Dunellen Boro NJ property tax rate 2025: 2.448 after reassessment
Dunellen Boro, Middlesex County. 2,322 parcels in the MOD-IV 2026 file. Rate shown is tax year 2025 (latest available — not yet matched to assessment year).
2026 revaluation/reassessment town — 2026 general tax rate not in our warehouse yet. Showing 2025 rate against 2026 assessments; YoY % is withheld until the matching rate posts.
Dunellen Boro at a glance
2,322 parcels are on the 2026 file. The 2025 general rate is 2.448, and the prior rate on file is 2.508 for 2024. A typical class 2 assessment is $498,330. Usable sales with a 2025 deed: 65, median $500,000. The state construction file lists 806 permits here. The median class 2 house was built in 1933. A property page adds that parcel’s permits, flood zone, mapped flood elevation, and high and low ground. Owner names are not shown.
How to read a Dunellen Boro bill
Dunellen Boro’s general rate of 2.448 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 2.508 for 2024. This municipality is on the 2026 reassessment list, so the rate move is the roll being reset. It is not, by itself, the change in the bill. School, county, and municipal shares of this rate are 57.6%, 14.4%, and 27.9%. The largest slice is schools. In Middlesex County the middle school share for rate year 2025 is 54.6% in South Plainfield Boro. Class 2 net assessments changed from $891,556,400 to $962,772,800, up 8.0%, on 1,932 parcels. Usable sales with a 2025 deed: median $500,000 (65 sales). The largest class share of net assessed value is Residential at 76.3%. State school aid is outside these bars.
Building permits in Dunellen Boro
The New Jersey construction-permit file lists 806 permits in Dunellen Boro. This file is a full record from 2021 on. Older permits are mostly missing. Work from before then can be missing here and still be at the Dunellen Boro construction office.
2025 general tax rate in Dunellen Boro: 2.448
This general rate is tax year 2025. The assessment file is 2026. It is not a 2026 bill.
In Middlesex County, the median municipality’s school share (rate year 2025) is 54.6%; this town is 57.6%. The largest slice here is schools. State school aid is not in these bars — it reduces the school levy before the rate is struck. All Middlesex towns · How NJ taxes work.
The school percent is the local property-tax levy. The district for this municipality is Dunellen Boro (K-12), FY2027 K–12 aid $20,960,282. Those aid figures are not slices of these bars. Middlesex district table.
Prior year (2024) general rate: 2.508.
Tax on a $200,000 or $500,000 sale in Dunellen Boro
These figures use Dunellen Boro’s own ratio and general rate. How the same sale price is calculated for every town. This is not an appraisal and not a collector bill.
2025
A $500,000 sale at the 2025 ratio of 92.90% would be assessed at about $464,500. At the general rate of 2.448, the estimated tax is $11,371. A $200,000 sale at that same ratio and rate would be assessed at about $185,800, with an estimated tax of $4,548.
In Middlesex County for 2025, the $500,000 bill runs from $4,625 in Carteret Boro to $13,615 in Highland Park Boro. The middle bill is $10,575 in New Brunswick City. All Middlesex towns.
See every New Jersey town on the same $200,000 and $500,000 sale for 2025.
Recent usable sales in Dunellen Boro
These are the five newest usable deeds on the 2026 file for Dunellen Boro. A $1 deed and a non-usable SR1A sale are left out. Each parcel stores one sale, so this is not every deed recorded in town.
| Address | Deed date | Sale price | Net assessment |
|---|---|---|---|
| 323 OAK PARKWAY | 1/14/2026 | $480,000 | $474,600 |
| 314 MOUNTAINVIEW TERR | 1/6/2026 | $517,000 | $496,500 |
| 820 FRONT ST | 1/5/2026 | $375,000 | $425,000 |
| 709 FRONT ST | 12/22/2025 | $465,000 | $450,000 |
| 511 GROVE ST | 12/18/2025 | $615,000 | $605,800 |
Owner names are not shown. The rate year and the assessment file year differ, so this table does not print an estimated tax. This is not a collector’s bill.
Highest estimated tax in Dunellen Boro: $23,214
Residential
The highest residential estimate in Dunellen Boro is $23,214 at 579 MOUNTAINVIEW TERR, on a net assessment of $948,300 and a 2025 general rate of 2.448.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 579 MOUNTAINVIEW TERR | 2 — Residential (four families or less) | $948,300 | 2025 | $23,214 |
| 432 MOUNTAINVIEW TERR | 2 — Residential (four families or less) | $852,500 | 2025 | $20,869 |
| 563 MOUNTAINVIEW TERR | 2 — Residential (four families or less) | $850,000 | 2025 | $20,808 |
| 622 CENTER ST | 2 — Residential (four families or less) | $799,000 | 2025 | $19,560 |
| 262 PROSPECT AVE | 2 — Residential (four families or less) | $793,500 | 2025 | $19,425 |
Business
The highest business estimate in Dunellen Boro is $119,646 at 215 NORTH AVE, on a net assessment of $4,887,500 and a 2025 general rate of 2.448.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 215 NORTH AVE | 4A — Commercial | $4,887,500 | 2025 | $119,646 |
| 665 NORTH AVE | 4B — Industrial | $2,895,800 | 2025 | $70,889 |
| 2-16 SO WASHINGTON AVE | 4A — Commercial | $2,050,000 | 2025 | $50,184 |
| 431 NORTH AVE | 4A — Commercial | $1,881,000 | 2025 | $46,047 |
| 630 GROVE ST | 4A — Commercial | $1,857,300 | 2025 | $45,467 |
Owner names are not shown. Every parcel in this town uses the same rate, so the highest tax is the highest assessment. Commercial and industrial parcels (class 4A and 4B) are the business list. Apartment buildings are class 4C and are not in that list. This is not a collector’s bill.
Ratable base in Dunellen Boro, typical class 2 assessment $498,330
Class 2 residential in the MOD-IV file: 1,932 parcels, average net assessment $498,330.
How assessments changed
Class 2 residential net assessments changed from $891,556,400 to $962,772,800, up 8.0%, on 1,932 parcels that have both a prior net and a 2026 net. This is the reassessment roll. It is not the change in the tax bill.
Among 65 usable recorded sales whose latest deed on this file is in 2025, the median price is $500,000. A $1 deed and a non-usable SR1A sale are left out. Each parcel stores one sale, so this is not every deed recorded that year.
Share of net assessed value by property class (MOD-IV). Not a school-quality rating.
| Class | Parcels | Net assessed | % of net |
|---|---|---|---|
| Residential 2 | 1,932 | $962,772,800 | 76.3% |
| Vacant land 1 | 255 | $204,816,600 | 16.2% |
| Commercial 4A | 110 | $74,600,600 | 5.9% |
| Industrial 4B | 6 | $7,076,500 | 0.6% |
| Apartment 4C | 12 | $12,311,800 | 1.0% |
| Other / unclassified other | 7 | $0 | 0.0% |
Housing stock in Dunellen Boro, median year built 1933
On the 2026 file, class 2 houses in Dunellen Boro with a year built have a median year of 1933, about 93 years old. Of those 1,932 houses, the largest share was built Before 1940. This is the assessor’s year built. It is not a ranking of towns.
By parcel count, Residential 83.2%, Vacant land 11.0%, Commercial 4.7%, Apartment 0.5%, Other / unclassified 0.3%, Industrial 0.3%. Those percentages are a count of parcels, not a share of tax dollars. The class table uses the tax-base share.
Year built
Assessor building line
Grouped from the assessor’s building abbreviation. One-family, two-family, and condo are the codes that read clearly. Other codes stay in their own group. This is not a bedroom count, and square feet are left off because most records do not include them.