Alpha Boro NJ property tax rate 2025: 3.485
Alpha Boro, Warren County. 1,104 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.
Alpha Boro at a glance
1,104 parcels are on the 2026 file. The 2025 general rate is 3.485, and the prior rate on file is 3.644 for 2024. A typical class 2 assessment is $183,986. Usable sales with a 2022 deed: 34, median $260,629. The state construction file lists 78 permits here. The median class 2 house was built in 1950. 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 Alpha Boro bill
Alpha Boro’s general rate of 3.485 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 3.644 for 2024. School, county, and municipal shares of this rate are 50.3%, 21.8%, and 27.9%. The largest slice is schools. In Warren County the middle school share for rate year 2025 is 58.2% in Hardwick Twp. Class 2 net assessments changed from $147,279,600 to $147,556,700, up 0.2%, on 802 parcels. Usable sales with a 2022 deed: median $260,629 (34 sales). The largest class share of net assessed value is Residential at 54.5%. State school aid is outside these bars.
Building permits in Alpha Boro
The New Jersey construction-permit file lists 78 permits in Alpha 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 Alpha Boro construction office.
2025 general tax rate in Alpha Boro: 3.485
This general rate is tax year 2025. The assessment file is 2026. It is not a 2026 bill.
In Warren County, the median municipality’s school share (rate year 2025) is 58.2%; this town is 50.3%. 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 Warren towns · How NJ taxes work.
The school percent is the local property-tax levy. The district for this municipality is Alpha Boro (K-12), FY2027 K–12 aid $2,619,765. Those aid figures are not slices of these bars. Warren district table.
Prior year (2024) general rate: 3.644.
Tax on a $200,000 or $500,000 sale in Alpha Boro
These figures use Alpha 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 68.96% would be assessed at about $344,800. At the general rate of 3.485, the estimated tax is $12,016. A $200,000 sale at that same ratio and rate would be assessed at about $137,920, with an estimated tax of $4,807.
In Warren County for 2025, the $500,000 bill runs from $7,996 in Harmony Twp to $15,027 in Pohatcong Twp. The middle bill is $12,016 in Alpha Boro. All Warren towns.
See every New Jersey town on the same $200,000 and $500,000 sale for 2025.
Recent usable sales in Alpha Boro
These are the five newest usable deeds on the 2026 file for Alpha 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 |
|---|---|---|---|
| 737 NORTH BOULEVARD | 9/27/2025 | $250,000 | $116,300 |
| 205 SOMERSET STREET | 9/25/2025 | $310,000 | $156,800 |
| 1625 SPRINGTOWN ROAD | 9/18/2025 | $250,000 | $84,700 |
| 909 NEW BRUNSWICK AVENUE | 9/17/2025 | $435,000 | $335,000 |
| 825 SAMPSON AVENUE | 9/15/2025 | $250,000 | $216,900 |
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 Alpha Boro: $14,236
Residential
The highest residential estimate in Alpha Boro is $14,236 at 245 WILLIAMS STREET, on a net assessment of $408,500 and a 2025 general rate of 3.485.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 245 WILLIAMS STREET | 2 — Residential (four families or less) | $408,500 | 2025 | $14,236 |
| 950 DEWEY AVENUE | 2 — Residential (four families or less) | $350,100 | 2025 | $12,201 |
| 822 WEST CENTRAL AVENUE | 2 — Residential (four families or less) | $344,800 | 2025 | $12,016 |
| 1518 WARREN STREET | 2 — Residential (four families or less) | $339,500 | 2025 | $11,832 |
| 135 FIFTH AVENUE | 2 — Residential (four families or less) | $339,300 | 2025 | $11,825 |
Business
The highest business estimate in Alpha Boro is $324,105 at 95 INDUSTRIAL DRIVE, on a net assessment of $9,300,000 and a 2025 general rate of 3.485.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 95 INDUSTRIAL DRIVE | 4A — Commercial | $9,300,000 | 2025 | $324,105 |
| 85 INDUSTRIAL DRIVE | 4A — Commercial | $8,283,300 | 2025 | $288,673 |
| 50 INDUSTRIAL DRIVE | 4B — Industrial | $4,999,700 | 2025 | $174,240 |
| 81 INDUSTRIAL DRIVE | 4B — Industrial | $4,356,700 | 2025 | $151,831 |
| 75 INDUSTRIAL DRIVE | 4B — Industrial | $3,227,900 | 2025 | $112,492 |
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 Alpha Boro, typical class 2 assessment $183,986
Class 2 residential in the MOD-IV file: 802 parcels, average net assessment $183,986.
How assessments changed
Class 2 residential net assessments changed from $147,279,600 to $147,556,700, up 0.2%, on 802 parcels that have both a prior net and a 2026 net. This is the assessment roll, not an appraisal.
Among 34 usable recorded sales whose latest deed on this file is in 2022, the median price is $260,629. 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 | 802 | $147,556,700 | 54.5% |
| Vacant land 1 | 212 | $56,738,800 | 21.0% |
| Commercial 4A | 52 | $37,038,800 | 13.7% |
| Industrial 4B | 16 | $21,702,200 | 8.0% |
| Apartment 4C | 9 | $6,672,300 | 2.5% |
| Farm (regular) 3A | 2 | $692,200 | 0.3% |
| Farm (qualified) 3B | 6 | $172,800 | 0.1% |
| Other / unclassified other | 5 | $63,463 | 0.0% |
Housing stock in Alpha Boro, median year built 1950
On the 2026 file, class 2 houses in Alpha Boro with a year built have a median year of 1950, about 76 years old. Of those 798 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 72.6%, Vacant land 19.2%, Commercial 4.7%, Industrial 1.4%, Apartment 0.8%, Farm (qualified) 0.5%, Other / unclassified 0.5%, Farm (regular) 0.2%. 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.