Is your Glen Osborne Borough home over-assessed?
Glen Osborne Borough · Quaker Valley School District · 233 residential parcels
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Free. Shows your assessment, the value the county is implying, comparable sales, and the dollars at stake.
The math for a typical Glen Osborne Borough home
The median residential assessment in Glen Osborne Borough is $278,400. Because the county still uses 2012 values, the Board applies the Common Level Ratio in appeals: at 49.3%, that assessment implies the county thinks the typical home would sell today for $564,706.
Recent validated sales in Glen Osborne Borough (14 since 2024-10-28) run a median of $283 per square foot, which puts the typical home near $695,752. At that value the assessment should be about $343,006.
For the median home the assessment is already at or below the CLR target, so appeals in Glen Osborne Borough turn on the specific house: the 23% flagged here sit well above their neighbors on a per-square-foot basis.
When and how to appeal
Allegheny County's annual appeal window for tax year 2028 is expected to run July 1 to September 1, 2027, matching the 2027 window. Appeals are filed with the Board of Property Assessment Appeals and Review (BPAAR), heard by telephone, and decided on evidence submitted at least ten days before the hearing: comparable sales, a recent appraisal, or your own purchase price. The school district and municipality receive notice and may present their own evidence.
If you bought recently and your purchase price times 49.3% is well above your assessment, expect the opposite: Quaker Valley can file to raise you. 6 Glen Osborne Borough buyers since 2024-10-28 are in that position.
Compare with other municipalities
| Municipality | School district | Likely over-assessed | Median savings | Mills |
|---|---|---|---|---|
| Aleppo Township | Quaker Valley | 41% | $1,948 | 32.78 |
| Bell Acres Borough | Quaker Valley | 39% | $3,184 | 34.35 |
| Edgeworth Borough | Quaker Valley | 13% | $6,044 | 33.43 |
| Glenfield Borough | Quaker Valley | n/a | n/a | 33.43 |
| Haysville Borough | Quaker Valley | n/a | n/a | 35.62 |
| Leet Township | Quaker Valley | 37% | $1,614 | 38.38 |
| Leetsdale Borough | Quaker Valley | 42% | $716 | 38.78 |
| Sewickley Borough | Quaker Valley | 26% | $3,455 | 35.53 |
Figures are computed from Allegheny County assessment and sales records published through WPRDC (extract as of 2026-10-30), the 2027 Common Level Ratio of 49.3% from the Board of Property Assessment Appeals and Review, and 2026 millage rates from the county's community profile pages. "Likely over-assessed" means the assessment exceeds the neighborhood's median sale price per square foot times the home's finished area times the CLR by at least 10 percent, with at least $300 a year at stake. This is an estimate, not an appraisal or legal advice. Any party, including the school district, may appeal and argue for a different value.