Cook County taxes commercial and industrial property at 25% of market value. Homes are assessed at 10%. That gap is why a Cook County warehouse can carry a tax bill that looks like a second mortgage. The county’s incentive classes are the main tool for closing it. Class 6b (industrial), Class 7a and 7b (commercial), Class 8 (distressed areas), and Class C (brownfields) can each cut the assessment level to 10% for a decade. For an owner-user buying or building its own facility, that difference often decides whether an SBA 504 pencils.
Jaken Finance Group is headquartered at 2300 Barrington Road, Suite 400, Hoffman Estates, inside Cook County. We see these incentives on owner-user files every quarter. This guide explains how the classes work, what the Assessor requires, and how a bridge, SBA 504, or SBA 7(a) lender actually counts the savings. Program rules come from the Cook County Assessor’s incentives page and the Class 6b eligibility bulletin. Read those before you sign a contract that depends on the tax savings.
Call (833) 264-7776, pre-qualify, or submit a commercial scenario. Program overview: owner-occupied commercial loans.
The incentive classes at a glance
| Class | Use | Qualifying project | Assessment level | Renewable? |
|---|---|---|---|---|
| 6b | Industrial | New construction, substantial rehab, or reoccupied abandoned building | 10% for 10 years, 15% year 11, 20% year 12 | Yes, with a new municipal resolution |
| 7a | Commercial | Development costs up to $2M (excl. land) in an area in need of commercial development | Same 10/15/20 schedule | Per county rules |
| 7b | Commercial | Development costs over $2M (excl. land), same area test | Same 10/15/20 schedule | Per county rules |
| 8 | Industrial or commercial | Bloom, Bremen, Calumet, Rich, Thornton townships, or certified revitalization areas | Same 10/15/20 schedule | Yes, with local support |
| C | Industrial or commercial | Remediated site with a No Further Remediation letter | Same 10/15/20 schedule | Industrial only |
The standard levels without an incentive are 25% for both commercial and industrial property. A Class 6c reference sometimes appears in old deal files. That class survives only for property classified or applied for by December 31, 1999. New brownfield projects file under Class C.
Class 6b — the industrial owner-user workhorse
Class 6b is built for manufacturers, distributors, trades, and other industrial users. The project must be one of three things:
- New construction of an industrial building.
- Substantial rehabilitation that adds value. Land only qualifies in proportion to added square footage.
- Reoccupation of abandoned property. The building must have been vacant and unused for 24 continuous months and bought for value by a buyer with no financial tie to the seller.
A municipality can find “special circumstances” that make a building count as abandoned sooner. The County Board must validate that finding. There are limits. Special circumstances cannot apply if the building was occupied right up to the sale. They also cannot apply when there was no purchase and the building sat empty for less than 12 months.
Timing is the trap. The eligibility application, a $500 filing fee, and a municipal resolution (or a letter saying one was requested) go to the Assessor before construction or reoccupation starts. For construction, you cannot file more than one year before work begins. If the village later denies the resolution, you lose eligibility even if construction has already started.
What the village resolution must say. It must state that the incentive is necessary for development on that parcel. It must describe the redevelopment objective and your intended use. It must confirm your Economic Disclosure Statement was filed. It must also confirm you signed a prevailing-wage affidavit for the construction work. Budget prevailing wage into the rehab. Many owner-users miss this line and blow the TI budget.
Industrial Growth Zones. In a designated zone, an authorized municipal officer can issue a support letter instead of a full board resolution. That can shorten the calendar by a council cycle. Ask the village economic development office whether your parcel qualifies.
Class 7a and 7b — commercial owner-users
Clinics, retailers, showrooms, and hospitality operators use the commercial classes. The municipality must find the area in need of commercial development. The project must not be feasible without the incentive. Class 7a covers projects up to $2 million in development cost, excluding land. Class 7b covers projects above that line. For 7b, a building counts as abandoned after 12 months vacant, not 24.
A single-tenant medical office an owner-user builds in a south or west suburban corridor is the typical 7b file. A small retail condo purchase with light TI usually is not. It rarely clears the “substantial rehabilitation” bar or the area test.
Class 8 and Class C — geography and contamination
Class 8 targets severe economic stagnation. The ordinance names Bloom, Bremen, Calumet, Rich, and Thornton townships. Municipalities elsewhere can seek certification of an area as in need of substantial revitalization. That certification expires after five years unless renewed. For a south suburban trucking or food-processing user, Class 8 can be the difference between Cook and Will County.
Class C rewards cleanup. You need a No Further Remediation letter from the Illinois EPA. Remediation costs must reach $100,000 or 25% of the prior year’s market value, whichever is less. The application must follow the NFR letter within one year. Commercial Class C ends after 12 years. Industrial Class C can renew.
How lenders treat the incentive
Here is the part most brokers skip. The incentive lowers taxes. Lower taxes raise cash available for debt service. But lenders underwrite what is documented, not what is promised.
| Stage | What the lender typically uses | Why |
|---|---|---|
| Bridge close | Full 25% tax estimate | Resolution may be pending; class change not yet granted |
| SBA 504 / 7(a) at approval | Full tax, or incentive tax with approved resolution plus Assessor eligibility | SBA lenders want to see the class change is real |
| Refinance after first reduced bill | Actual reduced bill | The savings are now a fact |
Cook County bills taxes a year in arrears. Your 2026 taxes are paid in 2027. The first bill showing the incentive can land 18–30 months after you file. A bridge lender at 8.99%–13.5% interest-only needs your model to survive that entire stretch at full tax. An SBA lender will still size the permanent loan on company cash flow. The incentive then becomes cushion, not the thing holding the deal together.
Occupancy rules still apply. SBA requires your company to occupy at least 51% of leasable space in an existing building. Details: SBA loans Illinois and the 51% occupancy rule.
Worked example — Elk Grove Village abandoned warehouse, 6b plus bridge to 504
Composite file. A precision machining company buys a 40,000 sq ft industrial building in Elk Grove Village. It has been empty 26 months. Purchase price is $3,200,000. The buyer plans $600,000 of rehab: power upgrades, office refresh, and dock repair. The company will occupy 100%. The seller wants 30 days. SBA 504 needs 60–90.
| Line | Figure |
|---|---|
| Purchase | $3,200,000 |
| Rehab (prevailing wage budgeted) | $600,000 |
| Project cost | $3,800,000 |
| Bridge at 70% of purchase | $2,240,000 at 10.99% IO |
| Monthly bridge interest | ~$20,515 |
| Post-rehab market value (assumed) | $3,600,000 |
Tax math (illustrative). Cook’s state equalizer has run near 3.0 in recent years. Assume a 9% composite local tax rate.
| Without incentive (25%) | With Class 6b (10%) | |
|---|---|---|
| Assessed value | $900,000 | $360,000 |
| Equalized value (×3.0) | $2,700,000 | $1,080,000 |
| Annual tax at 9% | $243,000 | $97,200 |
| Annual savings | — | $145,800 |
SBA 504 takeout (illustrative). Bank first mortgage is 50% ($1,900,000) at about 7% over 25 years, roughly $13,430 a month. CDC piece is 40% ($1,520,000) at about 6.3% over 25 years, roughly $10,070 a month. The buyer injects 10%, or $380,000. Annual debt service is about $282,000.
The company’s EBITDA before property tax is $620,000.
- At full tax: ($620,000 − $243,000) ÷ $282,000 = 1.34x coverage.
- With 6b in place: ($620,000 − $97,200) ÷ $282,000 = 1.85x coverage.
Both clear a typical SBA floor. The 6b case gives the lender room if the machine shop loses a customer. The full-tax case is the one the bridge and the 504 approval should be built on. The incentive should make a good deal safer. It should not make a bad deal work.
The sequence that protects the incentive:
- Contract with a closing date long enough for a village board meeting.
- Request the Elk Grove Village resolution and file the Assessor application before moving equipment in.
- Close on the bridge. Do not reoccupy until the filing is stamped.
- Rehab under prevailing wage. Move in.
- File the incentive appeal to request the class change once the building is occupied.
- Take out the bridge with the 504 when the CDC and bank approve.
Bridge carry math: 12 months of interest is about $246,000. If the 504 slips to month 16, add roughly $82,000. Size your bridge term at 18 months, not the banker’s 90-day promise.
Local risk — what can break the incentive or the loan
Filing after you start. This is the most common and least fixable mistake. Moving inventory into an abandoned building before the application is filed can end eligibility.
Village politics. The resolution is discretionary. A board can table it, add job-count conditions, or ask for a redevelopment agreement. Get a staff read before you waive contingencies.
Prevailing wage and disclosure. The affidavit and Economic Disclosure Statement are required. Prevailing wage can raise labor costs meaningfully on a small rehab. Get contractor bids at prevailing rates before the bridge draw schedule is set.
Triennial affidavits and job reporting. The Assessor requires periodic reports on use and employment. A missed filing can cost the incentive for that period. Put the reassessment year on the company calendar. Cook reassesses by triennial region: the City, the north suburbs, and the south and west suburbs.
Renewal and sunset. Industrial 6b and Class 8 can renew with a new municipal resolution. Without renewal, the level steps to 15% and then 20% before returning to 25%. The county ordinance itself has incentive provisions scheduled to expire at the end of 2027 unless extended. The County Board has extended these classes before; it is still worth watching.
Tax rate drift. The incentive lowers your assessment level. It does not freeze your tax rate. Levies in some south and west suburban towns can push composite rates above 10%. Stress taxes 15% higher than today’s bill.
Environmental. Former industrial bays need a Phase I regardless. If the Phase I finds contamination, look at Class C before you walk away.
Checklist before you sign
- Confirm vacancy history (24 months for 6b abandoned; 12 months for 7b)
- Call the village economic development office about a resolution or Industrial Growth Zone letter
- File the Assessor application before construction or reoccupation
- Budget prevailing wage and the $500 filing fee
- SBA pre-screen on occupancy, citizenship, size, and use of proceeds
- Bridge sized on full 25% taxes for 18 months
- Phase I on any industrial or auto use
- Calendar triennial affidavits and renewal year
Where these incentives fit with Jaken Finance Group
We are not the Assessor, and we do not file incentive applications for you. We bridge the purchase so you can meet the seller’s clock, match the SBA 504 or 7(a) takeout, and model the file at full tax so the incentive is upside. Investors who will not occupy the building should look at industrial warehouse loans Chicago or commercial lending Illinois instead.
Related Cook County and owner-user guides
- Owner-occupied commercial loans Chicago
- SBA loans Illinois
- SBA loans (national programs) · SBA 504 · SBA 7(a)
- Chicago and Cook County property tax investor guide
- C-PACE financing Chicago
- Bridge now, SBA later
- Bridge loans Chicago
Pre-qualify · Submit a scenario · (833) 264-7776
Incentive eligibility, filing deadlines, and assessment levels are set by the Cook County Real Property Assessment Classification Ordinance and administered by the Cook County Assessor. Verify current rules at cookcountyassessoril.gov. Tax figures above are illustrative composites, not quotes. SBA eligibility is set by the SBA and partner lenders. Bridge financing at 8.99%–13.5% interest-only and DSCR at 5.75%–10.5% apply to qualified Jaken Finance Group files and are subject to change.