HVAC Government Contracts in Illinois
Statewide ranked opportunities and likely upcoming recompetes for facilities contractors across Illinois.
Market Intelligence —
HVAC in Illinois
Illinois's HVAC Services market is highly concentrated: Unknown alone accounts for 46% of the state's 50 active opportunities in Q2 2026, with Unknown, Batavia, Marion collectively representing 74% of all activity. This concentration pattern creates a two-tier market — contractors must establish presence in Unknown to access the majority of deal flow, while the remaining 6 cities offer lower-volume but less competitive opportunities.
In Illinois's HVAC Services sector, Unknown dominates with 23 active opportunities (46% of state volume) in Q2 2026, followed by Batavia at 8 and Marion at 6. The 2.9× gap between first and second place signals that Unknown has structural advantages — likely driven by proximity to major federal facilities or defense installations. Contractors should track how these rankings evolve seasonally, as federal fiscal year-end (September) often reshuffles city-level activity.
Illinois's HVAC Services procurement is controlled by a narrow agency base: Department of Veterans Affairs and Department of the Navy together account for 78% of all awards worth $194.2M in total obligated spending. This dual-agency dominance means contractors in Illinois must build relationships with both to access the majority of contract dollars. On the vendor side, the market is incumbent-heavy: the top 3 contractors — ONEILL CONTRACTORS INC, DIVERSE SOLUTIONS GROUP INC., SOUTH TOWN REFRIGERATION, LLC — hold 80% of recent awards, meaning new entrants face significant barriers unless targeting recompetes or set-asides.
Illinois's HVAC Services recompete pipeline contains 3 contracts approaching renewal windows in Q2 2026, valued at an estimated $81.8M combined. 3 of these (100%) carry high takeover signals, indicating agencies with a pattern of switching vendors at contract renewal. Department of the Army accounts for the largest share of upcoming recompetes, making it the priority agency for displacement-focused contractors.
Analysis computed from SAM.gov and USAspending.gov data · Updated daily
Illinois has 50 open hvac contract opportunities as of 2026-05-30, with 3 likely recompetes identified. Top markets include Unknown, Batavia, Marion.
50
Open Opportunities
3
Likely Recompetes
Department of Veterans Affairs
Top Agency
Unknown
Top City
Key Insights —
HVAC in Illinois
Steady activity: 8 new hvac in illinois opportunities posted in the last 30 days, representing $1.9M in estimated pipeline.
Majority small-business: 92% of active opportunities carry a small-business set-aside designation.
3 incumbent-held contracts are approaching likely recompete windows, worth an estimated $81.8M.
Highly concentrated market: the top 3 incumbent vendors hold 80% of recent awards across 5 tracked contractors.
Computed from SAM.gov and USAspending.gov data · Updated daily
Top Opportunities This Week
| Score↕ | Title↕ | Location↕ | Agency↕ | Due Date↕ | Set-Aside↕ |
|---|---|---|---|---|---|
| 64 | Request for Proposals - Central Utility Building Purge Unit Replacement for Chiller No. 5 Fermi National Accelerator Laboratory, Batavia, Illinois | Batavia | ENERGY, DEPARTMENT OF.ENERGY, DEPARTMENT OF.FERMILAB - DOE CONTRACTOR | Jun 12, 2026 | NONE |
| 63 | 183 CES Repair Server HVAC and Electric | — | DEPT OF DEFENSE.DEPT OF THE ARMY.NGB.W7M6 USPFO ACTIVITY ILANG 183 | — | SBA |
| 63 | Z--Building 81H Fire Alarm Mass Notification System | — | DEPT OF DEFENSE | — | 8A |
| 62 | Z2DA--657A5-25-101, Replace Chiller #1 | — | VETERANS AFFAIRS, DEPARTMENT OF.VETERANS AFFAIRS, DEPARTMENT OF.255-NETWORK CONTRACT OFFICE 15 (36C255) | — | — |
| 61 | MAGIS-100 Infrastructure Modifications | Batavia | ENERGY, DEPARTMENT OF.ENERGY, DEPARTMENT OF.FERMILAB - DOE CONTRACTOR | May 21, 2026 | SBA |
| 61 | FCI Marion - Replace Summer Boiler #2 | Marion | JUSTICE, DEPARTMENT OF | May 8, 2026 | SBA |
| 61 | MAGIS-100 Infrastructure Modifications | Batavia | ENERGY, DEPARTMENT OF.ENERGY, DEPARTMENT OF.FERMILAB - DOE CONTRACTOR | May 14, 2026 | SBA |
| 61 | FCI Marion - Replace Summer Boiler #2 | Marion | JUSTICE, DEPARTMENT OF.FEDERAL PRISON SYSTEM / BUREAU OF PRISONS.FAO | May 8, 2026 | SBA |
| 61 | HEERC Duct Replacement for DHU | Batavia | ENERGY, DEPARTMENT OF | May 12, 2026 | SBA |
| 61 | HEERC Duct Replacement for DHU | Batavia | ENERGY, DEPARTMENT OF.ENERGY, DEPARTMENT OF.FERMILAB - DOE CONTRACTOR | May 19, 2026 | SBA |
Showing 10 of 30 results
Recompetes
| Score↕ | Location↕ | Agency↕ | Incumbent↕ | Est. Window↕ | Takeover Signal↕ |
|---|---|---|---|---|---|
| 88 | — | Department of Veterans Affairs | CITADEL FEDERAL SOLUTIONS LLC | Dec 31, 2025 – Apr 30, 2026 | high |
| 88 | — | Department of the Army | SIX MILE, LLC | Jan 30, 2026 – May 30, 2026 | high |
| 88 | — | Department of the Army | TUNISTA LOGISTICS SOLUTIONS, LLC | Jan 13, 2026 – May 13, 2026 | high |
Across Illinois, hvac opportunities span federal agencies with facilities in major metropolitan areas. There are currently 50 active opportunities. Top cities include Unknown, Batavia, Marion.
Data updated:
Top Buying Agencies
| Agency↕ | Awards↕ | Est. Spend↕ |
|---|---|---|
| Department of Veterans Affairs | 57 | $75.3M |
| Department of the Navy | 49 | $58.3M |
| Department of the Army | 21 | $51.9M |
| Public Buildings Service | 5 | $6.1M |
| Federal Aviation Administration | 4 | $2.6M |
Top Incumbent Vendors
Top Cities in Illinois
| City↕ | Opportunities↕ |
|---|---|
| Unknown | 23 |
| Batavia | 8 |
| Marion | 6 |
| Chicago | 5 |
| Peoria | 3 |
| Hines | 2 |
| Great Lakes | 1 |
| Scott Air Force Base | 1 |
| Springfield | 1 |
| Jerusalem | 0 |
How We Rank These
We score each opportunity on a 0–100 scale using six transparent factors: service fit, contract value, timing urgency, geographic relevance, competition level, and agency buying appetite. Data sourced from SAM.gov and USAspending.gov, refreshed daily.
Read full methodologyExplore Other States
Other Services in Illinois
Frequently Asked Questions
How many hvac contracts are there in Illinois?
Illinois has 50 active federal hvac opportunities right now. RecompeteIQ tracks and ranks all opportunities daily from SAM.gov.
What are the top cities for hvac contracts in Illinois?
Unknown, Batavia, Marion are the top markets based on opportunity count.
Who are the top hvac contractors in Illinois?
The leading incumbent vendors include ONEILL CONTRACTORS INC, DIVERSE SOLUTIONS GROUP INC., SOUTH TOWN REFRIGERATION, LLC. See the Incumbent Vendors table for full rankings.
When do hvac contracts come up for rebid in Illinois?
Most hvac contracts follow 30–48 month cycles. The "Recompetes" section shows contracts estimated to be recompeted within the next 12 months based on historical award patterns.
How can I get notified about new opportunities?
Sign up for the weekly Opportunity Radar to receive a ranked shortlist of the top opportunities across Illinois.
Cite this page
APA
RecompeteIQ. (2026). HVAC Government Contracts in Illinois. Retrieved 2026-05-30, from https://recompeteiq.com/state/il/hvac-contractors
Chicago
RecompeteIQ. "HVAC Government Contracts in Illinois." Accessed 2026-05-30. https://recompeteiq.com/state/il/hvac-contractors.
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