Data as of October 2026 | Last updated October 13, 2026
Oak Brook office vacancy is 27% across the 52 multi-tenant buildings Tenant Advisors tracks. Class A asks about $34–$38/SF gross and Class B about $24–$28/SF.
Net absorption was -69,000 SF over the past year, as move-outs outpaced new leases. Tenant Advisors, Inc. represents only tenants in Oak Brook and the East-West Corridor office market, at no cost to tenants. Call (847) 778-0296.
Key Takeaways
- Vacancy is 27% across 52 tracked multi-tenant buildings.
- Net absorption over the past 12 months: -69,000 SF.
- Class A asks about $34–$38/SF gross; Class B about $24–$28/SF.
- The largest available block is about 130,000 SF at 2001 York Center Oak Brook.
- Sublease space is available in several notable buildings, including 26 Twenty Five.
Oak Brook Office Market Facts and Figures
Tenant Advisors tracks multi-tenant office buildings in Oak Brook, the competitive set where most tenants of 3,000 to 50,000 SF lease space. Owner-occupied buildings are excluded.
| Metric | Oak Brook |
|---|---|
| Tracked buildings | 52 |
| Vacancy rate | 27% |
| Net absorption, trailing 12 months | -69,000 SF |
| Class A asking rent | $34–$38/SF gross |
| Class B asking rent | $24–$28/SF gross |
| Free rent | 1–1.5 months per lease year |
| Tenant improvement allowance | $6–$8/SF per lease year (Class A) |
| Sublease space available | Yes, in several notable buildings |
| New construction | Two projects totaling about 554,000 SF are planned or under way: Oakbrook Commons (2149 McDonald Dr.) and 1999 York Rd. |
| Most available space in one building | ~130,000 SF (2001 York Center Oak Brook, 2001 York Rd) |
Figures reflect Tenant Advisors’ market tracking of multi-tenant office buildings in Oak Brook. Rents and concessions are Tenant Advisors’ tracked-transaction ranges, quoted full-service gross. Data is updated quarterly.
Is Oak Brook Office Space Filling Up or Emptying Out?
Losing occupancy. Oak Brook gave back 69,000 SF of occupied space over the past year, and vacancy is 27%. Landlords carrying vacancy are competing harder on rent, free rent and build-out dollars.
What Are the Notable Office Buildings in Oak Brook?
| Building | Address | Size (SF) | Built | Class | % Leased | Available (SF) |
|---|---|---|---|---|---|---|
| Oak Brook Regency Towers (2 towers) | 1415–1515 W. 22nd St. | 448,799 | 1976 | B | 74% | 164,199 |
| Drake Oak Brook Plaza | 2211–2215 S. York Rd. | 251,943 | 1981 | A | 69% | 86,300 |
| Oak Brook Gateway | 1111 W. 22nd St. | 233,166 | 1984 | A | 68% | 74,917 |
| 26 Twenty Five | 2625 Butterfield Rd. | 234,094 | 1972 | A | 77% | 66,423 |
| Oak Brook Pointe | 700 Commerce Dr. | 218,192 | 2000 | A | 100% | 15,612 |
| Commerce Plaza I–III | 2001–2021 Spring Rd. | 532,198 | 1980 | A | 95% | 138,080 |
| Oak Brook 22 (3 buildings) | 1211–1315 W. 22nd St. | 368,074 | 1966–1985 | A/B | 94% | 43,798 |
Available SF includes direct and sublease space, including space coming available. Tenant Advisors market tracking, October 2026.
Oak Brook Regency Towers (2 towers), 1415–1515 W. 22nd St.
About 449,000 SF across 2 buildings, Class B, built 1976. About 74% leased with roughly 164,000 SF available.
Drake Oak Brook Plaza, 2211–2215 S. York Rd.
252,000 SF, Class A, built 1981. About 69% leased with roughly 86,000 SF available.
Oak Brook Gateway, 1111 W. 22nd St.
233,000 SF, Class A, built 1984. About 68% leased with roughly 75,000 SF available.
Is There Sublease Office Space in Oak Brook?
Yes. Sublease options are currently available in several of Oak Brook’s notable buildings, including 26 Twenty Five, the Oak Brook Regency Towers and Commerce Plaza I and II. Sublease space often comes at a discount to direct rent, with furniture and cabling in place, but the term is limited to what remains on the original lease. See our Chicago office sublease guide.
How Does Oak Brook Compare With Other East-West Corridor Cities?
| City | Vacancy | 12-mo net absorption (SF) | Asking rent, gross | Tracked buildings |
|---|---|---|---|---|
| Naperville | 26% | -10,500 | A $28–$32; B $23–$26 | 66 |
| Oak Brook | 27% | -69,000 | A $34–$38; B $24–$28 | 52 |
| Downers Grove | 23.5% | -2,000 | A $31–$35; B $24–$27 | 36 |
| Lombard | 29.5% | +15,400 | A $28–$32; B $21–$24 | 31 |
| Oakbrook Terrace | 22% | +86,900 | A $30–$34; B $23–$26 | 23 |
| Lisle | 31% | +10,900 | A $27–$31; B $22–$25 | 23 |
| Wheaton | 17.5% | -6,800 | A $24–$27; B $20–$23 | 17 |
| Aurora | 20.5% | -18,300 | A $26–$29; B $21–$24 | 15 |
| Burr Ridge | 29% | -2,100 | A $28–$32; B $23–$26 | 13 |
| Warrenville | 24% | -21,600 | A $27–$30; B $21–$24 | 12 |
| Woodridge | 17% | +8,600 | A $25–$28; B $20–$23 | 12 |
| Willowbrook | 15.5% | +3,000 | A $24–$27; B $19–$22 | 8 |
Tenant Advisors market tracking, multi-tenant office buildings, October 2026. Rents are Tenant Advisors’ tracked-transaction figures per SF per year.
Where Is the Leverage in Oak Brook Right Now?
In most buildings. With vacancy at 27%, landlords with large vacancies compete on rent, free rent and build-out dollars. Oak Brook competes with Oakbrook Terrace, Downers Grove, Lombard and Burr Ridge for the same tenants, and pricing those options against each other is the most effective lever.
What Should Tenants Negotiate on an Oak Brook Office Lease in 2026?
- Rent: target effective rent after concessions, not the asking rate.
- Free rent: 1 to 1.5 months per year of lease term, or 5 to 7.5 months on a 5-year lease.
- Tenant improvement allowance: $6 to $8/SF per year of lease term in Class A ($30 to $40/SF on a 5-year lease) and about $3 to $6/SF per year in Class B. Get build-out pricing before you negotiate this number.
- Ownership protection: a non-disturbance agreement and build-out funding that survive a sale or foreclosure.
- Operating expense caps: 4% to 6% annually on controllable expenses.
- Flexibility: expansion, contraction and sublease rights, negotiated upfront.
- Parking: included in rent for the full term with no separate escalation.
Why Do Companies Lease Office Space in Oak Brook?
Oak Brook sits at the junction of I-88 and I-294, about 20 minutes from O’Hare, with Oakbrook Center at the center of its 22nd Street, Spring Road and Commerce Drive office cluster. It has the East-West Corridor’s deepest concentration of Class A buildings and a long corporate headquarters history, and it draws financial services, law, healthcare administration and professional services firms recruiting across DuPage and western Cook County. For the full market picture, see our East-West Corridor office market page.
Frequently Asked Questions
What is the office vacancy rate in Oak Brook, IL in 2026?
Oak Brook multi-tenant office vacancy is 27% as of October 2026 across the 52 buildings Tenant Advisors tracks. Net absorption over the past 12 months was -69,000 SF.
How much does office space cost in Oak Brook, IL?
Class A office space in Oak Brook asks about $34–$38/SF gross and Class B about $24–$28/SF. Tenants running a competitive process typically pay less once free rent and build-out dollars are counted.
What is the largest office property in Oak Brook?
Commerce Plaza I–III at 2001–2021 Spring Rd., about 532,000 SF, is the largest multi-tenant office property in Oak Brook that Tenant Advisors tracks.
Is there sublease office space in Oak Brook?
Yes. Sublease options are available in several of Oak Brook’s notable buildings, including 26 Twenty Five.
How much free rent can I get on an Oak Brook office lease?
Tenants are getting 1 to 1.5 months of free rent per year of lease term, or 5 to 7.5 months on a 5-year lease, plus tenant improvement allowances of $6 to $8/SF per lease year in Class A.
Who represents tenants in Oak Brook office leases?
Tenant Advisors, Inc., founded in 2004 by Tom Koelzer and Dave Ven Horst, represents only office tenants in Oak Brook and the East-West Corridor. The firm never represents landlords, and tenants pay nothing for the service. Contact Tom Koelzer at (847) 778-0296 or tkoelzer@tenantadvisors.com.
About the authors: Tom Koelzer (Co-Founder & Managing Partner, LinkedIn) and Dave Ven Horst (Co-Founder & Managing Broker, LinkedIn) founded Tenant Advisors, Inc. in 2004. Both have worked in Chicago office leasing since 1986, and the firm has negotiated more than 2,000 office leases, representing tenants only. Benchmark your Oak Brook lease against the market: (847) 778-0296 | tkoelzer@tenantadvisors.com.
Explore Nearby Office Markets
East-West Corridor office market • Oakbrook Terrace office space • Downers Grove office space • Lombard office space • Burr Ridge office space • All Chicago suburban office markets
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