Total monthly cost of ownership
Cost to Own a Home in Big Rock, Illinois
A $290,000 home here costs
$2,675per month, all in, with 20% down at today's 7.24% 30-year fixed rate. By the 28% rule that takes a household income of about $114,500 a year.
A standard mortgage calculator would have told you $1,581. The real number is $1,094 higher every month, 69% more than the payment most buyers budget for.
Compare Kane County with anywhere in America · full county breakdown
Small-place caveat: the Census publishes these figures for Big Rock from a five-year rolling sample, and with about 1,208 residents that sample is small. The median home value here carries a much wider margin of error than a big-city figure does, so treat it as indicative rather than exact. The Kane County figures are drawn from a far larger sample if you want a steadier number.
Where every dollar goes
Only the first line is a mortgage payment. Change any assumption above and every figure below recalculates.
Big Rock against Kane County and Illinois
| Measure | Big Rock | Kane County |
|---|---|---|
| Median home value | $290,100 | $303,000 |
| Median property tax | $6,442 | $7,230 |
| Effective tax rate | 2.221% | 2.386% |
| Median gross rent | — | $1,404 |
| Population | 1,208 | 516,097 |
The weather behind that power bill
Big Rock sits in Kane County, which averages a high of 84.0°F in its hottest month and a low of 16.1°F in its coldest, with 33.23" of precipitation a year and 35% of it in a single three-month stretch. That climate drives 822 cooling and 6,364 heating degree days, which is what sets the $134 electricity line above.
See the full climate breakdown for Kane County , month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Kane County
Talk to someone who works this market
These are Big Rock averages. What one specific house costs to own, or what it would sell for today, depends on the street and the condition of the place. We will connect you with one licensed local agent who works Big Rock every week. Free, no obligation, and we never sell your details to a list.
I'm looking to buy in Big Rock I already own here and may sell
Common questions
How much does it cost to own a home in Big Rock?
A $290,000 home in Big Rock, Illinois costs approximately $2,675 per month with 20% down at 7.24%. That is $1,581 principal and interest, $537 property tax, $114 homeowners insurance, $202 utilities and $242 set aside for maintenance.
What is the property tax rate in Big Rock?
Big Rock has an effective property tax rate of 2.221%, based on a median home value of $290,100 and median real estate taxes of $6,442. That is lower than the Kane County average of 2.386%.
What is the average home price in Big Rock?
The median owner-occupied home value in Big Rock, Illinois is $290,100, against $303,000 across Kane County.
Is it cheaper to rent or buy in Big Rock?
Rent data is not published for Big Rock at this level of detail.
What salary do you need to buy a home in Big Rock?
Using the standard 28% rule, housing costs at no more than 28% of gross income, buying the median home in Big Rock, Illinois at today's rate takes a household income of roughly $114,500 a year. That covers the full $2,675 monthly cost, not just the mortgage payment.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for Big Rock, US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance, NAIC average premium for Illinois.
- Electricity price, EIA Electric Power Monthly Table 5.6.A.
- Mortgage rate, Freddie Mac PMMS, refreshed weekly.
- Maintenance (1%/yr) and water and sewer ($68/mo) are national estimates. Every assumption above is editable.