Home prices in Naperville run 5% above the national median: $440,000 versus $420,000. Relative to the $105,000 median household income here, the price-to-income ratio comes out to 4.2x.
Property taxes in Naperville run 2.05% of assessed value, above the 1.1% national average. On the median home, that's $9,020 a year, or $752 added to the monthly payment.
Between the $3,228/month mortgage payment and Illinois's state income tax, your real housing cost calculation needs your after-tax number, not your gross salary.
Beyond housing, Naperville's cost of living index sits at 114 (national average = 100), running above the national baseline for groceries, transportation, and everyday services.
Naperville's median home price runs 49% higher than nearby Chicago: $295,000 there versus $440,000 here.