Updated 2026 · Based on median market data for Naperville, IL
The median monthly rent in Naperville, IL is $1,950, translating to $23,400 in annual gross rental income per unit. The rent-to-price ratio is 0.44% — well below the 1% rule, making pure cash flow investing challenging at median prices.
Renters in Naperville spend approximately 20% of the local median household income ($118,000) on rent. This is well below the 30% threshold, suggesting significant headroom for rent increases. Tenants can afford to pay more, which is bullish for landlords.
The vacancy rate in Naperville is 4.2%. This is extremely tight — expect strong tenant demand, quick lease-ups, and leverage to set favorable lease terms. In markets this tight, landlords often see multiple applications per listing. Population growth of 0.5% annually provides stable demand.
Naperville's GRM (price divided by annual rent) is 18.8x. A GRM above 16x means the property is expensive relative to its income. Investors here are typically betting on appreciation rather than current cash flow. For comparison, the national average GRM for investment-grade rentals is approximately 13-15x.
At the median rent of $1,950/mo, a single-family rental in Naperville generates approximately $23,400 in gross annual income. After accounting for 4.2% vacancy ($983 lost), property taxes of $8,800, insurance (~$1,760), and maintenance (~$1,760), the estimated NOI is $10,097 per year, or $841/mo.