Sussex County is part of Delaware's three-county property tax system, which has been operating under historic transition since the 2020 Court of Chancery ruling and the 2024-2025 reassessment. Delaware now assesses real property at 100% of full and fair market value statewide (post-reassessment). Tax = AV × (county rate + school district rate + municipal rate) / 100. Delaware uses a dollars-per-$100 convention. Sussex County effective property tax rate is approximately 0.45%. Delaware effective rates run ~0.53% statewide median — among the LOWEST in the United States. Delaware has only 3 counties (New Castle, Kent, Sussex), all of which assess. Delaware has NO state property tax (only county + school district + municipal). The school district rate is the LARGEST component (~70-80% of total bill).
How the bill is built
Each county's assessment office determines FMV; all three DE counties now use 100% AR post the 2024-2025 reassessment. Tax = FMV × (county rate + school district rate + municipal rate where applicable) / 100. Sussex's representative combined rate is ~5 mills (~0.45% effective). Senior School Property Tax Credit (50% of school tax, capped $400/year) for 65+ with 10-yr DE residency and HHI ≤ $50K/$100K. Disabled Veterans School Property Tax Credit (100% of non-vocational school tax) for 100% P&T or IU disabled with 3-yr DE residency. School district is the LARGEST component (~70-80% of bill).
Delaware just completed its first reassessment in 30-50 years. Pre-2024, DE counties used dramatically out-of-date base years: New Castle 1983, Kent 1987, Sussex 1974. After the 2020 Court of Chancery ruling (Delawareans for Educational Opportunity v. Carney) found this violated the Uniformity Clause, all three counties contracted with Tyler Technologies. Kent reassessed for TY2024, New Castle and Sussex for TY2025. Some Sussex waterfront saw 400-500% tax increases. State law now requires reassessment every 5 years (next ~2030).
Delaware corporate law subsidizes residential property tax. ~68% of Fortune 500 companies and ~80% of US IPOs incorporate in Delaware, generating ~$1.4B annual state revenue from incorporation fees + franchise taxes (~25-30% of total state revenue). This is why DE can maintain low residential property tax + no state sales tax. Corporate fees + graduated income tax (max 6.6%) carry substantial revenue load.
2026 Sussex County rate breakdown (county + school district + municipal rate per $1,000 of AV (100% full-and-fair-market-value post-2024-2025 reassessment; school district is largest component ~70-80% of bill), Georgetown district)
| Taxing entity | Rate |
|---|
| Sussex County rate ~$0.0445/$100 (residential, post-reassessment 2025; rolled back from pre-reassessment $0.4450/$100 due to substantially higher AV bases under new 100% AR) + school district rate $0.30-$1.20/$100 (varies by district: Indian River, Cape Henlopen, Sussex Tech, Seaford, Laurel, Woodbridge, Milford, Delmar) + municipal rate where applicable (Rehoboth Beach ~$0.4900/$100; Lewes ~$0.6500/$100; Bethany Beach ~$0.3500/$100; Georgetown ~$0.2700/$100; Seaford ~$0.7200/$100) × 100% AR; county avg ~0.45% effective post-reassessment with dramatic stratification (oceanfront properties saw 400-500% increases due to decades-old 1974 assessment base year) | 4.5000 |
| Combined total | 4.5000 |
As of April 27, 2026 · From Sussex County Department of Finance / Assessment Office.
Note: Sussex County is **southern Delaware + the Atlantic beach destinations** — the fastest-growing county in Delaware (~30% population growth 2010-2020, driven by NJ/NY/PA retiree migration to lower-cost coastal Delaware). The county is anchored by **Georgetown** (~7K — Sussex County seat, 1791-founded as geographic center of Sussex County by 1791 General Assembly determination + annual **"Return Day"** the 1791-tradition where political opponents 2 days after November election bury the "hatchet" + read election results from **Old Sussex County Courthouse** balcony + **literally bury a hatchet** in sand on **The Circle** town center), **Rehoboth Beach** (~1.5K year-round, ~30,000+ summer — as the **"Nation's Summer Capital"** mid-Atlantic beach destination + **Boardwalk** the 1873-built mile-long wooden boardwalk + **Funland** the 1939-founded family-owned boardwalk amusement park + **Dolle's Salt Water Taffy** the 1926-founded American salt water taffy retail + **Joe Biden's 2017-purchased $2.7M Rehoboth Beach vacation home** at North Shores + 4-block Rehoboth Avenue commercial district drawing 100,000+ daily summer visitors), **Lewes** (~3K — **the first town in Delaware** founded **1631** by **Dutch West India Company** as **Zwaanendael** "**Valley of the Swans**" — **first European settlement in Delaware** + 1632 Dutch massacre by Lenape natives + 1659 Dutch resettlement + 1664 English capture + **Zwaanendael Museum** 1931-built Dutch Renaissance replica + **Cape Henlopen State Park** 5,000-acre Atlantic-coast state park + **Cape May-Lewes Ferry** 1964-opened 17-mile 80-minute cross-Delaware Bay ferry to Cape May NJ), **Bethany Beach** (~1K year-round, ~15,000+ summer — as part of **"Quiet Resorts"** southern Delaware coastal communities), **Seaford** (~7K — **"Nylon Capital of the World"** + **DuPont Seaford Plant** the **1939-1940 world's first commercial nylon production facility** American 20th-century synthetic-fiber industrial heritage), **Milton** (~3K — home of **Dogfish Head Brewery** the 1995-founded American craft beer brewery + annual 100,000+ Milton-area brewery tourism), **Millsboro** (~5K), **Selbyville** (~2K), **Frankford** (~1K), and several smaller coastal + inland towns. Major employment includes substantial coastal tourism + hospitality (Rehoboth/Lewes/Bethany draw ~5+ million annual summer visitors), **Beebe Healthcare** (the 1916-founded regional hospital ~3,000 employees), **Mountaire Farms** (the American poultry processor Sussex County operations ~5,000 employees), **Perdue Farms** (the 1920-founded American poultry processor Sussex operations), substantial agriculture (Sussex is the **#1 broiler chicken-producing US county by value**), and **Dogfish Head**.
Note: Sussex County effective property tax rates run approximately **0.45%** post-2025 reassessment — moderate-low by US standards but **dramatically restructured** by the **2025 reassessment**. The 2025 reassessment was the **first Sussex County reassessment since 1974** — **51 years of frozen assessment values**. Pre-reassessment, Sussex used 50% of 1974 values for tax rate calculations + $0.4450/$100 rate. Post-reassessment, Sussex now uses 100% of 2024 full and fair cash value + $0.0445/$100 rate. **Some Sussex County properties saw 400-500% tax increases** due to the decades-old assessment base — waterfront/oceanfront properties were **dramatically undervalued** for decades (a $1.97 million Rehoboth oceanfront home saw a **400% tax increase** from $830 to $4,151; a $3.46 million Lewes Bay home saw a **532% increase** from $1,079 to $6,822). School district rates vary substantially: **Indian River** + **Cape Henlopen** + **Sussex Tech** + **Seaford** + **Laurel** + **Woodbridge** + **Milford** + **Delmar** (the 8 Sussex school districts, more than NCC or Kent) each set their own rates, typically $0.30-$1.20/$100 of AV residential post-reassessment. Median home values around $397,800 (highest in Delaware due to coastal premium) combined with the ~0.45% county-average effective rate produce median annual bills around $1,790.
Note: For relocation buyers: Sussex County offers **the premier Delaware Atlantic-coastal + Joe Biden vacation + nylon heritage + Dogfish Head** option — the **Rehoboth Beach + Lewes + Bethany Beach + Dewey Beach + Fenwick Island** coastal communities + **35+ miles of Delaware Atlantic coast**, the **Cape Henlopen State Park** 5,000-acre coastal park, the **Cape May-Lewes Ferry** cross-Delaware Bay transportation, the **Lewes "First Town in Delaware" 1631-founded heritage**, the **Dogfish Head Brewery** in Milton + brewery tour tourism, the **Joe Biden North Shores Rehoboth vacation home** + 2017-2025 Secret Service activity post-Presidential continued weekend visits, and reasonable Wilmington (Rehoboth to Wilmington ~80 mi via DE-1, ~2 hours), Philadelphia (~125 mi, ~2.5 hours), and Baltimore (~115 mi, ~2.5 hours) reach. The trade-off: aggressive coastal housing prices (Rehoboth Beach median $850K+, oceanfront $2-5M+, North Shores Biden-era $1.5M+, Lewes waterfront $850K+, Bethany oceanfront $2M+), substantial seasonal/tourism population variation (Rehoboth swings from ~1.5K winter to ~30K+ summer + ~5+ million annual total summer visitors statewide), substantial 2025 reassessment tax-bill shock for waterfront property owners (some tax bills increased 400-500%), and distance from major Mid-Atlantic employment centers (Rehoboth to Wilmington 80 mi, to Baltimore 115 mi, to Washington DC 130 mi).
Deductions and exemptions for 2026
Delaware homeowner property tax relief operates through state-level credits + county-level senior exemptions. Delaware has NO statewide homestead exemption, NO senior valuation freeze, NO Save-Our-Homes-style cap. The primary relief mechanisms are: (1) the Senior School Property Tax Credit (50% of school tax capped at $400/year for 65+ with HHI ≤ $50K/$100K and 10-year DE residency), (2) the Disabled Veterans School Property Tax Credit (100% of non-vocational school tax for 100% P&T VA disability or 100% IU with 3-year DE residency), and (3) county-level Senior Citizen Exemption (NCC provides $173K AV reduction for 65+/100% disabled vet with 10-year DE residency, AV ≤ $676K, income-tested; Kent and Sussex have similar but lower programs).
Senior School Property Tax Credit (Title 14 §1917)
50% credit against school district property tax (the largest component of DE bills, ~70-80% of total), capped at $400/year for new applicants since 2017 (grandfathered participants who had 3-year residency before 2017 retained $500/year cap until 2017 changes). Eligibility: age 65+, 10-year Delaware residency required for new applicants since 2017, household income at or below $50,000 single / $100,000 joint. Apply with county tax office; one-time application; do not need to re-apply each year. Cannot stack with Disabled Veterans School Property Tax Credit (one or the other). The credit is administered through county tax bills — the credit is deducted from your school tax portion before the bill is mailed.
Disabled Veterans School Property Tax Credit (HB 214 of 2021)
100% credit against non-vocational school district property tax for veterans with 100% P&T VA disability OR 100% individual unemployability rating. 3-year DE residency required. Primary residence only. Apply by April 30 with county tax office. Submit VA disability award letter + DD-214 + DE driver's license + Social Security card + application form. One-time application. Reimbursed to school district from State General Fund. Cannot stack with Senior School Property Tax Credit. Surviving spouses do NOT qualify after the qualifying veteran's death. Combined with DE's low effective rates (~0.5% statewide median), the school credit saves $1,500-$3,500/year for qualifying 100% disabled vets.
County-level Senior Citizen Exemption (varies by county)
Each county provides additional senior + 100% disabled vet relief at the county level (NOT statewide uniform). New Castle County provides $173,000 AV reduction for homeowners 65+ or 100% disabled vet with 10-year DE residency, AV ≤ $676,000, income limits, and 12-month primary-residence requirement. Kent County provides similar but lower-cap program. Sussex County provides similar but lower-cap program. Apply with county tax office; income-tested; annual or one-time depending on county. Stacks with state-level credits.
Appealing your assessment
Delaware property tax appeals follow a 3-tier process. Level 1: County Board of Assessment Review. File written appeal with county tax office. New Castle deadline March 1; Kent and Sussex similar deadlines (typically March or April). The Board must hold a hearing and present evidence. Level 2: County Department of Finance / Levy Court. Appeal within 30 days of Board decision (varies by county). Level 3: Delaware Superior Court. Appeal within 30 days of county-level final decision. Legal arguments about uniformity and equal protection have been increasingly successful in DE courts following the 2020 Chancery ruling — though now that all three counties are at 100% AR post-reassessment, uniformity arguments are substantially harder. Most appeals are resolved at Level 1 (over 5,200 appeals filed in NCC alone after the 2025 reassessment).