Property Taxes

Outside the San Francisco Bay Area, Cook County is currently in the worst property crisis in the United States. Starting in 2007 and continuing on into 2025, property taxes have been growing exponentially. A combination of population growth, neighborhood revitalization, and chronic mismanagement has produced an environment where property taxes have increased 78% in some … Read more

Dire Property Tax Situation in Cook County The housing market is tough across the country, but for residents of Cook County, Illinois, property taxes make homeownership a particularly challenging game. Appraisal districts across the United States rely on algorithms for mass appraisal. These aren’t exact measurements either, but more “educated” guesses of what a given … Read more

In February 2025, O’Connor expanded its property tax services with a new office in New York with Frank Grampone leading the office. Frank Grampone works with commercial property owners in NYC and residential property owners in Nassau and Suffolk Counties. With a wealth of experience in New York property tax services, Frank offers expert advice … Read more

Property taxes are due soon for Cook County property owners! Steer clear of late fees and penalties by keeping up to date on all property tax deadlines. Be Aware of Deadlines & Avoid Late Fees For Cook County property owners, your 2024 property taxes are due in two installments. The Cook County Treasurer has already sent out … Read more

If you are a property owner in Illinois, you should make it a habit to check your property values every year, even if you are not in a reassessment year. The reason for this is because in Illinois, property values can be adjusted for taxes in two very different ways. These methods of adjustment are … Read more

The owner of the 3-unit triplex at 1633 S Avers Avenue (Chicago IL 60623) saw their Cook County property tax assessment increase 2,080% between 2023 and 2024. This is not a typo. The Cook County Assessor increased their opinion of the value of this property from $16,050 ($5,350/unit) to $350,000 ($116,667/unit). How can the value … Read more

The Cook County Assessor raised the market value of 626 N Long Avenue, Chicago by 2,797% in just one year! This is for a duplex in West Chicago Township.

Residential Assessment Somewhat Higher The residential property market values of property owners in New Trier Township, Cook County can increase annually. In 2024, the residential property market value in New Trier Township saw a slight increase of 1.3%, increasing from $19.7 billion in 2023 to $19.9 billion. The properties with the most substantial value increase of … Read more

Residential Assessment Surges Annually, residential values rise in Cook County for property owners. Residential property in Lyons Township had a 0.6% increase illustrating the growth from $14.8 billion in 2023 to $14.9 billion in 2024. The lowest value houses with a range of $1MM to $1.5MM had a great assessment increase between 2023 and 2024. … Read more

Residential Assessment Practically Unchanged The residential property values of property owners in Maine Township, Cook County, experienced a negligible increase between 2023 and 2024. The value of the residential property market in Maine Township increased by 0.5% in 2024, from $15.6 billion in 2023 to $15.7 billion. Higher market value properties had the highest increase … Read more