How are commercial properties assessed for property tax purposes in Illinois?
Commercial properties in Illinois are assessed based on fair market value, but determining value can be more complex than with residential properties. According to attorney Nora Devine, assessors often rely on the income approach, evaluating net revenue from tenants in office, retail, or industrial buildings. Market sales also play a role, but unusual investor activity—such as real estate investment trusts overpaying for multifamily assets—can distort valuations. This creates challenges for assessors, who must balance market sales with sustainable income levels when valuing properties.
How have recent market changes impacted commercial property tax assessments?
The office sector has seen significant declines in value since COVID-19, with high vacancy rates and conversions to residential use widely anticipated in downtown Chicago. While some well-leased, high-quality buildings still sell at strong prices, many distressed office properties sell for much less. Assessors face pressure from owners who want assessments tied to low sales, while governments often cite stronger sales to justify higher values. Ultimately, disputes frequently escalate into battles of expert appraisers in appeals before deciders of fact.
How does zoning influence commercial property assessments?
Zoning regulations have a major impact on value. Devine recalls representing a Lake County property zoned residential despite being surrounded by commercial uses. Buyers repeatedly withdrew when they couldn’t secure the zoning change that they needed for their use, reducing the property’s value. Yet the assessor still applied commercial market data to justify a tax increase. This case highlights how restrictive zoning can suppress property value—and how unfair it is to tax as commercial when zoning prevents commercial use. Liberal zoning and higher density allowances typically increase a property’s marketability and taxable value.
Does the Property Tax Extension Limitation Law (PTELL) apply to commercial properties?
Yes. PTELL limits taxing bodies to increases of no more than about 5% above the prior year’s levy, absent voter approval. This applies equally to residential and commercial properties. However, a recent legislative change allows districts to levy beyond PTELL limits to cover refunds from successful commercial appeals at the Illinois Property Tax Appeal Board (PTAB) or in court. This prevents school districts from facing budget shortfalls due to large refunds, but increases the overall burden on taxpayers.
How can a commercial property owner appeal an assessment?
Because most commercial properties are titled in corporations, appeals almost always require an attorney. Owners typically present income statements, rent rolls, and vacancy records to support reductions. Sophisticated jurisdictions may apply the income approach, while less experienced assessors often default to cost-based software like Marshall & Swift. However, cost does not always equal value—especially for big-box retail, which can depreciate to near land value within a decade. Devine emphasizes that hiring a qualified appraiser strengthens appeals by providing credible, expert valuation reports in adversarial proceedings.
How do changes in the commercial real estate market affect the tax burden on homeowners?
Declining commercial values shift the property tax burden onto residential taxpayers. Schools and local governments levy a fixed amount regardless of changes in assessed values. If commercial assessments drop, tax rates rise to compensate, forcing homeowners to pay more. Conversely, when commercial properties thrive, the stronger tax base can put downward pressure on residential rates. This is why retaining a healthy commercial tax base is crucial for balanced taxation. Communities that lose businesses—such as areas near the Indiana state line—often face runaway residential tax increases. Communities with high-performing schools and a low local rate will attract more residents and investment thereby further strengthening the schools and driving the local tax rate even lower.
What strategies can commercial property owners use to minimize tax liability?
Devine recommends consulting a property tax attorney before purchasing a property. Key strategies include:
- Proper allocation of purchase price: Distinguishing between real estate, business value, and inventory or other personal property prevents inflated assessments.
- Timing of transactions: In Cook County’s three-year assessment cycle, closing after township publication may preserve lower assessments for the full three year cycle.
- Upfront projections: Attorneys can model worst-case tax scenarios to determine if a deal remains viable even in light of the asset’s new tax position.
By planning ahead, buyers can reduce risk and avoid unexpected tax burdens after acquisition.