Mendham Boro NJ property tax rate 2025: 2.526
Mendham Boro, Morris County. 1,932 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.
Mendham Boro at a glance
1,932 parcels are on the 2026 file. The 2025 general rate is 2.526, and the prior rate on file is 2.460 for 2024. A typical class 2 assessment is $672,415. Usable sales with a 2025 deed: 57, median $831,500. The state construction file lists 2,397 permits here. The median class 2 house was built in 1971. 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 Boro bill
Mendham Boro’s general rate of 2.526 is tax year 2025 on the 2026 assessment file. It is not a 2026 bill. The prior general rate on file is 2.460 for 2024. School, county, and municipal shares of this rate are 65.8%, 12.0%, and 22.2%. 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 $1,083,775,500 to $1,086,623,100, up 0.3%, on 1,616 parcels. Usable sales with a 2025 deed: median $831,500 (57 sales). The largest class share of net assessed value is Residential at 77.8%. State school aid is outside these bars.
Building permits in Mendham Boro
The New Jersey construction-permit file lists 2,397 permits in Mendham 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 Mendham Boro construction office.
2025 general tax rate in Mendham Boro: 2.526
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 65.8%. 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 Boro (K-8 or K-6 local), FY2027 K–12 aid $591,434. 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: 2.460.
Tax on a $200,000 or $500,000 sale in Mendham Boro
These figures use Mendham 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 78.84% would be assessed at about $394,200. At the general rate of 2.526, the estimated tax is $9,957. A $200,000 sale at that same ratio and rate would be assessed at about $157,680, with an estimated tax of $3,983.
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 Boro
These are the five newest usable deeds on the 2026 file for Mendham 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 |
|---|---|---|---|
| 54 PEMBROKE DR | 12/26/2025 | $480,000 | $279,600 |
| 77 HAMPSHIRE DR | 12/22/2025 | $500,000 | $306,400 |
| 2 PEACOCK LN | 11/26/2025 | $775,000 | $505,100 |
| 23 ABERDEEN DR SOUTH | 11/24/2025 | $700,000 | $323,900 |
| 17 VALLEY WAY | 11/21/2025 | $995,000 | $665,300 |
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 Boro: $216,349
Residential
The highest residential estimate in Mendham Boro is $216,349 at 480 BERNARDSVILLE RD, on a net assessment of $8,564,900 and a 2025 general rate of 2.526.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 480 BERNARDSVILLE RD | 2 — Residential (four families or less) | $8,564,900 | 2025 | $216,349 |
| 7 CHAROLAIS FARM RD | 2 — Residential (four families or less) | $5,652,500 | 2025 | $142,782 |
| 1 CHAROLAIS FARM RD | 2 — Residential (four families or less) | $5,000,000 | 2025 | $126,300 |
| 475 BERNARDSVILLE RD | 2 — Residential (four families or less) | $4,850,000 | 2025 | $122,511 |
| 520 BERNARDSVILLE RD | 2 — Residential (four families or less) | $3,900,000 | 2025 | $98,514 |
Business
The highest business estimate in Mendham Boro is $555,720 at 84-86-88 E MAIN ST, on a net assessment of $22,000,000 and a 2025 general rate of 2.526.
| Address | Class | Net assessment | Rate year | Estimated tax |
|---|---|---|---|---|
| 84-86-88 E MAIN ST | 4A — Commercial | $22,000,000 | 2025 | $555,720 |
| 179 BLISS RD | 4A — Commercial | $8,000,000 | 2025 | $202,080 |
| 80 COLD HILL RD | 4A — Commercial | $6,500,000 | 2025 | $164,190 |
| 102 E MAIN ST | 4A — Commercial | $2,957,400 | 2025 | $74,704 |
| 2 COLD HILL RD | 4A — Commercial | $2,434,400 | 2025 | $61,493 |
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 Boro, typical class 2 assessment $672,415
Class 2 residential in the MOD-IV file: 1,616 parcels, average net assessment $672,415.
How assessments changed
Class 2 residential net assessments changed from $1,083,775,500 to $1,086,623,100, up 0.3%, on 1,616 parcels that have both a prior net and a 2026 net. This is the assessment roll, not an appraisal.
Among 57 usable recorded sales whose latest deed on this file is in 2025, the median price is $831,500. 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 | 1,616 | $1,086,623,100 | 77.8% |
| Vacant land 1 | 104 | $141,101,700 | 10.1% |
| Commercial 4A | 92 | $96,786,400 | 6.9% |
| Apartment 4C | 3 | $1,766,200 | 0.1% |
| Farm (regular) 3A | 44 | $70,840,700 | 5.1% |
| Farm (qualified) 3B | 72 | $424,300 | 0.0% |
| Other / unclassified other | 1 | $0 | 0.0% |
Housing stock in Mendham Boro, median year built 1971
On the 2026 file, class 2 houses in Mendham Boro with a year built have a median year of 1971, about 55 years old. Of those 1,612 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 83.6%, Vacant land 5.4%, Commercial 4.8%, Farm (qualified) 3.7%, Farm (regular) 2.3%, Apartment 0.2%, 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.