Millstone Boro NJ property tax rate 2025: 2.154 after reassessment
Millstone Boro, Somerset County. 209 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.
Millstone Boro at a glance
209 parcels are on the 2026 file. The 2025 general rate is 2.154, and the prior rate on file is 1.830 for 2024. A typical class 2 assessment is $473,066. Usable sales with a 2025 deed: 3, median $600,000. The state construction file lists 119 permits here. The median class 2 house was built in 1956. 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 Millstone Boro bill
Millstone Boro’s general rate of 2.154 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 1.830 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 56.3%, 17.2%, and 26.5%. 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 $62,749,900 to $72,379,100, up 15.3%, on 153 parcels. Usable sales with a 2025 deed: median $600,000 (3 sales). The largest class share of net assessed value is Residential at 75.7%. State school aid is outside these bars.
Building permits in Millstone Boro
The New Jersey construction-permit file lists 119 permits in Millstone 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 Millstone Boro construction office.
2025 general tax rate in Millstone Boro: 2.154
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 56.3%. 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 Somerset towns · How NJ taxes work.
The school percent is the local property-tax levy. The district for this municipality is Hillsborough Twp (K-12), FY2027 K–12 aid $16,858,333. Those aid figures are not slices of these bars. Somerset district table.
Prior year (2024) general rate: 1.830.
Tax on a $200,000 or $500,000 sale in Millstone Boro
These figures use Millstone 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 86.75% would be assessed at about $433,750. At the general rate of 2.154, the estimated tax is $9,343. A $200,000 sale at that same ratio and rate would be assessed at about $173,500, with an estimated tax of $3,737.
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 Millstone Boro
These are the five newest usable deeds on the 2026 file for Millstone 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 |
|---|---|---|---|
| 75 AMWELL ROAD | 9/15/2025 | $480,000 | $403,800 |
| 1516 MAIN STREET | 7/25/2025 | $600,000 | $510,100 |
| 1404 MAIN STREET | 4/11/2025 | $730,000 | $656,500 |
| 215 ANN ST. | 6/7/2024 | $467,500 | $494,400 |
| MAIN STREET | 2/21/2024 | $487,000 | $537,400 |
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 Millstone Boro: $16,472
Residential
The highest residential estimate in Millstone Boro is $16,472 at 42 AMWELL ROAD, on a net assessment of $764,700 and a 2025 general rate of 2.154.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 42 AMWELL ROAD | 2 — Residential (four families or less) | $764,700 | 2025 | $16,472 |
| 22 BEARDSLEE ROAD | 2 — Residential (four families or less) | $746,200 | 2025 | $16,073 |
| 10 YORKTOWN ROAD | 2 — Residential (four families or less) | $710,900 | 2025 | $15,313 |
| 128 AMWELL RD | 2 — Residential (four families or less) | $696,900 | 2025 | $15,011 |
| 39 AMWELL ROAD | 2 — Residential (four families or less) | $668,200 | 2025 | $14,393 |
Business
The highest business estimate in Millstone Boro is $15,502 at MAIN STREET, on a net assessment of $719,700 and a 2025 general rate of 2.154.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| MAIN STREET | 4A — Commercial | $719,700 | 2025 | $15,502 |
| MAIN STREET | 4A — Commercial | $697,600 | 2025 | $15,026 |
| 1393 MAIN STREET | 4A — Commercial | $587,100 | 2025 | $12,646 |
| 1377 MAIN STREET | 4A — Commercial | $513,500 | 2025 | $11,061 |
| 1370 MAIN ST. | 4A — Commercial | $411,100 | 2025 | $8,855 |
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 Millstone Boro, typical class 2 assessment $473,066
Class 2 residential in the MOD-IV file: 153 parcels, average net assessment $473,066.
How assessments changed
Class 2 residential net assessments changed from $62,749,900 to $72,379,100, up 15.3%, on 153 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 3 usable recorded sales whose latest deed on this file is in 2025, the median price is $600,000. 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 | 153 | $72,379,100 | 75.7% |
| Vacant land 1 | 45 | $18,855,500 | 19.7% |
| Commercial 4A | 9 | $4,440,400 | 4.6% |
| Other / unclassified other | 2 | $0 | 0.0% |
Housing stock in Millstone Boro, median year built 1956
On the 2026 file, class 2 houses in Millstone Boro with a year built have a median year of 1956, about 70 years old. Of those 145 houses, the largest share was built 1960–1979. This is the assessor’s year built. It is not a ranking of towns.
By parcel count, Residential 73.2%, Vacant land 21.5%, Commercial 4.3%, Other / unclassified 1.0%. 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.