Essex County and Montclair Township property record for 21 Upper Mountain Ave, Montclair, NJ 07042
| Property Type | Single Family Home |
|---|---|
| Details | 2,834 sqft · built 1877 |
| Lot Size | 0.241 acres (10,486 sqft) |
| Owner | Individual Name on File |
| Last Sale | $721,000 (Aug 2016) |
| Tax Bill | $21,300 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 13-01401-0000-00001 |
| Primary APN | 13-01401-0000-00001 |
|---|---|
| Alternative APN |
|
| Stories | 2 Stories |
|---|---|
| Building Area | 2,834 sqft Living Area |
| Year Built | Built 1877 |
|---|---|
| Effective Year Built | Effective 1877 |
| Construction Type | Frame |
| Lot Area | 10,486 sqft (0.241 acres) |
| Lot Dimensions | 107 ft deep x 98 ft wide |
| Old Parcel Number | 130140100001 |
|---|---|
| Street Address | 21 UPPER MOUNTAIN AVE |
| City | MONTCLAIR |
| State | NJ |
| Zip | 07042-1813 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R2 |
| Legal Description | 98X107 IRR |
| Legal Block | 1401 |
| Legal Lot Number | 1 |
| Jurisdiction | ESSEX NJ |
| Township / Civil Division | MONTCLAIR |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 16900 |
21 Upper Mountain Ave is owned and occupied by an individual who bought it in August 2016.
Source: Essex County and Montclair Township records, as of July 2, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 21 UPPER MOUNTAIN AVE, MONTCLAIR, NJ 07042-1813 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 11, 2016 · Amount on File |
| Deed Sale | Aug 11, 2016 · Amount on File |
| Prior Sale | Oct 25, 1991 · Amount on File |
| Deed Document Number | 201668504 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 21 Upper Mountain Ave was $21,300, up 3.3% from the year before.
Source: Essex County and Montclair Township assessment roll, as of July 2, 2026
| Type | Name |
|---|---|
| State | New Jersey |
| County | Essex County |
| County Subdivision | Montclair Township |
| Unified School District | Montclair Town School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $605,800 (-) Land $182,600 Building $423,200 | $605,800 (-) Land $182,600 Building $423,200 | |
| 2025 | $21,300.00 (+3.32%) | $605,800 Land $182,600 Building $423,200 | $605,800 Land $182,600 Building $423,200 |
| 2024 | $20,615.00 | ||
| 2023 | $605,800 Land $182,600 Building $423,200 | $605,800 Land $182,600 Building $423,200 | |
| 2022 | $19,918.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 Upper Mountain Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2023.
Source: FEMA National Flood Hazard Layer, effective September 24, 2020 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 2 in force |
| Nearby Flood Claims | 1 (2023) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 2023 · rainfall accumulation |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
The area around 21 Upper Mountain Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MONTCLAIR WATER BUREAU serves 40,150 people · EPA ID NJ0713001 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Sep 2024 |
| Lead | Under 1 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Corrosion control Jan 2024 |
| Monitoring and Reporting | 1 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 329 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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