New Castle County, Delaware Property Taxes
Property Taxes in New Castle County, Delaware
Median New Castle County effective property tax rate: 0.80%, significantly lower than the national median of 1.02%.
Median New Castle County home value: $290,430
Median annual New Castle County tax bill: $2,329, $71 lower than the national median property tax bill of $2,400.
How are property taxes in New Castle County calculated?
Property taxes in New Castle County are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in New Castle County or another part of New Castle County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
New Castle County, Delaware Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.8%
Estimate Property Tax Bill
$2,323
$2,156
How Does the New Castle County Property Tax Calculator Work?
Use this New Castle County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies New Castle County's median effective tax rate of 0.80% to generate your estimate.
Enter your property's estimated assessed value — the figure the appraisal district assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts or improvement districts that apply to your property. New Castle County's median property tax rate is lower than the national median property tax rate of 1.02%, and the county's median property tax bill is $2,329, compared with the national median property tax bill of $2,400.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across New Castle County.
Property Tax Rates Across New Castle County, Delaware
What Are Effective Property Tax Rates Across New Castle County?
Local government entities set tax rates, which vary widely across New Castle County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare New Castle County's effective property tax rate to other counties in Delaware or the U.S. median of 1.02%.
New Castle County's median effective rate stands at 0.80%, which is lower than the national median of 1.02%. Within New Castle County, the highest rate is found in MONTCHANIN at 2.05%, while CLAYTON has the lowest at 0.53%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective New Castle County Tax Rate
0.80%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Delaware Tax Rate
1.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across New Castle County, Delaware
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bear | 0.54% | 0.70% | 0.83% | 0.98% | 1.15% |
| Bellefonte | 0.39% | 0.55% | 0.66% | 0.80% | 1.03% |
| Christiana | 0.59% | 0.83% | 0.93% | 1.07% | 1.27% |
| Claymont | 0.49% | 0.65% | 0.76% | 0.89% | 1.95% |
| Clayton | 0.15% | 0.34% | 0.53% | 0.78% | 1.40% |
| Edgemoor | 0.58% | 0.64% | 0.78% | 0.92% | 1.02% |
| Elsmere | 0.38% | 0.57% | 0.67% | 0.79% | 0.94% |
| Historic New Castle | 0.29% | 0.43% | 0.58% | 0.95% | 2.87% |
| Hockessin | 0.66% | 0.79% | 0.89% | 1.00% | 1.14% |
| Marshallton | 0.29% | 0.46% | 0.61% | 0.67% | 0.85% |
| Middletown | 0.58% | 0.71% | 0.81% | 0.92% | 1.06% |
| Montchanin | 0.69% | 0.95% | 2.05% | 3.69% | 3.69% |
| Newark | 0.57% | 0.75% | 0.88% | 1.01% | 1.17% |
| New Castle | 0.31% | 0.54% | 0.67% | 0.79% | 0.96% |
| Newport | 0.31% | 0.53% | 0.72% | 0.82% | 1.04% |
| Odessa | 0.26% | 0.39% | 0.58% | 0.90% | 1.84% |
| Port Penn | 0.11% | 0.25% | 0.35% | 0.53% | 0.86% |
| Rockland | 0.74% | 0.91% | 1.19% | 1.53% | 3.70% |
| Saint Georges | 0.25% | 0.40% | 0.57% | 0.85% | 3.33% |
| Smyrna | 0.19% | 0.38% | 0.55% | 0.76% | 1.39% |
| Talleyville | 0.55% | 0.64% | 0.71% | 0.81% | 0.88% |
| Townsend | 0.44% | 0.76% | 0.90% | 1.05% | 1.48% |
| Wilmington | 0.44% | 0.63% | 0.78% | 1.00% | 3.12% |
| Yorklyn | 0.47% | 0.61% | 1.05% | 3.07% | 3.69% |
| Delaware City | N/A | N/A | N/A | N/A | N/A |
| Greenville | N/A | N/A | N/A | N/A | N/A |
| Hst Newcastle | N/A | N/A | N/A | N/A | N/A |
| Kirkwood | N/A | N/A | N/A | N/A | N/A |
| Warwick | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across New Castle County, Delaware
When examining property taxes in New Castle County, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The New Castle County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In New Castle County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in New Castle County.
For example, the median tax bill in New Castle County is $2,329, with tax bills ranging significantly across the county. Montchanin has the highest median home price at $778,500.
Property Tax Assessment Values Across New Castle County, Delaware
Source: Ownwell
$99,090
$472,410
$845,730
Median New Castle County Market Value
$290,430
Median Delaware Market Value
$66,000
Median United States Market Value
$235,294
Property Tax Assessment Values Across New Castle County, Delaware
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bear | $89,200 | $238,680 | $338,040 | $443,790 | $531,630 |
| Bellefonte | $200,313 | $227,678 | $284,715 | $322,222 | $382,032 |
| Christiana | $54,320 | $225,090 | $427,950 | $454,140 | $519,156 |
| Claymont | $67,158 | $201,960 | $265,230 | $303,210 | $338,634 |
| Clayton | $124,800 | $222,728 | $297,450 | $366,930 | $421,443 |
| Edgemoor | $215,208 | $243,540 | $266,040 | $299,542 | $370,206 |
| Elsmere | $132,201 | $161,910 | $187,920 | $220,838 | $253,971 |
| Historic New Castle | $40,490 | $123,862 | $225,135 | $288,225 | $361,917 |
| Hockessin | $298,674 | $397,350 | $510,795 | $614,700 | $757,494 |
| Marshallton | $177,174 | $224,190 | $266,130 | $365,085 | $429,534 |
| Middletown | $129,699 | $313,830 | $438,660 | $535,680 | $612,891 |
| Montchanin | $170,280 | $356,000 | $778,500 | $1,108,440 | $1,705,788 |
| Newark | $161,460 | $230,670 | $293,400 | $394,718 | $526,590 |
| New Castle | $128,250 | $184,680 | $231,480 | $302,400 | $366,480 |
| Newport | $162,405 | $216,158 | $245,295 | $275,175 | $295,020 |
| Odessa | $53,750 | $225,000 | $320,175 | $399,578 | $546,750 |
| Port Penn | $13,200 | $171,090 | $227,340 | $247,500 | $264,924 |
| Rockland | $155,150 | $473,602 | $638,190 | $791,032 | $888,705 |
| Saint Georges | $43,800 | $202,320 | $246,060 | $277,830 | $342,486 |
| Smyrna | $132,360 | $231,650 | $327,330 | $395,145 | $468,000 |
| Talleyville | $262,908 | $305,415 | $342,630 | $388,080 | $432,828 |
| Townsend | $119,340 | $264,600 | $362,970 | $456,075 | $525,510 |
| Wilmington | $48,964 | $133,020 | $256,860 | $382,050 | $524,610 |
| Yorklyn | $20,020 | $80,800 | $213,500 | $431,000 | $1,255,932 |
| Delaware City | N/A | N/A | N/A | N/A | N/A |
| Greenville | N/A | N/A | N/A | N/A | N/A |
| Hst Newcastle | N/A | N/A | N/A | N/A | N/A |
| Kirkwood | N/A | N/A | N/A | N/A | N/A |
| Warwick | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across New Castle County, Delaware
Property tax bills in New Castle County are based on the assessed value of a home and the local tax rate applied to that value. The county considers the property’s market value, then uses the assessment to calculate the annual bill. For many homeowners, this means the amount owed can change when home values rise or when assessments are updated.
The typical home price in the county is $290,430, and property tax bills vary widely across the area. The 25th percentile tax bill is $1,493, while the 75th percentile is $3,474 and the 90th percentile is $4,817. That spread shows how much location and property characteristics can affect what homeowners pay.
Some homeowners may pay far less or far more than the county median depending on their property’s assessed value. In Montchanin, the highest median tax bill reaches $12,947, while Port Penn has a lowest median tax bill of $783.
Median New Castle County Tax Bill
$2,329
Median Delaware Tax Bill
$1,454
Median United States Tax Bill
$2,400
Property Tax Bills Across New Castle County, Delaware
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bear | $901 | $2,197 | $2,835 | $3,613 | $4,305 |
| Bellefonte | $1,194 | $1,603 | $1,954 | $2,168 | $2,521 |
| Christiana | $1,277 | $1,855 | $3,916 | $4,934 | $5,164 |
| Claymont | $916 | $1,565 | $1,972 | $2,291 | $2,697 |
| Clayton | $436 | $999 | $1,466 | $2,060 | $2,866 |
| Edgemoor | $1,386 | $1,780 | $2,061 | $2,350 | $3,108 |
| Elsmere | $852 | $1,168 | $1,269 | $1,369 | $1,640 |
| Historic New Castle | $596 | $968 | $1,274 | $1,665 | $2,251 |
| Hockessin | $2,636 | $3,445 | $4,685 | $5,701 | $7,008 |
| Marshallton | $521 | $1,201 | $1,613 | $2,314 | $3,033 |
| Middletown | $1,573 | $2,587 | $3,621 | $4,440 | $5,248 |
| Montchanin | $3,365 | $8,325 | $12,947 | $19,963 | $28,071 |
| Newark | $1,393 | $1,950 | $2,518 | $3,550 | $4,976 |
| New Castle | $601 | $1,128 | $1,552 | $2,079 | $2,717 |
| Newport | $835 | $1,251 | $1,703 | $2,037 | $2,296 |
| Odessa | $743 | $1,154 | $1,697 | $2,915 | $3,672 |
| Port Penn | $145 | $432 | $783 | $1,076 | $1,634 |
| Rockland | $4,294 | $6,904 | $7,794 | $8,475 | $10,144 |
| Saint Georges | $588 | $840 | $1,333 | $1,843 | $2,619 |
| Smyrna | $530 | $1,115 | $1,780 | $2,444 | $3,256 |
| Talleyville | $1,893 | $2,208 | $2,424 | $2,698 | $3,102 |
| Townsend | $1,155 | $2,331 | $3,414 | $4,148 | $5,043 |
| Wilmington | $680 | $1,225 | $2,010 | $3,020 | $4,515 |
| Yorklyn | $1,871 | $2,423 | $3,047 | $5,250 | $14,526 |
| Delaware City | N/A | N/A | N/A | N/A | N/A |
| Greenville | N/A | N/A | N/A | N/A | N/A |
| Hst Newcastle | N/A | N/A | N/A | N/A | N/A |
| Kirkwood | N/A | N/A | N/A | N/A | N/A |
| Warwick | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | March 14 |
Links | |
|---|---|
| New Castle Tax Assessor | |
| Website | www3.newcastlede.gov |