Delaware property tax appeal deadlines and filing windows for commercial real estate. Verify with your local assessor or appeal board for the specific jurisdiction before filing.
Verify before filing. Statutory deadlines change, and many counties operate on their own schedule inside the state framework. Always confirm the current year's window with the assessor or appeal board for the specific jurisdiction before relying on a date.
State-level deadlines plus major sub-jurisdictions where the schedule diverges from the state default. Where a column says "Varies," confirm the date with the local assessor.
| Month | Type | Event | Date | Details |
|---|---|---|---|---|
| January | RP | Value Notices |
1-Jan | Assessment increase notices (Notice of Change) mailed by Jan 1 |
| March | RP | Appeal Deadline |
15-Mar | Kent County - Jan 31 New Castle Count - Mar 15 Sussex County - Mar 1 |
RP = Real Property · BPP = Business Personal Property · Both = Applies to both
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