Google street view image for 129 Union St, Montclair, NJ 07042

Off market aug 1998 for $399K

$2,416,365

Est. refi paymentEst. refi $2,888/mo

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•

— ba

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5,179

sq ft

129 Union St, Montclair, NJ 07042

About this home

129 Union St is a 5,179 square foot house on a 0.5 acre lot. - it last sold on August 28, 1998 for $399,000. Based on Redfin's Montclair data, we estimate the home's value is $2,416,365.

Single-familyProperty Type

1917Year Built

0.5 acresLot Size

$467Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,416,365

$2.0M since sold in August 1998$181K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 6.5% lower than the average sale price ($2.59M) of 6 comparable homes.

SOLD SEP 10, 2026
$2,490,000
A
6 beds5 baths— sq ft
65 S Mountain Ave, Montclair, NJ 07042-1735
SOLD AUG 13, 2026
$3,149,000
B
6 beds6.5 baths— sq ft
2 Russell Ter, Montclair, NJ 07042
West of Hudson Real Estate
SOLD AUG 12, 2026
$4,400,000
C
6 beds5.5 baths— sq ft
162 Union St, Montclair, NJ 07042-2124
SOLD JUL 31, 2026
$1,999,999
D
6 beds2.5 baths— sq ft
118 S Fullerton Ave, Montclair, NJ 07042-2631
SOLD JUL 15, 2026
$1,825,000
E
6 beds3.5 baths— sq ft
104 GATES Ave, Montclair, NJ 07042-2511
SOLD JUN 12, 2026
$1,650,000
F
5 beds3.5 baths— sq ft
12 Harrison Ave, Montclair, NJ 07042-2101

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Earn from this home

Sell

$2,242,581

Est. take-home

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Refinance

Est. cash available

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Market trends in 07042, NJ

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

117.3%

2.3% MoM

Median sale price

$1.1M

$40K MoM

Avg. days on market

23d

6 days MoM

Recently sold homes

15 MoM

New listings for sale

OPEN SAT, 2PM TO 4PM
$2,595,000
8 beds5 baths— sq ft
20 Prospect Ave, Montclair, NJ 07042-1915
OPEN SAT, 2PM TO 4PM
$419,000
2 beds1 bath— sq ft
14 Forest St #102, Montclair, NJ 07042-3512
OPEN TODAY, 5PM TO 7PM
$715,000
2 beds2.5 baths1,500 sq ft
15 Garden St, Montclair, NJ 07042-4115
OPEN SAT, 2PM TO 4PM
$1,749,000
4 beds4.5 baths— sq ft
136 Montclair Ave, Montclair, NJ 07042-4132
OPEN SAT, 1PM TO 3PM
$2,500,000
10 beds10 baths— sq ft
37 Washington St, Montclair, NJ 07042-4557
OPEN SUN, 2PM TO 4PM
$319,000
1 bed1 bath— sq ft
80 Bay St #7, Montclair, NJ 07042-4862
OPEN SAT, 1PM TO 3PM
$795,000
3 beds3 baths— sq ft
30 Irving St., Unit 1, Montclair, NJ 07042-4524
OPEN SUN, 2PM TO 4PM
$999,000
3 beds2 baths— sq ft
22 Euclid Pl, Montclair, NJ 07042-5022
$1,089,000
4 beds3.5 baths— sq ft
6 Sutherland Rd, Montclair, NJ 07042-2443
$899,000
4 beds2.5 baths— sq ft
15 Euclid Pl, Montclair, NJ 07042-5021
See all

Provided by Redfin

Sale history for 129 Union St

Year

Property tax

Land + Additions

Assessment*

2025

$42,765 (+3.3%)

$321,200 + $895,100

$1,216,300

2024

$41,391 (+0.7%)

$321,200 + $895,100

$1,216,300

2023

$41,111 (+2.8%)

$321,200 + $895,100

$1,216,300

2022

$39,992 (+1.8%)

$321,200 + $895,100

$1,216,300

2021

$39,299 (+1.6%)

$321,200 + $895,100

$1,216,300

2020

$38,666 (+1.0%)

$321,200 + $895,100

$1,216,300

2019

$38,265 (+1.6%)

$321,200 + $895,100

$1,216,300

2018

$37,654 (+4.4%)

$321,200 + $895,100

$1,216,300

2017

$36,082 (+2.8%)

$321,200 + $895,800

$1,217,000

2016

$35,115 (+6.6%)

$274,800 + $691,500

$966,300

2014

$32,931 (+3.2%)

$274,800 + $691,500

$966,300

2013

$31,898 (+1.5%)

$274,800 + $691,500

$966,300

2012

$31,434 (+0.6%)

$274,800 + $691,500

$966,300

2011

$31,242 (+1.7%)

$274,800 + $691,500

$966,300

2010

$30,729 (+5.5%)

$489,200 + $730,700

$1,219,900

2009

$29,119

$489,200 + $730,700

$1,219,900

Tax history for 129 Union St

Year

Property tax

Land + Additions

Assessment*

2025

$42,765 (+3.3%)

$321,200 + $895,100

$1,216,300

2024

$41,391 (+0.7%)

$321,200 + $895,100

$1,216,300

2023

$41,111 (+2.8%)

$321,200 + $895,100

$1,216,300

2022

$39,992 (+1.8%)

$321,200 + $895,100

$1,216,300

2021

$39,299 (+1.6%)

$321,200 + $895,100

$1,216,300

2020

$38,666 (+1.0%)

$321,200 + $895,100

$1,216,300

2019

$38,265 (+1.6%)

$321,200 + $895,100

$1,216,300

2018

$37,654 (+4.4%)

$321,200 + $895,100

$1,216,300

2017

$36,082 (+2.8%)

$321,200 + $895,800

$1,217,000

2016

$35,115 (+6.6%)

$274,800 + $691,500

$966,300

2014

$32,931 (+3.2%)

$274,800 + $691,500

$966,300

2013

$31,898 (+1.5%)

$274,800 + $691,500

$966,300

2012

$31,434 (+0.6%)

$274,800 + $691,500

$966,300

2011

$31,242 (+1.7%)

$274,800 + $691,500

$966,300

2010

$30,729 (+5.5%)

$489,200 + $730,700

$1,219,900

2009

$29,119

$489,200 + $730,700

$1,219,900

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Property details

Exterior

Exterior Information
Exterior Wall: Frame

Property Information
Living Sq. Ft: 5,179
# of Stories: 2
Legal Description: INCL BLK 1304 LOTS 13 & 14

Parking & Garage Information
# of Parking Spaces: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 21,580
Legal Lot Number: 14
Legal Block Number: 1304
Municipality Name: MONTCLAIR TWP
Acres: 0.4954
Depth Footage: 130
Front Footage: 166
State Use Description: RESIDENTIAL

Financial

Assessor Information
Assessment Year: 2026
Tax District County: MONTCLAIR TWP

Public facts

Beds: —
Baths: —
Sq. Ft.: 5,179
Stories: 2.0
Lot Size: 0.5 acres
Style: Single Family Residential
Year Built: 1917
Year Renovated: —
County: Essex County
APN: 1301304 00014

Home facts updated by county records on Sep 14, 2026

Around this home

Schools

Hillside Elementary School

Public PreK-5 • Assigned • 0.3mi

9/10

Glenfield Middle School

Public 6-8 • Assigned • 0.8mi

7/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

6/10 Heat Factor

7 days above 100° expected this year, 14 days in 30 years

6/10 Wind Factor

27% chance of strong winds in next 30 years

4/10 Air Factor

3 unhealthy days expected this year, 5 days in 30 years

Provided by First Street

Historical weather

Montclair, NJ • 07042

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 8.6 hours in June and 4.3 hours in December, placing it below the U.S. average for solar exposure.

8.6 hrs

4.3 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.30M – $2.78M

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OPEN SAT, 1PM TO 3PM

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OPEN SUN, 2PM TO 4PM

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4 beds3.5 baths— sq ft

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Home values near 129 Union St

Data from public records.

Address	Redfin Estimate
144 Union St, Montclair, NJ 7 Beds \| 5.5 Baths \| - Sq. Ft.	$2,651,412
139 Union St, Montclair, NJ - Beds \| - Baths \| 5488 Sq. Ft.	$3,093,925

Address	Redfin Estimate
140 Union St, Montclair, NJ - Beds \| - Baths \| 1980 Sq. Ft.	$1,731,385
133 Union St, Montclair, NJ - Beds \| - Baths \| 4738 Sq. Ft.	$2,471,904

Address	Redfin Estimate
152 Union St, Montclair, NJ 5 Beds \| 4 Baths \| - Sq. Ft.	$2,366,064
147 Union St, Montclair, NJ 5 Beds \| 6 Baths \| - Sq. Ft.	$3,560,941

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