Chicago Property Intelligence

Property tax reassessment shock

Cook County's triennial reassessment system can cause significant tax increases, especially in gentrifying neighborhoods. CaveatBuyer identifies properties where assessed value trails market value and estimates reassessment exposure.

Lead service lines

Chicago has an estimated 400,000 lead water service lines, more than any other US city. CaveatBuyer flags properties with lead service line exposure based on construction era and utility records.

Environmental contamination legacy

Chicago's industrial history means brownfield sites, former factories, and contaminated soil are common, particularly on the South and West sides. CaveatBuyer checks EPA Superfund, Brownfields, and Toxic Release Inventory data for every property.

Basement flooding

Chicago's combined sewer system and flat topography create chronic basement flooding risk in many neighborhoods. Heavy rain events overwhelm the system, causing sewage backups. CaveatBuyer identifies properties in CSO (combined sewer overflow) areas.

Two-flat and multi-unit conversion risks

Many Chicago properties have been converted from single-family to multi-unit or vice versa. Unpermitted conversions can create zoning, insurance, and lending complications. CaveatBuyer's permit history analysis identifies conversion patterns.

What should I check before buying a house in Chicago?

Before buying in Chicago, check property tax assessment history (Cook County's triennial reassessment can cause large increases), lead service line status, permit history for unpermitted work, environmental contamination proximity, FEMA flood zone status, and building era risks. CaveatBuyer's free Foundation Report covers all of these. The $49 Intelligence Report adds Insurance Difficulty Score, Flip Detection, and Tax Reassessment analysis.

How do I check for lead pipes in a Chicago property?

Chicago has an estimated 400,000 lead water service lines — more than any other US city. Most homes built before 1986 have lead service lines connecting them to the water main. CaveatBuyer identifies lead service line exposure based on construction era and available utility records. Enter any address at caveatbuyer.com for a free assessment.

What are common issues with older homes in Chicago?

Pre-1940 Chicago homes (greystones, bungalows, two-flats) commonly have knob-and-tube wiring, lead paint, lead service lines, cast iron drain pipes, and aging masonry requiring tuckpointing. Homes from the 1940s-1960s often have asbestos insulation and galvanized steel pipes. Chicago's freeze-thaw cycles accelerate deterioration of these aging systems.

Will my property taxes increase after buying in Chicago?

Likely yes. Cook County reassesses property values triennially. If the sale price is significantly higher than the current assessed value — common in appreciating neighborhoods — expect a reassessment increase. CaveatBuyer's Tax Reassessment analysis identifies the gap between assessed and market value and estimates potential tax exposure.

How much does a CaveatBuyer report cost in Chicago?

CaveatBuyer's Foundation Report is free for any Chicago-area address. The full Intelligence Report costs $49 and adds proprietary analysis. No subscription required.