Illinois Home Affordability: $147K Median + Remediation Costs
Median: $146,900 · Remediation: $1,166-$2,901 · 1,583 ZIP codes · Updated 2026-06-27
Data: U.S. Census Bureau ACS, EPA, FEMA Last verified: 2026-06-27
ZipCheckup tracks home-affordability and environmental-remediation data for 1,583 ZIP codes in Illinois; the median home value is $146,900. Estimated water and environmental remediation costs range from $1,166 to $2,901, with a typical mid-range of $1,965. The remediation-to-home-value ratio is 1.5%, a measure of financial exposure for buyers.
City Water Quality Map: Illinois
Each circle represents a city. Size indicates population, color indicates water quality grade. Tap a circle for details.
Remediation Cost Overview
Cost ranges are estimates based on national averages. Actual costs vary by location, contractor, and scope of work. Get 3 quotes before proceeding.
Remediation Cost Breakdown
Average remediation cost by component in Illinois.
Cost estimates based on EPA, FEMA, and industry data. Actual costs vary by location and scope. Get multiple quotes.
Most Affordable Cities in Illinois
| # | City | Median Home Value | Population | |
|---|---|---|---|---|
| 1 | Gorham | $27,500 | 1,143 | View → |
| 2 | Cairo | $28,900 | 1,821 | View → |
| 3 | Castleton | $29,800 | 676 | View → |
| 4 | Mound City | $33,800 | 526 | View → |
| 5 | Maunie | $36,700 | 6,307 | View → |
| 6 | Lovejoy | $37,200 | 463 | View → |
| 7 | Grand Tower | $37,500 | 559 | View → |
| 8 | Springerton | $39,100 | 176 | View → |
| 9 | Dowell | $43,600 | 1,188 | View → |
| 10 | Joppa | $44,000 | 6,735 | View → |
Most Expensive Cities in Illinois
| # | City | Median Home Value | Population |
|---|---|---|---|
| 1 | Kenilworth | $1,409,800 | 2,514 |
| 2 | Glencoe | $1,345,200 | 8,849 |
| 3 | Winnetka | $1,073,700 | 12,475 |
| 4 | Hinsdale | $988,000 | 17,900 |
| 5 | Golf | $957,600 | 497 |
| 6 | Lake Forest | $899,200 | 19,762 |
| 7 | Wilmette | $800,100 | 27,087 |
| 8 | Oak Brook | $733,300 | 15,811 |
| 9 | Western Springs | $691,300 | 13,274 |
| 10 | River Forest | $676,900 | 11,717 |
Home Affordability Overview
The median home value across 1,335 ZIP codes in Illinois is $147K, ranging from $28K to $1.4M.
Beyond purchase price, homeowners should budget for safety remediation. Average remediation costs in Illinois range from $1K (basic) to $3K (comprehensive), with a mid-range estimate of $2K.
Equity Trap Analysis
An "equity trap" occurs when remediation costs consume a disproportionate share of home equity, making it difficult to sell or refinance without a loss.
In Illinois, the average remediation cost represents 1.3% of the median home value. This ratio is within manageable range for most homeowners, though individual ZIP codes may vary significantly.
The average equity trap ratio across Illinois is 1.53%. ZIP codes with ratios above 10% represent areas where remediation costs may significantly impact home equity.
Remediation Cost Breakdown
Average cost per remediation component in Illinois:
| Component | Average Cost | Description |
|---|---|---|
| lead | $182 | Lead service line replacement and pipe remediation |
| radon | $799 | Radon mitigation system installation |
| filtration | $92 | Whole-house or point-of-use water filtration |
| flood insurance | $769 | Annual flood insurance premium (NFIP) |
| pfas | $123 | PFAS treatment and filtration system |
Cost ranges are estimates based on national averages. Actual costs vary by location, contractor, and scope of work. Get 3 quotes before proceeding.
Most Affordable Cities
| Rank | City | Median Home Value | Population |
|---|---|---|---|
| 1 | Gorham | $28K | 1,143 |
| 2 | Cairo | $29K | 1,821 |
| 3 | Castleton | $30K | 676 |
| 4 | Mound City | $34K | 526 |
| 5 | Maunie | $37K | 6,307 |
| 6 | Lovejoy | $37K | 463 |
| 7 | Grand Tower | $38K | 559 |
| 8 | Springerton | $39K | 176 |
| 9 | Dowell | $44K | 1,188 |
| 10 | Joppa | $44K | 6,735 |
Most Expensive Cities
| Rank | City | Median Home Value | Population |
|---|---|---|---|
| 1 | Kenilworth | $1.4M | 2,514 |
| 2 | Glencoe | $1.3M | 8,849 |
| 3 | Winnetka | $1.1M | 12,475 |
| 4 | Hinsdale | $988K | 17,900 |
| 5 | Golf | $958K | 497 |
| 6 | Lake Forest | $899K | 19,762 |
| 7 | Wilmette | $800K | 27,087 |
| 8 | Oak Brook | $733K | 15,811 |
| 9 | Western Springs | $691K | 13,274 |
| 10 | River Forest | $677K | 11,717 |
What Homebuyers Should Budget For
When purchasing a home in Illinois, consider these potential safety-related expenses beyond the purchase price:
- Water testing - $150-$400 for comprehensive lab analysis
- Lead inspection - $300-$500 for paint and water testing
- Radon test - $150-$250 for professional testing
- Flood insurance - $700-$1,500/year if in a flood zone
- Water filtration - $200-$3,000 depending on system type
- Lead pipe replacement - $3,000-$15,000 for service line
- Radon mitigation - $800-$2,500 for sub-slab depressurization
Cost ranges are estimates based on national averages. Actual costs vary by location, contractor, and scope of work. Get 3 quotes before proceeding.
Data Sources
- Home values: U.S. Census Bureau American Community Survey (B25077)
- Remediation costs: National average estimates from contractor surveys and industry data
- Flood insurance: FEMA National Flood Insurance Program
Updated daily.
Buying a home in Illinois?
Remediation costs vary widely by ZIP code. Check your specific area to understand what you might need to budget beyond the purchase price.
Compare ZIP Codes →Frequently Asked Questions
What is the median home value in Illinois?
The median home value across 1,335 ZIP codes in Illinois is $147K, ranging from $28K to $1.4M. Values vary significantly by county and city.
How much does home remediation cost in Illinois?
Average home remediation costs in Illinois range from $1K (basic) to $3K (comprehensive). The mid-range estimate is $2K. Actual costs vary by location, condition, and scope of work.
What is an equity trap in home safety?
An equity trap occurs when remediation costs consume a disproportionate share of home equity. In Illinois, the average mid-range remediation cost ($2K) represents 1.3% of the median home value ($147K). Potential remediation costs are a factor in purchase decisions.
What home safety issues should I budget for in Illinois?
Common remediation needs include lead pipe replacement, water filtration systems, radon mitigation, flood insurance, and PFAS treatment. Costs vary by ZIP code - the report for your specific area provides a personalized cost estimate.
How do remediation costs compare to home values in Illinois?
At a median home value of $147K and mid-range remediation cost of $2K, remediation represents approximately 1.3% of home value in Illinois. This ratio varies widely by ZIP code.