Delaware County property taxes: how your assessment becomes a tax bill
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Explainer video with captions. (Draft for review.)
Delaware County's factor: 1.83
Delaware County assessments are based on July 1, 2019 values (in effect since 2021). To bring an assessment up to today's market, the state publishes a factor for each county. For Delaware County it's 1.83, for appeals filed July 1, 2026 – June 30, 2027.
Worked example
A home assessed at $230,000 × 1.83 = $420,900. That's the value the county taxes it as if it's worth. If the home would sell for about $372,000, a fair assessment would be about $372,000 ÷ 1.83 ≈ $203,279. At Upper Chichester Twp's rates, that difference is about $1,052 a year, every year.
Illustration only, at a typical sale price for the county; the Board uses the state's unrounded figure, so exact results differ slightly.
Filing facts for Delaware County
General information from the county's published rules, not legal advice. Check the county's current rules before you file.
| Where | Delaware County Board of Assessment Appeals · official page |
|---|---|
| Deadline | Annual appeals are due August 1. August 1, 2027 is a Sunday, so the last safe day is Friday, July 30, 2027 (hand delivery or a Post Office counter postmark). File as soon as you're ready; the deadline is the last day, not the target. |
| Filing fee | $50 for a residential property. |
| How to file | Postmark or date-stamp by the deadline. |
| Evidence copies | An appraisal, or a sale of the home within the past year. The Board states that broker price opinions are not accepted. |
| Hearing | You (the owner) or a PA-licensed attorney present the appeal. Your hearing notice gives the date, time and how the hearing is held. |
| Evidence | Delaware County's Board asks for an appraisal or a sale of the home within the past year. It states that broker price opinions are not accepted as evidence. |
| Look up your assessment | Delaware County property records |
Services in Delaware County
Complete Tax Savings Analysis
$19.99
Your full numbers, emailed: taxes by taxing authority, yearly savings at your value (plus 5- and 10-year totals), your county's deadline, and deadline reminder emails.
DetailsThe Playbook for your county
$99.99
A step-by-step guide, with short videos, to handling your own appeal through your county's process: checking your numbers, filling out the application, finding recent sales of homes like yours, hearing day and what comes after.
DetailsStrongest evidence: an appraisal
Free referral
We'll email you names of PA-certified appraisers who work in your county; you hire and pay the appraiser directly. Delaware County's Board asks for an appraisal or a recent sale of the home, and doesn't accept broker price opinions.
We don't appraise your home or give an opinion of its value. If you choose it, our calculator uses a third-party automated estimate (a computer model, not an appraisal); you decide your own opinion of value and state it to the Board. Automated estimates never go on anything you file with the Board. PA Tax Crushers and our broker are not attorneys and do not provide legal advice or represent you in your appeal.