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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

Somonauk, IL Housing Affordability Index

Somonauk, Illinois has an MBR Housing Affordability Index score of 109.1 (Near National Average) as of October 30, 2026, ranking 1037th most affordable of 1,249 scored Illinois cities, compared with 102.2 statewide and 97.4 nationally. On a median-priced $234,400 home with 20% down, the Illinois average 30-year fixed rate of 7.31% means a monthly principal and interest payment of about $1,287, or 18% of the city’s $84,583 median household income.

The MBR Housing Affordability Index (MBR-HAI) for Somonauk 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.

Somonauk MBR-HAI 109.1 Near National Average
Rank in Illinois 1,037 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 $234,400 U.S. Census Bureau

Somonauk is 6.9 points above the Illinois score. Scores as of October 30, 2026. See the Illinois index

View Somonauk Mortgage Rates

See What You Can Afford in Somonauk, Illinois

Use this Somonauk, Illinois home affordability calculator to see how much house you can afford at today’s Illinois average 30-year mortgage rate of 7.31%. A household earning the Somonauk median income of $84,583, with no other debts and $47,000 down, can afford a home of about $237,153, compared with a median home value of $234,400. Buying the median priced home with 20% down takes a household income of about $80,100 once property tax and insurance are counted.

Somonauk median (Census)
Car, student loan, card minimums
Under 20% adds PMI
Illinois average, 30-year fixed
Somonauk median bill (Census)
Estimate; use your quote
You can afford a home up to
$237,153
At or above the Somonauk median home value of $234,400
Loan amount$190,153
Principal & interest$1,305/mo
Property tax$490/mo
Home insurance$99/mo
PMI$79/mo
Total monthly payment$1,974/mo
Compare Somonauk Mortgage Rates

How much house can you afford in Somonauk?

Most lenders use two limits. Your housing payment, including principal, interest, property tax, homeowners insurance and any PMI, should stay under about 28% of your gross monthly income, and all of your monthly debt payments together should stay under about 36%. The calculator takes whichever limit is lower, then works backward from that payment to the most expensive home it covers at the current rate.

In Somonauk, property taxes run about 2.48% of a home’s value each year, based on the Census median tax bill, which counts against the same monthly budget as the mortgage. Each quarter point move in mortgage rates changes the price you can afford by roughly $3,269 for a median income household. A larger down payment, paying down other debts, or a lower rate from a local lender all raise your budget.

What It Takes to Buy in Somonauk

$1,287/mo
Principal & Interest
Median home, 20% down, 7.31%
$55,200
Income Needed
To keep principal and interest at 28% of income
$84,583
Median Household Income
Illinois: $83,390
2.8x
Price-to-Income Ratio
Illinois: 3.2x
$1,399/mo
Median Owner Costs
Mortgage, taxes, insurance, utilities
$5,819/yr
Median Property Tax
2.48% of median value
35.6%
Owner Cost Burden
Owners spending 30%+ of income on housing
39.5%
Renter Cost Burden
Renters spending 30%+ of income on rent

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

Cite the Somonauk Score

“MonitorBankRates (MBR) Housing Affordability Index, MonitorBankRates.com, October 30, 2026. Somonauk, Illinois score: 109.1 (Near National Average), ranked 1,037 of 1,249 Illinois cities. monitorbankrates.com/housing-affordability-index/illinois/somonauk”