Suburban Chicago office vacancy finally stopped setting records, and almost none of the credit belongs to tenants.
According to Crain’s Chicago Business, suburban office vacancy closed the third quarter at 33.1%, unchanged from midyear, ending a run of 21 straight quarters in which the rate hit a new all-time high. That follows a second-quarter dip from 33.4% reported by The Real Deal, the first quarterly decline since before the pandemic. On the surface, that reads like a bottom. Look one line deeper and the story changes: suburban tenants gave back roughly 115,000 square feet of occupied space in the third quarter and about 203,000 square feet year to date. Move-outs are still beating move-ins. The vacancy rate held because the denominator shrank.
Total suburban office inventory has fallen from about 100 million square feet in early 2020 to just under 93 million, the smallest base since the 1990s. That is the real headline. Chicagoland is not filling its empty suburban office buildings. It is erasing them.
The Math Behind The Plateau
1. Supply Is Shrinking Faster Than Demand
Run a back-of-the-envelope test. A 33.1% vacancy rate on a 93 million square foot market works out to roughly 30.8 million square feet of empty space. If the 7 million square feet pulled from inventory since 2020 were still standing and still empty, suburban vacancy would sit closer to 38% today. Not every removed building was fully vacant, so the true counterfactual is lower, but the direction is unmistakable: demolition and conversion, not leasing, stopped the bleeding.
2. The Removals Are Concentrated In Obsolete Stock
The third quarter’s removals read like a map of where suburban office no longer pencils:
- In Addison, Logistics Property razed the Meadows Office Center to make way for a 140,000 square foot industrial building.
- In Bannockburn, the owner of the Bannockburn Lakes complex converted one of its office buildings into storage.
- In Rolling Meadows, Digital Realty Trust bought the vacant 485,000 square foot Atrium Corporate Center along the I-90 corridor.
- In Downers Grove, Sentinel Technologies is leaving a building that is being sold for warehouse redevelopment, moving one mile west to a full building in Lisle.
Each of these sites shares the same traits: a large parcel, interstate access, and a building whose highest and best use is no longer office. We have walked through which buildings actually work for reuse in Finding The Right Building For Office-To-Residential Conversion and why floor plate and scale matter in Why Size Matters in Office to Residential Conversions?. In the suburbs, that same logic increasingly points toward industrial and data center buyers, which is why our State of the Chicago Industrial Market 2026 Q3 report matters to office owners as much as warehouse investors.
3. Class A Is Winning, Class B Is Paying For It
Flight to quality has not slowed. Class A space posted about 41,000 square feet of positive absorption in the third quarter while Class B lost roughly 118,000. Tenants keep consolidating into fewer, better buildings, a pattern we explored in Are Office Employees The New Consumers?. For a Class B owner, a flat market-wide vacancy rate is cold comfort when your own segment is still shedding occupancy every quarter.
The Deerfield Sublease That Tests The Top Of The Market
The most consequential listing of the quarter sits in Lake County. Fortune Brands Innovations has put more than 175,000 square feet up for sublease in one of the two buildings it leases at the Amgen campus in Deerfield. The roughly 20-year-old space, leased through mid-2040, is now the largest available sublease block in the suburbs.
That matters to every North Shore landlord from Lincolnshire to Northbrook. A large, high-quality sublease block with a long remaining term can be priced below direct asking rents, and it competes for exactly the tenants Class A owners are counting on. There is precedent for big blocks moving fast: Zurich’s 360,000 square feet of sublease space at its Schaumburg headquarters was fully absorbed in just over a year by Wheels and ADP. But one 175,000 square foot offering can also reset concession expectations across a submarket. If you are negotiating a renewal in Lake County right now, our breakdown of rent abatement versus tenant improvement dollars is worth reading before you sign.
What This Means For Chicagoland Owners, Tenants, And Investors
The flatline is not a recovery. It is a sorting. Buildings are being divided into those that will compete for office tenants and those that will become something else, and the sooner an owner knows which group their asset belongs to, the more options they keep.
- Underwrite on absorption, not vacancy. A stable vacancy rate driven by demolitions says nothing about whether tenants will fill your building. Track move-ins and move-outs by submarket and building class.
- Price your Class B asset against its alternative use. An interstate-adjacent parcel in DuPage, the O’Hare corridor, or Lake County may be worth more to an industrial or data center buyer than the building is worth to an office buyer. Our conversation with Ron Rohde on why smart investors are buying dirt shows how much capital chases well-located land.
- Tenants, use the sublease overhang. Large sublease blocks give occupiers leverage on rent, term, and build-out. Benchmark every direct proposal against sublease alternatives before committing.
- Class A owners, compete on experience. Fewer buildings and choosier tenants mean amenities, management quality, and lease flexibility decide deals, not just lobby finishes.
- Watch the village board. Every removal requires a municipality willing to rezone an office park. Suburbs that move quickly on industrial and data center entitlements will clear obsolete stock first, and the office buildings left standing nearby will benefit.
What Comes Next
Expect more of the same through 2027: more obsolete buildings removed, more demand pooled into top-tier product, and a vacancy rate that drifts sideways or slightly lower even while absorption stays negative. The true inflection point arrives when absorption turns positive on its own, without help from the wrecking ball. Until then, the winners will be owners who recognize early which side of the line their building sits on. For the full quarterly picture, see our State of the Chicago Office Market 2026 Q3 report and RFP 110 on the State of the Chicagoland Commercial Real Estate Market, or browse current availabilities through our commercial real estate space search.
Whether you are deciding to reposition, sell, or lease suburban office space anywhere in Chicagoland or Southern Wisconsin, contact Van Vlissingen and Co. at 📞 847-634-2300 or 🌐 vvco.com to map out your next move.