Real estate · County · Illinois
Home inspectors in St. Clair County, IL
The home inspectors in St. Clair County, IL, the household spending behind them and how the market ranks against other counties.
Groundwork market score
Not scored
The score needs at least 5 listings; this market has 3.
- Listings
- 3
- 0 chain locations (0%)
- Official establishments
- n/a
- Fewer than 3, or not published
- Household spending a year
- $1.4B
- On rent and homeowner costs · $14,016 a household
- Housing spending per listing (U.S. = 100)
- 179
- 79% above the U.S.
- Listings per 10k households
- 0.3
- 50% below the U.S.
- Population, 2025
- 250,708
- −2.5% since 2020
See the home inspectors around any address in St. Clair County
The site report maps the home inspectors on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Map listings as of September 2026 show 3 home inspectors in St. Clair County. That is 0.3 per 10,000 households, 50% below the U.S. rate of 0.6.
Household spending on rent and homeowner costs in St. Clair County comes to about $1.4B a year: $14,016 per household, 16% below the U.S. average. Housing spending per business is 79% above the U.S. figure. That figure is all rent and homeowner costs, used as a measure of housing demand; it is not money home inspectors take in.
There is no official count of businesses with payroll classed as building inspection services in St. Clair County: counts under 3 aren’t published.
Population estimates put the population change in St. Clair County from 2020 to 2025 at −2.5%, against +3.1% for the U.S. With 3 home inspectors on map listings, St. Clair County isn’t given a market score: the score needs at least 5, since one listing more or less would swing it.
How St. Clair County compares
The same measures for Illinois and the whole U.S. Housing spending per listing divides all rent and homeowner costs by the listings counted: a measure of housing demand for each business, not money any of them take in, so it is shown against the U.S. (100) only. Households per establishment divides households by the official count.
| Measure | St. Clair County | Illinois | U.S. |
|---|---|---|---|
| Listings per 10k households | 0.3 | 0.6 | 0.6 |
| Housing spending per listing (U.S. = 100) | 179 | 89 | 100 |
| Households per official establishment | n/a | 21,523 | 17,237 |
| Official establishment growth, 2019–2023 | n/a | −5.3% | +6.5% |
| Population growth, 2020–2025 | −2.5% | −0.6% | +3.1% |
| Spending per household on rent and homeowner costs | $14,016 | $14,866 | $16,661 |
| Median household income | $73,854 | $83,390 | $80,734 |
| Groundwork market score | Not scored | 31 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- n/a
- Employees, 2023
- n/a
- Annual payroll, 2023
- n/a
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 30 chain locations
- Listings at the U.S. rate for this spending
- 5The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as building inspection services in St. Clair County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in St. Clair County
- Population, 2025 estimate
- 250,708−2.5% since 2020
- Households
- 100,846
- Median age
- 40.3
- Homes lived in by their owners
- 68%
- Vehicles per household
- 1.8
- Land area
- 658 sq. mi.
- People per square mile
- 386
- Median household income
- $73,854+33.8% vs. 2015–2019, before inflation
- Average household income
- $96,153
- Median home value
- $180,300
- Jobs located here
- 90,959
- Daytime population
- 229,240Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Clair County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the home inspectors on map listings by name and distance.
Or open the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardHome inspectors across Illinois
Every Illinois market ranked →The highest-scoring counties in Illinois for home inspectors, numbered among those based in Illinois, with St. Clair County marked.
Top counties in Illinois
| Market | Score | Listings | Per 10k households | Housing spending per listing (U.S. = 100) | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Cook County, IL | 54 | 113 | 0.5 | 106 | −1.3% | #166 of 415 |
| 2Winnebago County, IL | 52 | 6 | 0.5 | 98 | −0.4% | #180 of 415 |
| 3Kane County, IL | 50 | 12 | 0.6 | 94 | +1.8% | #197 of 415 |
| 4Lake County, IL | 47 | 18 | 0.7 | 92 | +0.8% | #216 of 415 |
| 5McLean County, IL | 46 | 5 | 0.7 | 77 | +0.1% | #230 of 415 |
| 6DuPage County, IL | 46 | 30 | 0.9 | 75 | +0.3% | #232 of 415 |
| 7Kendall County, IL | 44 | 5 | 1.1 | 57 | +9.9% | #257 of 415 |
| 8McHenry County, IL | 41 | 9 | 0.8 | 80 | +2.5% | #272 of 415 |
| 9Madison County, IL | 41 | 8 | 0.7 | 74 | −1.0% | #273 of 415 |
| 10Champaign County, IL | 39 | 6 | 0.7 | 73 | +1.8% | #298 of 415 |
| St. Clair County, IL | Not scored | 3 | 0.3 | 179 | −2.5% |
Other business types in St. Clair County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
- Real estate40
- Real estate agents and brokers49
- Property management36
- Mortgage brokers and lenders38
- Home inspectors
Funeral services
Questions
How many home inspectors are in St. Clair County, IL?
There are 3 home inspectors on map listings in St. Clair County as of September 2026. The listings count home inspectors. No official count is published for building inspection services in St. Clair County: counts under 3 are left out.
How much do households in St. Clair County, IL spend on rent and homeowner costs?
About $1.4B a year, or $14,016 per household. That is 16% below the U.S. average (an index of 84, where 100 is the U.S. average). For the 3 home inspectors on map listings, housing spending per business is 79% above the U.S. figure. The spending figure is all rent and homeowner costs, a measure of housing demand, not money home inspectors take in. It is estimated from the incomes of the 100,846 households in St. Clair County and national spending patterns by income.
How does St. Clair County, IL compare with the U.S. for home inspectors?
St. Clair County has 0.3 home inspectors per 10,000 households, 50% below the U.S. rate of 0.6. The index of housing spending per business is 179, where 100 is the U.S. At the national ratio of home inspectors to household spending, St. Clair County would have about 5, against 3 on map listings.
How fast is St. Clair County, IL growing?
Population estimates put St. Clair County at 250,708 people in 2025, down 2.5% since 2020, against +3.1% for the U.S. It has 100,846 households. Median household income in St. Clair County is $73,854, 9% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 33.8%, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. St. Clair County has no market score for home inspectors: the score needs at least 5 on map listings, and it has 3.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Clair County. It maps the home inspectors on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for home inspectors · All 56 business types in St. Clair County
Screening a site or an acquisition in St. Clair County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.