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Butler County Common Level Ratio
The 2025 Common Level Ratio for Butler County is 6.0%, and the CLR factor is 16.67. The State Tax Equalization Board certified it for use from 2026-07-01 to 2027-06-30. Assessments in Butler County average 6.0% of market value, the 2nd lowest ratio of Pennsylvania's 67 counties.
| County | CLR (assessed ÷ market) | CLR factor | In effect |
|---|---|---|---|
| Butler | 6.0% | 16.67 | 2026-07-01 to 2027-06-30 |
What the ratio means in Butler County
Multiply a price by the ratio and you get what a home's assessment "should" be at typical Butler County ratios: a $400,000 home works out to an assessment around $24,000. If the actual assessment sits far below that, a sale can invite a school-district assessment appeal that raises the bill; far above, and the owner may be over-paying and have a case to appeal down.
The factor runs the same math in reverse. Multiply an assessed value by 16.67 to estimate market value: a $150,000 assessment in Butler County suggests a market value around $2,500,500. The factor is also what the state uses to compute realty transfer tax on non-arm's-length transfers, where the price on the deed doesn't reflect an arm's-length market value.
See the full 67-county CLR table to compare counties, or the property tax calculator, which uses these ratios for purchase estimates.
Butler County CLR questions
What is the Common Level Ratio in Butler County?
The 2025 STEB-certified Common Level Ratio for Butler County is 6.0%, and the CLR factor is 16.67. It applies from 2026-07-01 to 2027-06-30.
How do I estimate market value from an assessment?
Multiply the assessed value by the CLR factor. In Butler County, a $150,000 assessment times 16.67 suggests a market value around $2,500,500.
When does the CLR change?
STEB certifies a new ratio for every county each year, and it takes effect on July 1. The current Butler County ratio applies 2026-07-01 to 2027-06-30.
Where is the CLR used?
Two main places: assessment appeals, where the ratio converts a market value into what the assessment should be, and realty transfer tax on non-arm's-length transfers, where the factor converts an assessed value into a taxable value.
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Source: PA Department of Community & Economic Development, State Tax Equalization Board. Last verified 2026-07-04. Ratios change every July. This page tracks the current Butler County ratio.