Rental numbers for Boone County, IL
Zillow does not publish enough data to estimate cash flow for this county.
- Gross yield
- n/a
- no Zillow rent index
- Median ZIP yield
- n/a
- 0 ZIPs with full data
- Cash flow
- n/a
- at 7.78%, 25% down
- Typical price
- $288,000
- Zillow ZHVI, Aug 2026
- Typical rent
- n/a
- Zillow ZORI, Aug 2026
ZIP codes in Boone County
5 with published figures
| 61065Poplar Grove | $280,000 | $1,760* | 7.5% | 2.8% | -$852 | n/a |
| 61011Caledonia | $383,000 | $1,760* | 5.5% | 1.2% | -$1,670 | n/a |
| 61008Belvidere | $266,000 | $1,180* | 5.3% | 0.9% | -$1,242 | n/a |
| 61012Capron | $275,000 | $1,170* | 5.1% | 0.1% | -$1,451 | n/a |
| 61038Garden Prairie | $336,000 | $1,260* | 4.5% | 0.2% | -$1,747 | n/a |
* HUD Fair Market Rent, 2 bedroom, where Zillow publishes no rent index. Conservative.
Trends
Five years to August 2026
- Price, 12 months
- +6.5%
- Rent, 12 months
- n/a
- Rent minus price growth
- n/a
- Property tax
- 2.18%
- effective rate, ACS 2024
Show the numbers
| Month | Typical value |
|---|---|
| Aug 2021 | $204,469 |
| Aug 2022 | $227,644 |
| Aug 2023 | $236,003 |
| Aug 2024 | $253,909 |
| Aug 2025 | $270,164 |
| Aug 2026 | $287,800 |
HUD Fair Market Rent
FY2027, Rockford, IL MSA
| Bedrooms | Studio | 1 bed | 2 bed | 3 bed | 4 bed |
|---|---|---|---|---|---|
| Fair Market Rent | $816 | $896 | $1,172 | $1,542 | $1,578 |
The 40th percentile gross rent for a standard unit, set by HUD each October and used for Section 8 payment standards. It runs below market rent; Zillow's index is shown above where it exists.
Supply
- Permits per 1,000 households
- 3.4
- 66 units, last 12 months
- National percentile
- 38th
- among US counties
Tools
Test a listing in Boone County against today's rate.
Open the calculatorPart of the Rockford, IL metro.
Questions
- Is Boone County good for rental property?
- Zillow does not publish enough data to estimate cash flow for this county. The figures use a typical home, 7.78% with 25% down and default costs shown on each ZIP page. They describe the market, not any one property.
- What is the property tax rate in Boone County?
- About 2.18% of value, from Census ACS median taxes paid over median home value. On a $288,000 home that is about $6,283 a year.
- What is Fair Market Rent in Boone County?
- HUD's FY2027 Fair Market Rent here is $896 for a 1-bedroom, $1,172 for a 2-bedroom and $1,542 for a 3-bedroom.
Sources and method
- Zillow Home Value Index (ZHVI), mid tier, smoothed and seasonally adjusted
Zillow Research. Read: 2026-08.
Typical home value by ZIP, county, metro and state, and the price trend.
- Zillow Observed Rent Index (ZORI), all homes plus multifamily, smoothed
Zillow Research. Read: 2026-08.
Typical market rent by ZIP, county and metro, and the rent trend (tier A pages).
- HUD Small Area Fair Market Rents, FY2026
US Department of Housing and Urban Development. Read: FY2026.
Rent by bedroom count for every ZIP. The rent used on tier B pages, and a reference on all pages. It is the 40th percentile gross rent, so it runs below market.
- HUD Fair Market Rents by county, FY2027
US Department of Housing and Urban Development. Read: FY2027.
County rent by bedroom count on county pages.
- American Community Survey 5-year estimates, 2020 to 2024 (B25103 median real estate taxes paid, B25077 median home value, B11001 households)
US Census Bureau. Read: 2020 to 2024.
Effective property tax rate (median taxes paid divided by median value) by ZIP code tabulation area, county and state; households for the permits ratio.
- Freddie Mac Primary Mortgage Market Survey, 30-year fixed (FRED series MORTGAGE30US)
Freddie Mac via the Federal Reserve Bank of St. Louis. Read: 2026-09-24.
The weekly 30-year rate. The site adds a disclosed investor premium to it for the loan payment.
- Building Permits Survey, county monthly files
US Census Bureau. Read: 2025-09 to 2026-08.
New housing units permitted in the last 12 months per 1,000 households, a supply-pressure signal.
Data: Zillow Research (ZHVI, ZORI), HUD, US Census Bureau, Freddie Mac. Every formula is on the methodology page.
Estimates from public data for a typical property. Not investment, tax or legal advice. Your property, financing and costs will differ.