North Plainfield Boro NJ property tax rate 2025: 4.543
North Plainfield Boro, Somerset County. 5,515 parcels in the MOD-IV 2026 file. Rate shown is tax year 2025 (latest available — not yet matched to assessment year).
Assessments are tax year 2026; latest published general rate we have is 2025. Estimate uses that rate until the 2026 rate is loaded.
North Plainfield Boro at a glance
5,515 parcels are on the 2026 file. The 2025 general rate is 4.543, and the prior rate on file is 4.358 for 2024. A typical class 2 assessment is $224,839. Usable sales with a 2025 deed: 136, median $497,500. The state construction file lists 1,854 permits here. The median class 2 house was built in 1949. 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 North Plainfield Boro bill
North Plainfield Boro’s general rate of 4.543 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 4.358 for 2024. School, county, and municipal shares of this rate are 49.5%, 13.5%, and 37.0%. The largest slice is schools. In Somerset County the middle school share for rate year 2025 is 58.5% in Somerville Boro. Class 2 net assessments changed from $1,081,408,600 to $1,081,643,500, 0.0%, on 4,539 parcels. Usable sales with a 2025 deed: median $497,500 (136 sales). The largest class share of net assessed value is Residential at 67.5%. State school aid is outside these bars.
Building permits in North Plainfield Boro
The New Jersey construction-permit file lists 1,854 permits in North Plainfield 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 North Plainfield Boro construction office.
2025 general tax rate in North Plainfield Boro: 4.543
This general rate is tax year 2025. The assessment file is 2026. It is not a 2026 bill.
In Somerset County, the median municipality’s school share (rate year 2025) is 58.5%; this town is 49.5%. 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 Somerset towns · How NJ taxes work.
The school percent is the local property-tax levy. The district for this municipality is North Plainfield Boro (K-12), FY2027 K–12 aid $69,692,886. Those aid figures are not slices of these bars. Somerset district table.
Prior year (2024) general rate: 4.358.
Tax on a $200,000 or $500,000 sale in North Plainfield Boro
These figures use North Plainfield 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 57.23% would be assessed at about $286,150. At the general rate of 4.543, the estimated tax is $13,000. A $200,000 sale at that same ratio and rate would be assessed at about $114,460, with an estimated tax of $5,200.
In Somerset County for 2025, the $500,000 bill runs from $5,800 in Far Hills Boro to $13,292 in So Bound Brook Boro. The middle bill is $9,373 in Hillsborough Twp. All Somerset towns.
See every New Jersey town on the same $200,000 and $500,000 sale for 2025.
Recent usable sales in North Plainfield Boro
These are the five newest usable deeds on the 2026 file for North Plainfield 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 |
|---|---|---|---|
| 277 WATCHUNG AVENUE | 1/6/2026 | $615,000 | $235,500 |
| 50 LINDEN AVE | 12/26/2025 | $238,500 | $104,000 |
| 190 COLUMBIA AVE | 12/23/2025 | $545,000 | $250,000 |
| 401 HIGHWAY 22 B52 U7 | 12/22/2025 | $185,000 | $70,000 |
| 74 MERCER AVENUE | 12/19/2025 | $730,000 | $280,000 |
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 North Plainfield Boro: $22,715
Residential
The highest residential estimate in North Plainfield Boro is $22,715 at 155 INTERHAVEN AVENUE, on a net assessment of $500,000 and a 2025 general rate of 4.543.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 155 INTERHAVEN AVENUE | 2 — Residential (four families or less) | $500,000 | 2025 | $22,715 |
| 153 INTERHAVEN AVENUE | 2 — Residential (four families or less) | $500,000 | 2025 | $22,715 |
| 31-33 MYRTLE AVENUE | 2 — Residential (four families or less) | $500,000 | 2025 | $22,715 |
| 179 MAPLE AVENUE | 2 — Residential (four families or less) | $500,000 | 2025 | $22,715 |
| 225 MAPLE AVENUE | 2 — Residential (four families or less) | $480,000 | 2025 | $21,806 |
Business
The highest business estimate in North Plainfield Boro is $863,170 at 1200 NJSH 22E, on a net assessment of $19,000,000 and a 2025 general rate of 4.543.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 1200 NJSH 22E | 4A — Commercial | $19,000,000 | 2025 | $863,170 |
| 1200 NJSH 22E | 4A — Commercial | $15,500,000 | 2025 | $704,165 |
| 825 NJSH 22W | 4A — Commercial | $14,000,000 | 2025 | $636,020 |
| 1099 NJSH 22W | 4A — Commercial | $10,850,000 | 2025 | $492,916 |
| 700 NJSH 22E | 4A — Commercial | $8,527,900 | 2025 | $387,422 |
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 North Plainfield Boro, typical class 2 assessment $224,839
Class 2 residential in the MOD-IV file: 4,940 parcels, average net assessment $224,839.
How assessments changed
Class 2 residential net assessments changed from $1,081,408,600 to $1,081,643,500, 0.0%, on 4,539 parcels that have both a prior net and a 2026 net. This is the assessment roll, not an appraisal.
Among 136 usable recorded sales whose latest deed on this file is in 2025, the median price is $497,500. 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 | 4,940 | $1,110,705,900 | 67.5% |
| Vacant land 1 | 275 | $142,100,000 | 8.6% |
| Commercial 4A | 262 | $230,234,350 | 14.0% |
| Industrial 4B | 2 | $1,120,000 | 0.1% |
| Apartment 4C | 35 | $160,276,208 | 9.7% |
| Other / unclassified other | 1 | $883,500 | 0.1% |
Housing stock in North Plainfield Boro, median year built 1949
On the 2026 file, class 2 houses in North Plainfield Boro with a year built have a median year of 1949, about 77 years old. Of those 4,910 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 89.6%, Vacant land 5.0%, Commercial 4.8%, Apartment 0.6%, Industrial <0.1%, Other / unclassified <0.1%. 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.