Sussex County, DelawareProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- Early August 2026; Sussex County's annual tax-bill notices generally begin mailing in early August; the exact 2026 mailing date was not published in the official source reviewed.
- Payment deadline
- September 30, 2026; Sussex County's annual county property-tax deadline is September 30, with penalties for payments after the deadline.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
April 30, 2026 for the Sussex County over-65 exemption application; the county form requires the applicant to be 65+ by April 30 and meet the residency, income, ownership, and tax-clearance rules.
Senior relief
Sussex County's over-65 exemption requires a primary-residence owner who is at least 65, has been a full-time Sussex County resident for at least five years, and has annual income no higher than $6,000 single or $7,500 married excluding specified Social Security/Railroad benefits. The 2025 county ordinance and current form provide a maximum $229,000 reduction from assessed value; all county taxes, fees, and sewer charges must be paid before the April 30 deadline.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →