Mendham Twp NJ property tax rate 2025: 1.839 after reassessment
Mendham Twp, Morris County. 2,436 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.
Mendham Twp at a glance
2,436 parcels are on the 2026 file. The 2025 general rate is 1.839, and the prior rate on file is 1.942 for 2024. A typical class 2 assessment is $1,236,977. Usable sales with a 2025 deed: 57, median $1,426,000. The state construction file lists 3,605 permits here. The median class 2 house was built in 1974. 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 Mendham Twp bill
Mendham Twp’s general rate of 1.839 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 1.942 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 68.2%, 13.4%, and 18.4%. The largest slice is schools. In Morris County the middle school share for rate year 2025 is 62.9% in Netcong Boro. Class 2 net assessments changed from $2,230,410,200 to $2,450,450,600, up 9.9%, on 1,981 parcels. Usable sales with a 2025 deed: median $1,426,000 (57 sales). The largest class share of net assessed value is Residential at 84.4%. State school aid is outside these bars.
Building permits in Mendham Twp
The New Jersey construction-permit file lists 3,605 permits in Mendham Twp. 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 Mendham Twp construction office.
2025 general tax rate in Mendham Twp: 1.839
This general rate is tax year 2025. The assessment file is 2026. It is not a 2026 bill.
In Morris County, the median municipality’s school share (rate year 2025) is 62.9%; this town is 68.2%. 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 Morris towns · How NJ taxes work.
The school percent is the local property-tax levy. The district for this municipality is Mendham Twp (K-8 or K-6 local), FY2027 K–12 aid $1,513,052. The high school district is West Morris Regional, FY2027 K–12 aid $4,078,855. Those aid figures are not slices of these bars. Morris district table.
Prior year (2024) general rate: 1.942.
Tax on a $200,000 or $500,000 sale in Mendham Twp
These figures use Mendham Twp’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 89.87% would be assessed at about $449,350. At the general rate of 1.839, the estimated tax is $8,264. A $200,000 sale at that same ratio and rate would be assessed at about $179,740, with an estimated tax of $3,305.
In Morris County for 2025, the $500,000 bill runs from $4,917 in Harding Twp to $14,240 in Netcong Boro. The middle bill is $9,881 in Chester Boro. All Morris towns.
See every New Jersey town on the same $200,000 and $500,000 sale for 2025.
Recent usable sales in Mendham Twp
These are the five newest usable deeds on the 2026 file for Mendham Twp. 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 |
|---|---|---|---|
| 3 GOLF LN | 11/24/2025 | $1,848,000 | $1,672,100 |
| 12 GLENBROOK DR | 10/30/2025 | $1,150,000 | $1,159,500 |
| 3 BRIARWOOD LN | 10/10/2025 | $950,000 | $893,800 |
| 22 HILLTOP CIR | 9/19/2025 | $1,500,000 | $1,113,900 |
| 22 SADDLE HILL RD | 9/4/2025 | $1,350,000 | $1,223,700 |
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 Mendham Twp: $90,052
Residential
The highest residential estimate in Mendham Twp is $90,052 at 5 OSAGE LN, on a net assessment of $4,896,800 and a 2025 general rate of 1.839.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 5 OSAGE LN | 2 — Residential (four families or less) | $4,896,800 | 2025 | $90,052 |
| 4 RAINETREE RDG | 2 — Residential (four families or less) | $4,274,000 | 2025 | $78,599 |
| 23 COREY LN | 2 — Residential (four families or less) | $4,070,400 | 2025 | $74,855 |
| 3 BLACHLEY CIR | 2 — Residential (four families or less) | $4,052,000 | 2025 | $74,516 |
| 17 OLMSTED LN | 2 — Residential (four families or less) | $4,041,900 | 2025 | $74,331 |
Business
The highest business estimate in Mendham Twp is $157,146 at GOLF LN, on a net assessment of $8,545,200 and a 2025 general rate of 1.839.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| GOLF LN | 4A — Commercial | $8,545,200 | 2025 | $157,146 |
| 353 MENDHAM RD WEST | 4A — Commercial | $1,246,000 | 2025 | $22,914 |
| 12 COREY LN | 4A — Commercial | $1,171,800 | 2025 | $21,549 |
| 20 CONIFER DR | 4A — Commercial | $1,033,600 | 2025 | $19,008 |
| 161 MENDHAM RD EAST | 4A — Commercial | $884,500 | 2025 | $16,266 |
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 Mendham Twp, typical class 2 assessment $1,236,977
Class 2 residential in the MOD-IV file: 1,981 parcels, average net assessment $1,236,977.
How assessments changed
Class 2 residential net assessments changed from $2,230,410,200 to $2,450,450,600, up 9.9%, on 1,981 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 57 usable recorded sales whose latest deed on this file is in 2025, the median price is $1,426,000. 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 | 1,981 | $2,450,450,600 | 84.4% |
| Vacant land 1 | 175 | $217,825,300 | 7.5% |
| Commercial 4A | 8 | $14,299,200 | 0.5% |
| Industrial 4B | 1 | $3,500 | 0.0% |
| Apartment 4C | 1 | $13,347,400 | 0.5% |
| Farm (regular) 3A | 110 | $205,673,700 | 7.1% |
| Farm (qualified) 3B | 158 | $655,700 | 0.0% |
| Other / unclassified other | 2 | $0 | 0.0% |
Housing stock in Mendham Twp, median year built 1974
On the 2026 file, class 2 houses in Mendham Twp with a year built have a median year of 1974, about 52 years old. Of those 1,943 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 81.3%, Vacant land 7.2%, Farm (qualified) 6.5%, Farm (regular) 4.5%, Commercial 0.3%, Other / unclassified <0.1%, Industrial <0.1%, Apartment <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.