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New Report Fall 2026 Housing Affordability Report: every state is less affordable than in late August as average 30-year mortgage rates passed 7%. Read the report

South Barrington, IL Housing Affordability Index

South Barrington, Illinois has an MBR Housing Affordability Index score of 91.1 (Near National Average) as of October 30, 2026, ranking 1196th most affordable of 1,249 scored Illinois cities, compared with 102.2 statewide and 97.4 nationally. On a median-priced $908,300 home with 20% down, the Illinois average 30-year fixed rate of 7.31% means a monthly principal and interest payment of about $4,989, or 27% of the city’s $221,575 median household income.

The MBR Housing Affordability Index (MBR-HAI) for South Barrington is updated every night from live Illinois mortgage rates and U.S. Census Bureau income, home value and housing cost data for the city. A score of 100 equals the national average; higher scores mean homeownership is more affordable.

South Barrington MBR-HAI 91.1 Near National Average
Rank in Illinois 1,196 of 1,249 1 = most affordable
Illinois 102.2 Statewide score
National 97.4 100 = baseline
Avg 30-yr rate 7.31% Illinois lenders
Median home value $908,300 U.S. Census Bureau

South Barrington is 11.1 points below the Illinois score. Scores as of October 30, 2026. See the Illinois index

View South Barrington Mortgage Rates

What It Takes to Buy in South Barrington

$4,989/mo
Principal & Interest
Median home, 20% down, 7.31%
$213,800
Income Needed
To keep the payment at 28% of income
$221,575
Median Household Income
Illinois: $83,390
4.1x
Price-to-Income Ratio
Illinois: 3.2x
$3,589/mo
Median Owner Costs
Mortgage, taxes, insurance, utilities
$4,987/yr
Median Property Tax
Illinois figure
37.5%
Owner Cost Burden
Owners spending 30%+ of income on housing
30.0%
Renter Cost Burden
Renters spending 30%+ of income on rent

Source: U.S. Census Bureau American Community Survey 5-Year Estimates (2024) for South Barrington, Illinois. The rate is the Illinois average 30-year fixed rate from MonitorBankRates, since lenders publish rates by state.

Cite the South Barrington Score

“MonitorBankRates (MBR) Housing Affordability Index, MonitorBankRates.com, October 30, 2026. South Barrington, Illinois score: 91.1 (Near National Average), ranked 1,196 of 1,249 Illinois cities. monitorbankrates.com/housing-affordability-index/illinois/south-barrington”