MARKET AREA
East-West Corridor Office Market
Updated October 2026 · Tenant Advisors market tracking, Q3 2026
East-West Corridor office vacancy is about 15% as of Q3 2026, the tightest of the five Chicago-area markets we cover. Class A space leases for about $39 per SF gross and Class B for about $26. Tenants typically negotiate 1 to 2 months of free rent per year of term. The most room is in large Class A blocks in Oak Brook and Downers Grove.
The East-West Corridor — running along I-88 through Oak Brook, Naperville, Lisle, and Downers Grove — is Chicagoland’s largest suburban office market and home to many corporate headquarters and regional offices. Conditions vary sharply by building: well-capitalized Class A properties hold firmer on rate, while others compete hard on concessions, which makes building-level intelligence essential before you negotiate. Tenant Advisors has represented office tenants in the corridor since 2004, exclusively on the tenant side, helping companies in the 3,000–50,000 SF range renew, relocate, and restructure on terms the market actually supports.
15%
Vacancy Rate
$26–$39
Asking Rent / SF
1–2 Mo
Free Rent per Lease Year
Moderate
Tenant Leverage
Downers Grove
Highland Landmark IV
Downers Grove
The 263,000 SF, eight-story tower at 3050 Highland Pky is the marquee availability play on the corridor — just 55% leased, with the entire 118,132 SF building block open and contiguous, from a 10,590 SF suite to a full 118,000 SF user. It posted the single largest 12-month net absorption in the East-West 4 & 5 Star tier (+141,000 SF).
Asking rents are $21.00/SF NNN. The Energy Star asset sits in the Highland Landmark campus off I-88 and Highland Ave with a fitness center, food service, banking, and 4.37/1,000 parking. With more than 100,000 SF open under a single ownership (Barrington Venture), a tenant can name its terms on free rent and TI.
Premier Class A Tower at I-88 / Route 83
Oakbrook Terrace
The premier Class A address at the I-88 / Route 83 interchange, this 207,000 SF, 10-story tower at 1 Mid America Plz was renovated in 2019 and is 89% leased — home to Crowe LLP, TricorBraun, and International Contractors. Its amenity package is the deepest in the cluster: roof terrace, fitness center, concierge, restaurant, car charging, and an A energy rating.
Asking rents run $25.50–$26.00/SF net, with suites from small spec offices up to an 8,992 SF contiguous block and a 5,329 SF sublet. The asset traded in December 2025 as part of a portfolio sale, so the new ownership is motivated to fill the remaining 24,000 SF of vacancy.
Oakbrook Terrace
Oak Brook
Established Oak Brook Value Play at Commerce Plaza
Oak Brook
Part of the four-building Commerce Plaza campus at I-88 and Route 83, this 174,000 SF, seven-story tower at 2001 Spring Rd is the established Oak Brook value play — 91% leased and home to Inspira Financial, Portillo’s, USI, and ASC Engineered Solutions. Zeller ownership keeps the campus amenity-rich: fitness center, food service, conference facility, banking, and a convenience store.
Asking rents run a wide $16.00–$23.50/SF, with a 25,522 SF full-floor block coming available in 2027 plus a discounted 24,384 SF full-service sublet at $16.00/SF. For a tenant that wants an Oak Brook address with real amenities and room to negotiate on a sublet, this is the spot.
Market Conditions
The East-West Corridor runs along I-88 from Oak Brook and Oakbrook Terrace on the east through Downers Grove and Lisle to Naperville and Warrenville on the west — one of suburban Chicago’s largest office markets at roughly 75 million SF. It is tied together by I-88, I-294, and I-355, with Metra BNSF and Union Pacific West commuter service, and tenancy skews toward professional services, corporate operations, healthcare, and technology firms in campus-style buildings.
Overall vacancy stands at about 15% and has held in the mid-teens, with effectively no new speculative construction underway across the corridor. Landlords — particularly owners of large Class A blocks on the eastern Oak Brook / Downers Grove end — are competing hard for occupancy with free rent, above-market TI allowances, and flexible terms.
WHAT THIS MEANS FOR YOU
Leverage here is building by building. The corridor is the tightest of the five Chicago-area markets we cover, but large Class A blocks in Oak Brook and Downers Grove still compete hard on free rent and build-out dollars. The advantage goes to tenants who start early and run a competitive process across multiple buildings.
Cities We Cover
Oak Brook, Oakbrook Terrace, Downers Grove, Lisle, Naperville, Warrenville, Hinsdale, Westmont, and the entire I-88 East-West Corridor (we cover the entire Chicago market).
SUBMARKETS WE COVER
East-West Corridor Office Market
Frequently Asked Questions About East-West Corridor Office Space
What is the office vacancy rate in the East-West Corridor?
Overall vacancy along the I-88 East-West Corridor is about 15%, holding in the mid-teens, with effectively no new speculative office construction underway.
How much does office space cost in Oak Brook and the East-West Corridor?
In the transactions we track and negotiate, Class A office space in Oak Brook and the East-West Corridor runs about $39 per SF full-service gross and Class B about $26. Naperville, Lisle, and Downers Grove generally price below Oak Brook.
How much free rent can East-West Corridor office tenants get?
Tenants typically negotiate 1 to 2 months of free rent per year of lease term, or 5 to 10 months on a 5-year lease, plus tenant improvement allowances. Landlords with large Class A blocks on the Oak Brook and Downers Grove end compete hardest.
Which cities are in the East-West Corridor office market?
Oak Brook, Oakbrook Terrace, Downers Grove, Lisle, Naperville, Warrenville, Hinsdale, and Westmont, along I-88 between I-294 and the Fox River.
Who represents office tenants in the East-West Corridor?
Tenant Advisors, Inc., founded in 2004 by Tom Koelzer and Dave Ven Horst, represents only office tenants along the I-88 corridor and across Chicago. The firm never represents landlords, and tenants pay nothing for the service. Call (847) 778-0296.
Discuss Your Office Requirement in the East-West Corridor
Tell us your size, timing, and where your people live. A co-founder or an Executive Vice President will call within one business day with the buildings that fit and what landlords are conceding now.
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