 5% after the report33.

The results are not quite as strong as the headlines suggest, and some coverage points this out. FFO of $1.59 per share was essentially flat from a year earlier. Much of the earnings gain and the higher guidance came from asset sales, including a stake in the company's hospitality business, rather than ongoing operations4036. Management also said higher interest rates took about $0.25 per share off second-half guidance37. The leasing gains are real, but financing costs are eating into them.

The debt problem has not gone away

The credit picture is where the coverage differs most, and it is the main reason the scarcity story should not be overstated. Commercial real estate loans backed by office buildings remain under heavy stress. CRED iQ reported that the office CMBS delinquency rate hit 13.2% in August 2026, the highest since at least 2019. Its special servicing rate reached 15.7%19. The firm says 71% of distressed office balances stem from failed or upcoming refinancings rather than missed payments19. Even full buildings are not safe: a $209 million loan on a fully leased Sunnyvale property with Apple as its largest tenant received a notice of default in September19.

Other data looks better. The Mortgage Bankers Association reported that delinquency rates fell across most property types and lenders in the second quarter, although office and lodging remain the weakest17. These views can both be right. The MBA survey covers banks, life insurers and agency lenders as well as CMBS. CMBS conduit loans tend to finance older, weaker buildings, and they are where the distress is concentrated1920. The split in leasing between the best buildings and the rest shows up in lending too.

That makes the recovery uneven. Tenants moving up to trophy space leave older buildings behind, and those older buildings back much of the debt now coming due. CRED iQ counts roughly $39 billion of office CMBS maturing over the next 12 months, with $13.9 billion already showing warning signs19. Rates are adding pressure. The Federal Reserve raised its benchmark in September, its first increase since 202347. The 10-year Treasury yield closed at 5.31% on October 555.

Data centers and apartments take the leftovers

The weakest office buildings are increasingly being put to other uses. The most notable example in 2026 is conversion to data centers. In Chicago, the former Cboe headquarters at 400 S. LaSalle is becoming a 33-megawatt data center at a cost of $300 million to $400 million. Its developer expects rents up to four times the downtown office average41. The building's deep wiring, high ceilings and column-free floors made it a good fit. A JLL managing director cautioned that most office buildings do not have those features, and that roughly 95% of municipal buildings a city asked about would not work41.

Data center construction is also changing the economic data. Census Bureau spending figures count data centers as "office." That is why office construction spending rose 16.9% year over year even as actual office building stalled47. ConstructConnect counted $84.1 billion in data center starts through July, already more than 2025's full-year record47. JLL says suppliers clustering near hyperscale campuses are also pushing up warehouse demand and rents43. Anyone reading a headline about an office construction boom should keep this in mind.

Apartment conversion is the older and larger route. The office-to-residential pipeline reached 90,300 units at the start of 2026, up 28% from a year earlier42. SL Green itself plans 750 units at 750 Third Avenue36. The economics often fall apart, however. In Atlanta, rising construction costs, flat apartment rents and the expectation of more rate hikes have derailed or reshaped several downtown conversion plans44.

Whether apartment rents are rising depends on which index you use. Zillow-based data analyzed by Chandan Economics shows rents up 2.4% year over year in September53. Yardi Matrix shows 0.7%58. Apartment List still shows rents down 0.4%, though its vacancy rate is falling51. The direction is consistent across sources: the overbuilding is clearing, and San Francisco leads the gains while much of the Sun Belt lags5355. For conversion developers, rent growth this modest leaves little room for error in high-cost projects.

What it means

The office market's recovery is real but narrow. Rising rents and falling vacancy reflect a lack of quality supply more than a broad return of demand. Some analysts point out that much of the leasing comes from tenants moving between buildings rather than from hiring, which limits how far the recovery can go23. Owners of trophy buildings and the REITs that hold them have pricing power and can refinance. Owners of commodity buildings face expensive tenant concessions, lenders who will no longer extend loans, and a slow path to conversion or demolition.

This article's reading is that the scarcity will last for years at the top of the market and will spread gradually to good buildings one tier down, as Savills and JLL both expect2129. It will not save the rest of the stock. In 2027 the national vacancy rate will matter less than the share of large, high-quality blocks still available and the volume of office loans reaching maturity. Both point to a market that is short of good buildings and still has too many outdated ones.