Chester County Board of Assessment Appeals (2026)

Direct answer: For 2026, Chester County annual residential assessment appeals are due Monday, August 3, 2026. The county rule is May 1 through the first business day in August; because August 1, 2026 is a Saturday, the practical deadline is August 3.

File the printed Notice of Intention of Appeal Residential with the Chester County Board of Assessment Appeals, 313 W. Market St., Suite 4202, P.O. Box 2748, West Chester, PA 19380-0991. There is no online portal, email, fax, or electronic filing for assessment appeals; the county says forms must be printed and returned, and the residential fee is $25 per parcel, payable by check or money order to Chester County Treasurer.

The Chester County Board of Assessment Appeals & Assessment Office

Two separate Chester County offices are involved in this process, and the county's own pages sometimes use the names loosely. The Assessment Office — led by Director Jonathan B. Schuck, at 313 W. Market St., Suite 4202, West Chester, PA 19380, phone 610-344-6105, fax 610-344-5902, hours Monday–Friday 8:30 a.m.–4:30 p.m. — sets and maintains property valuations, parcel records, and homestead/Clean and Green enrollment. The Board of Assessment Appeals is the separate three-member board that hears appeals filed against those valuations. Both share the same building and mailing address (Suite 4202), which is why the two get confused, but general assessment or property-record questions go to the Assessment Office's direct line above, while appeal filings go to the Board at the address in the next section.

Filing your Notice of Intention of Appeal only starts the process — it does not decide anything by itself. The Board is the body that actually reviews your case: it receives the form, schedules the hearing described in "What happens after" below, and issues the decision. In other words, the Assessment Office sets the number you're contesting, filing paperwork opens your challenge to it, and the Board of Assessment Appeals is who actually rules on it.

How assessments work in Chester

Chester County’s assessment system is not a yearly countywide reassessment system. The county’s FAQ says the last countywide reassessment model was effective for 1998, and current assessments represent 100% of the appraised full market value as of the base year. That is why an assessment number can look far below today’s Zillow-style market value and still be “normal” for Chester County.

For appeals heard in 2026, the critical number is the county’s Common Level Ratio (CLR): 30.6%. In plain English, the Board first decides what your home is worth in today’s fair-market-value terms, then applies the 30.6% CLR to get the assessment used for taxes. Example: if the Board agrees your home’s fair market value is $520,000, the appeal assessment would be $520,000 × 30.6% = $159,120.

Your property tax bill is driven by three layers: county, municipality, and school district. Chester County’s 2026 county millage is 5.164 mills. Municipal rates vary widely: West Chester Borough is 8.090 mills, West Goshen is 2.000 mills, Tredyffrin is 4.313 mills, Parkesburg is 19.250 mills, and some municipalities show 0.000 mills on the county’s 2026 table. School taxes are usually the largest piece; for example, West Chester Area School District’s 2025-26 rate shown on the county tax-rate table is 23.3845 mills.

Whether you should appeal

Appeal if your current assessment is higher than what your evidence supports after applying the 30.6% CLR. A quick test:

1. Find your current assessment on ChescoPin or your tax bill.
2. Estimate realistic fair market value using an appraisal, your recent arm’s-length purchase, or recent comparable sales.
3. Multiply that value by 0.306.
4. If the result is meaningfully below your current assessment, an appeal may be worth filing.

Worked example using an actual Chester County rate: assume a West Chester Borough home is assessed at $180,000. The owner has a recent appraisal supporting $520,000 fair market value. The 2026 appeal assessment target is $159,120. That is a reduction of $20,880. Using West Chester Borough’s combined county + borough + West Chester Area school rate of 36.6385 mills — 5.164 county + 8.090 borough + 23.3845 school — the estimated annual savings is:

$20,880 × 0.0366385 = about $765 per year.

Do not file just because your market value is much higher than your assessment. In Chester County, the real comparison is your assessment versus market value multiplied by the CLR.

The county does not appear to publish residential appeal success rates, median reductions, or average savings. Its 2026 budget publishes timeliness measures instead: annual appeal hearings are targeted to be completed by October 31, and annual appeal decisions mailed by November 14. Do not rely on mailers or countywide “average reduction” claims unless the source shows Chester County Board results.

Step-by-step how to file

1. Use the right official form. For a typical house, use Notice of Intention of Appeal Residential. Official PDF: https://www.chesco.org/DocumentCenter/View/83194/noiares4pg2026?bidId=. The county’s forms page is https://www.chesco.org/251/Forms. Mobile home owners use the Mobile Home Appeal Form; exemption filers use the Real Estate Exemption form.

2. Mark the appeal type. Annual appeals are for the total assessment and are effective for the following tax year. Interim appeals are for new construction or improvements and must be filed within 40 days of the mailing date on the Assessment Change Notice.

3. Fill in a specific value. The residential form asks what you believe the current fair market value is. Put a number down and make sure it matches your evidence.

4. Choose your hearing option. Chester County’s residential form gives two choices. Option 1 asks the Board to review submitted information instead of scheduling an in-person hearing. Important local trap: the form says sales comparison information will not be considered under Option 1. If your case depends on comparable sales, choose Option 2, an in-person hearing.

5. Prepare evidence. For annual residential appeals, the county asks for recent front and rear photos and three copies of supporting documents. Strong evidence includes a recent appraisal, preferably within six months of the hearing date, recent similar sales, or your ALTA Settlement Statement / Closing Disclosure / HUD-1 if you recently bought the home in an arm’s-length sale. If the purchase was a short sale, bank sale, or foreclosure, the county says to bring a recent appraisal.

6. Pay the fee. Residential appeals are $25 per parcel. Parcels under Act 319 or Act 515 preferential assessment are $50. Commercial/industrial and exemption appeals are $150 as of January 1, 2026. Checks or money orders should be payable to Chester County Treasurer. The county says the fee is not refunded if you fail to appear or withdraw.

7. File on paper. Mail or deliver the completed form and payment to: Board of Assessment Appeals, 313 W. Market St., Suite 4202, P.O. Box 2748, West Chester, PA 19380-0991. The county FAQ is explicit: forms must be printed, completed, and returned; no faxes or electronic copies.

What happens after

The appeal authority is the Chester County Board of Assessment Appeals, a three-member board appointed by the County Commissioners. Hearings are normally held at the Government Services Center, 601 Westtown Road, Room 395, West Chester, PA, unless the notice says otherwise.

After the Board receives your form, it sends a written notice of the date, time, and place. The county says notices are mailed at least 20 days before the hearing. The hearing itself is usually brief: you explain your value, hand in your documents, and answer questions. Your school district and municipality are notified, and taxing districts can participate.

Your appeal may be heard by a single Board member, with the three-member Board later conferring and issuing the decision. For interim appeals, the county says decisions are generally rendered within 3–4 weeks of the hearing. For annual appeals, no results are mailed until after August 1; the county’s 2026 budget target is to mail annual appeal decisions by November 14.

If you disagree with the Board’s result, you may appeal to the Chester County Court of Common Pleas within 30 days of the Board result notice. The county says it does not provide a form for that court appeal.

Local tips

Check homestead/farmstead status before you appeal. Chester County’s Homestead/Farmstead Application is filed with the Assessment-Homestead Office by March 1, and the assessment page describes enrollment as December 15 through the first business day in March. It reduces taxable school assessment for an eligible primary residence; it is separate from an assessment appeal.

Do not forget Clean and Green. If you own qualifying farm, forest, or open-space land, Act 319 Clean and Green enrollment runs March 1 through June 1. That deadline has passed for 2026, but it is worth planning for next year if your property qualifies.

Bring an appraisal if the numbers are close. Chester County strongly encourages a recent appraisal prepared for assessment appeal purposes by a Pennsylvania Certified Appraiser and including interior and exterior inspection.

An appeal can raise, lower, or leave your assessment unchanged. The county FAQ says an annual appeal opens the property to revaluation. If your evidence is weak and your current assessment is low relative to market × CLR, think carefully before filing.

File early next time. The window opens May 1. Waiting until the last week creates practical problems: returned incomplete forms, missing checks, and limited time to fix filing defects before the August deadline.

When Are Property Taxes Due in Chester County?

Chester County mails County annual real estate tax bills on January 15. Municipal (township/borough) and school district tax bills are mailed separately, on February 1, by each local tax collector.

For the County tax bill, Chester County’s own Treasurer FAQ describes three payment periods rather than fixed calendar dates: a 60-day, 2% discount period starting January 15; face value due during the following 60 days; then a 10% penalty on any payment made after the face-value period, for payments made up to December 31 of the current year. The county is explicit that December 31 is the absolute last day a payment can be postmarked or paid, with no exceptions. Chester County’s public FAQ does not publish the exact calendar cutoff dates for the discount and face-value periods (only the “60 days from January 15” rule) — use the specific dates printed on your bill, or call the Treasurer’s Office, rather than assume a date this guide has not confirmed.

Municipal and school tax bills are billed and collected separately from the County bill, each with its own discount/face/penalty schedule set by the local tax collector; check the bill itself or your municipality for those dates.

This is not the same as the assessment appeal deadline above. The appeal deadline is your window to contest your assessed value; the payment due date is when the resulting tax bill must be paid. Missing one does not affect the other, but missing either has real consequences — one forfeits your right to appeal for the year, the other can trigger penalties and interest.

Source: https://www.chesco.org/Faq.aspx?QID=98

Property Tax Exemptions in Chester County

• Homestead/Farmstead Exclusion Program — Chester County residents whose home is an owner-occupied primary residence (homestead) or a qualifying working farm (farmstead); owners of mixed-use properties may qualify for the owner-occupied portion only.. Excludes the same fixed dollar amount of assessed value, per school district, from school property tax for every approved property; the exclusion appears as its own line item on the tax bill, and Chester County’s source does not state one single statewide dollar figure since the excluded amount is set per district. Yes; apply through the Chester County Assessment-Homestead Office (no filing fee); re-application is not required more than once every three years unless you move. Apply during open enrollment, December 15 through March 1 of the following year.. (Source: https://www.chesco.org/254/Homestead-Farmstead-Exclusion-Program)
• Pennsylvania Property Tax/Rent Rebate Program — Pennsylvania homeowners and renters who meet the age/disability criteria: age 65 or older, widows/widowers age 50 or older, or people with disabilities age 18 or older, and household income of $48,110 or less.. Standard rebate ranges from $380 to $1,000; some qualifying property owners may receive supplemental rebates, for a total maximum up to $1,500. Yes, apply annually. Apply by December 31, 2026 for rebates on property taxes or rent paid in 2025.. (Source: https://www.pa.gov/agencies/revenue/ptrr)
• Disabled Veterans' Real Estate Tax Exemption — Pennsylvania resident veterans, and certain surviving spouses, meeting state criteria including honorable or under-honorable discharge, wartime service, principal dwelling ownership/occupancy, qualifying 100% permanent service-connected disability or specified serious service-connected disability, and financial need.. Real estate tax exemption for qualifying principal dwelling; applicants with annual income of $114,637 or less receive a presumption of need under the state source. Yes; apply through the County Director of Veterans Affairs. (Source: https://www.pa.gov/agencies/dmva/pennsylvania-veterans/pa-vetconnect/state-veterans-programs/financial-assistance/retx)

How to Look Up Your Property Record in Chester County

You can look up your property's official record at ChescoPin, Chester County’s own public-records portal — the same tool referenced earlier in this guide for checking your current assessment. Chester County describes ChescoPin as giving access to civil case records, real estate records and statistics, and tax lien records for the county.

For a map-based lookup by owner name, address, or parcel number — including current and historical assessment records — use ChescoViews, Chester County’s free GIS mapping tool. Questions about either tool can go to the county’s GIS office at 610-344-6884 or epinadmin@chesco.org.