Allegheny County Property Tax Guide
Allegheny County Property Tax: The 2026 Homeowner Guide
Everything Pittsburgh-area homeowners need to know about millage rates, assessments, the new common level ratio, and how to appeal your Allegheny County property tax bill.
Table of Contents
How Allegheny County property tax works
Allegheny County property tax is the single largest recurring cost most Pittsburgh-area homeowners pay outside of their mortgage principal and interest. It funds three different layers of government — the County, your municipality, and your school district — and unlike some neighboring counties, the bill arrives in three separate envelopes throughout the year.
Your Allegheny County property tax bill is calculated using a simple formula: your assessed value multiplied by the millage rate set by each taxing body. A mill is one-tenth of a percent (0.001), so a millage rate of 4.73 means $4.73 in tax for every $1,000 of assessed value. That means a home assessed at $200,000 in the City of Pittsburgh pays roughly $946 to the County alone, before municipal and school district millage are layered on top.
The Allegheny County Office of Property Assessments maintains the official assessed value for every parcel. The Treasurer’s Office collects the County portion. Your municipality (City of Pittsburgh, Mt. Lebanon, Cranberry Township, etc.) collects its own taxes, and your school district (Pittsburgh Public Schools, Mt. Lebanon SD, North Allegheny SD, and so on) collects its own. Three bills, three deadlines, three sets of rules.
Current millage rates & three taxing bodies
Allegheny County’s 2026 county-level millage is 4.73 mills, unchanged for several years. The City of Pittsburgh adds 8.06 mills for its general fund. Pittsburgh Public Schools layers on the largest single rate at 10.25 mills. Add them up and a Pittsburgh homeowner is paying roughly 23.04 mills on assessed value — about 2.3% per year.
Combined millage examples (2026)
| Municipality | County | Municipal | School | Total Mills |
|---|---|---|---|---|
| City of Pittsburgh | 4.73 | 8.06 | 10.25 | 23.04 |
| Mt. Lebanon | 4.73 | 5.20 | 25.99 | 35.92 |
| Upper St. Clair | 4.73 | 3.80 | 24.05 | 32.58 |
| Cranberry Twp. (Butler Co.) | — | 3.50 | — | See Butler Co. |
| Fox Chapel Borough | 4.73 | 1.10 | 21.24 | 27.07 |
| Mt. Washington (Pgh) | 4.73 | 8.06 | 10.25 | 23.04 |
| Shaler Township | 4.73 | 3.93 | 24.94 | 33.60 |
Two-thirds of every Allegheny County property tax dollar typically goes to the school district. That’s why the same home can have a wildly different total tax bill depending on which side of a school district line it sits on. A house assessed at $250,000 in Mt. Lebanon pays roughly $8,980 a year. The same assessed value in Pittsburgh Public Schools pays about $5,760. Same house, different ZIP code, $3,200 swing.
Understanding your assessment
Your assessment is the County’s estimate of what your home was worth in the base year — currently 2012. The County reassessed every parcel in Allegheny County in 2013 and has not done a full reassessment since. That means a home that has appreciated substantially over 13 years still sits on the books at its 2012 number, unless something triggered an interim change.
What triggers a reassessment
- A building permit for substantial improvement (additions, dormers, finished basements, new garages)
- New construction on a vacant lot
- A formal appeal filed by the owner, the school district, or the municipality
- A successful “newcomer tax” appeal by the school district after a sale (this practice has been challenged in court but still happens)
- Subdivision or consolidation of parcels
Where to find your current assessment
Every Allegheny County parcel and its assessed value is publicly searchable. The official tool is the Allegheny County Real Estate Portal at alleghenycounty.us/real-estate. You can search by address, owner name, or parcel ID. The portal shows your land value, building value, total assessed value, sale history, and the current tax bills owed to the County.
The Common Level Ratio (CLR) explained
The Common Level Ratio is the most important number in Allegheny County property tax appeals — and most homeowners have never heard of it. The CLR is the State Tax Equalization Board’s annual estimate of the ratio between assessed values (still in 2012 dollars) and current market values. As Pittsburgh-area home prices climb, the CLR drops, and that creates a massive opportunity to lower your tax bill.
Recent CLRs for Allegheny County
| Tax Year | Common Level Ratio | What this means |
|---|---|---|
| 2022 | 81.1% | Assessment ≈ 81% of market value |
| 2023 | 63.6% | Assessment ≈ 64% of market value |
| 2024 | 54.5% | Assessment ≈ 55% of market value |
| 2025 | 52.7% | Assessment ≈ 53% of market value |
| 2026 | 54.5% (effective) | Assessment ≈ 55% of market value |
Here’s why the CLR matters: when you appeal, the Board of Property Assessment Appeals & Review will divide your appraised current market value by the CLR to arrive at a new assessment. If your home is worth $400,000 today and the CLR is 54.5%, your assessment should not exceed $400,000 × 54.5% = $218,000. If your current assessment is $300,000, you have a textbook over-assessment case.
Worried your assessment is too high?
Our team has helped hundreds of Allegheny County homeowners interpret assessments and decide whether an appeal is worth it. Book a free 15-minute call.
Allegheny County property tax search & lookup
To run an Allegheny County property tax search, head to the County’s Real Estate Portal. The portal gives you everything in one place: assessed value, sale history, owner of record, deed reference, and current and prior year tax bills.
How to do an Allegheny County property tax lookup in 60 seconds
- Visit alleghenycounty.us/real-estate and click “Search Real Estate”
- Enter your property address (or parcel ID if you know it)
- Click into your parcel record
- Note the “Total Value” line — this is your current assessment
- Click the “Tax” tab to see County, municipal, and school bills
- Use the “Sales History” tab to validate your purchase price against your assessment
If you’re researching a property you’re considering buying, the same portal works. Look at the assessed value relative to the asking price. Multiply the asking price by the current CLR — if the assessment is significantly higher than that result, the property is at risk of an upward appeal by the school district after closing.
How to appeal your assessment
Allegheny County property tax appeals are filed annually, with a hard deadline of March 31 for the following tax year. (For interim assessment changes — like after a permit — you have 40 days from the change notice.) The process is administrative, not adversarial, and you do not need an attorney for the first hearing — though for assessments over roughly $400,000 in market value, hiring one usually pays for itself.
The 5-step appeal process
- Pull your assessment and the CLR. Confirm there is actually a gap.
- Build your evidence. A recent appraisal is the gold standard. Otherwise, three to five strong comparable sales (similar size, age, ZIP, condition, sold within 12 months) will work.
- File the appeal. Submit Form BPAAR-1 to the Board of Property Assessment Appeals & Review by March 31.
- Attend the hearing. A hearing officer will review your evidence and the County’s. School districts and the municipality may also appear if they have a stake.
- Receive your decision. The Board issues a written decision. Either side can appeal to the Board of Viewers and ultimately Common Pleas Court within 30 days.
When NOT to appeal
Be cautious if (1) your assessment is already at or below your purchase price × CLR; (2) you’re inside a school district that aggressively counter-appeals upward (the Pittsburgh Public Schools district historically files thousands of appeals each year); or (3) you’ve made significant unpermitted improvements that an appraisal might surface.
Property tax exemptions & homestead exclusion
Allegheny County offers several property tax relief programs that many homeowners are eligible for but never apply to. Two stand out for typical owners:
Homestead Exclusion
The Homestead Exclusion shaves a fixed dollar amount off your assessed value for school district tax purposes — currently $18,000 in Pittsburgh Public Schools and varying amounts in other districts. You must own and occupy the home as your primary residence and file a one-time application with the County. There is no income test.
Senior Citizen Tax Relief (Act 77)
Allegheny County residents age 60+ with household income under approximately $30,000 (or 65+ with income under approximately $35,000) qualify for a 30% discount on the County portion of their tax bill. Applications are taken annually through the Allegheny County Treasurer.
PA Property Tax/Rent Rebate Program
This is a state program — not County — that issues rebate checks of up to $1,000 to seniors, widows/widowers age 50+, and people with disabilities, based on income. The threshold has been raised in recent years and now reaches household incomes up to $45,000.
Buying or selling in Allegheny County?
Property taxes are one of the biggest line items in any deal. We model the after-tax math for every offer we write or accept.
Property tax by municipality (key examples)
Here’s how an identical $300,000 assessed-value home (roughly $550,000 market value at the 2026 CLR) compares across popular Allegheny County municipalities. These are 2026 estimates and assume no exclusions.
| Municipality / School | Total Mills | Annual Tax | Monthly Tax |
|---|---|---|---|
| City of Pittsburgh / PPS | 23.04 | $6,912 | $576 |
| Mt. Lebanon SD | 35.92 | $10,776 | $898 |
| Upper St. Clair SD | 32.58 | $9,774 | $815 |
| Fox Chapel Area SD | 27.07 | $8,121 | $677 |
| North Allegheny SD | 27.95 | $8,385 | $699 |
| Shaler Area SD | 33.60 | $10,080 | $840 |
| Bethel Park SD | 29.40 | $8,820 | $735 |
| Quaker Valley SD | 30.10 | $9,030 | $753 |
Pittsburgh Public Schools’ lower combined rate is the reason the City often appears more affordable than the south or north suburbs on a tax basis — even when home prices are similar. But monthly tax cost is only one variable. School performance, walkability, parking realities, and resale velocity all factor in. We model the full picture for every client buying across school district lines.
Allegheny County property tax FAQ
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