Google street view image for 1 Cosma Pl, Mendham, NJ 07945

Off market nov 1999 for $240K

$722,121

Est. refi paymentEst. refi $1,388/mo

—

•

— ba

•

2,274

sq ft

1 Cosma Pl, Mendham, NJ 07945

About this home

1 Cosma Pl is a 2,274 square foot house on a 9,148 square foot lot. - it last sold on November 10, 1999 for $240,000. Based on Redfin's Mendham data, we estimate the home's value is $722,121.

Single-familyProperty Type

1930Year Built

9,148 sq ftLot Size

$318Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$722,121

$482K since sold in November 1999$6,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 13% lower than the average sale price ($830K) of 6 comparable homes.

SOLD AUG 28, 2026
7 Cosma Pl, Mendham, NJ 07945-1305
$1,175,000
A
4 beds2.5 baths— sq ft
7 Cosma Pl, Mendham, NJ 07945-1305
SOLD SEP 23, 2026
$610,000
B
3 beds1 bath— sq ft
48 Mountain Ave, Mendham, NJ 07945-1400
SOLD AUG 5, 2026
$910,000
C
4 beds3 baths— sq ft
4 Hillcrest Ave, Mendham, NJ 07945
SOLD JUN 12, 2026
2 Aster Ter, Mendham, NJ 07945-1314
$750,000
D
3 beds3 baths— sq ft
2 Aster Ter, Mendham, NJ 07945-1314
SOLD JUN 26, 2026
$750,000
E
3 beds1.5 baths— sq ft
74 Dean Rd, Mendham, NJ 07945-1632
SOLD JUN 18, 2026
$785,000
F
2 beds2 baths— sq ft
81 MOUNTAIN Ave, Mendham, NJ 07945-1327

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Earn from this home

Sell

$647,587

Est. take-home

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Refinance

Est. cash available

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Market trends in 07945, NJ

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

103.7%

1.0% MoM

Median sale price

$1.2M

$85K MoM

Avg. days on market

14d

1 days MoM

Recently sold homes

4 MoM

New listings for sale

NEW 21 HRS AGO
$1,795,000
4 beds4.5 baths— sq ft
1 Beach Ln, Mendham, NJ 07945-2944
$699,000
3 beds1.5 baths1,420 sq ft
79 W Main St W, Mendham, NJ 07945
$585,000
2 beds2.5 baths1,680 sq ft
29 Galway Dr, Mendham, NJ 07945-2011
$1,525,000
5 beds3.5 baths3,440 sq ft
9 Trimingham Ct, Mendham, NJ 07945-1855
$1,100,000
4 beds2.5 baths2,235 sq ft
29 Orchard St, Mendham, NJ 07945-1630
$1,199,000
4 beds2.5 baths— sq ft
2 Mansfield Ct, Mendham, NJ 07945-1312
See all

Provided by Redfin

Sale history for 1 Cosma Pl

Year

Property tax

Land + Additions

Assessment*

2026

$11,207 (+5.4%)

$231,000 + $190,000

$421,000

2025

$10,634 (+2.7%)

$231,000 + $190,000

$421,000

2024

$10,357 (+0.2%)

$231,000 + $190,000

$421,000

2023

$10,331 (+2.9%)

$231,000 + $190,000

$421,000

2022

$10,037 (+1.8%)

$231,000 + $190,000

$421,000

2021

$9,860 (+1.8%)

$231,000 + $190,000

$421,000

2020

$9,687 (+2.4%)

$231,000 + $190,000

$421,000

2019

$9,460 (+1.4%)

$231,000 + $190,000

$421,000

2018

$9,325 (+1.5%)

$231,000 + $190,000

$421,000

2017

$9,190 (+3.1%)

$231,000 + $190,000

$421,000

2016

$8,912 (+5.0%)

$231,000 + $190,000

$421,000

2014

$8,487 (+3.0%)

$231,000 + $190,000

$421,000

2013

$8,239 (+2.0%)

$231,000 + $190,000

$421,000

2012

$8,075 (+0.5%)

$231,000 + $190,000

$421,000

2011

$8,033 (+0.5%)

$231,000 + $190,000

$421,000

2010

$7,995 (+14.5%)

$231,000 + $190,000

$421,000

2009

$6,980

$231,000 + $190,000

$421,000

Tax history for 1 Cosma Pl

Year

Property tax

Land + Additions

Assessment*

2026

$11,207 (+5.4%)

$231,000 + $190,000

$421,000

2025

$10,634 (+2.7%)

$231,000 + $190,000

$421,000

2024

$10,357 (+0.2%)

$231,000 + $190,000

$421,000

2023

$10,331 (+2.9%)

$231,000 + $190,000

$421,000

2022

$10,037 (+1.8%)

$231,000 + $190,000

$421,000

2021

$9,860 (+1.8%)

$231,000 + $190,000

$421,000

2020

$9,687 (+2.4%)

$231,000 + $190,000

$421,000

2019

$9,460 (+1.4%)

$231,000 + $190,000

$421,000

2018

$9,325 (+1.5%)

$231,000 + $190,000

$421,000

2017

$9,190 (+3.1%)

$231,000 + $190,000

$421,000

2016

$8,912 (+5.0%)

$231,000 + $190,000

$421,000

2014

$8,487 (+3.0%)

$231,000 + $190,000

$421,000

2013

$8,239 (+2.0%)

$231,000 + $190,000

$421,000

2012

$8,075 (+0.5%)

$231,000 + $190,000

$421,000

2011

$8,033 (+0.5%)

$231,000 + $190,000

$421,000

2010

$7,995 (+14.5%)

$231,000 + $190,000

$421,000

2009

$6,980

$231,000 + $190,000

$421,000

*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
Subdivision Name: COSMA LAKE
Living Sq. Ft: 2,274
# of Stories: 2

Parking & Garage Information
# of Parking Spaces: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 9,148
Legal Lot Number: 1
Legal Block Number: 304
Municipality Name: MENDHAM BORO
Acres: 0.21
Depth Footage: 123
Front Footage: 71
Zoning Code: 1/4A
State Use Description: RESIDENTIAL

Financial

Assessor Information
Assessment Year: 2026
Tax District County: MENDHAM BOROUGH

Public facts

Beds: —
Baths: —
Sq. Ft.: 2,274
Stories: 2.0
Lot Size: 9,148 square feet
Style: Single Family Residential
Year Built: 1930
Year Renovated: —
County: Morris County
APN: 1800304 00001

Home facts updated by county records on Oct 8, 2026

Around this home

Schools

Mountain View Middle School

Public 5-8 • Assigned • 0.5mi

9/10

West Morris Mendham High School

Public 9-12 • Assigned • 0.9mi

10/10

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

5/10 Heat Factor

7 days above 97° expected this year, 15 days in 30 years

6/10 Wind Factor

27% chance of strong winds in next 30 years

3/10 Air Factor

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

Provided by First Street

Historical weather

Mendham, NJ • 07945

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 4.1 hours in December, placing it below the U.S. average for solar exposure.

8.6 hrs

4.1 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$687,000 – $831,000

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Nearby similar homes

NEW 21 HRS AGO

$1,795,000

4 beds4.5 baths— sq ft

1 Beach Ln, Mendham, NJ 07945-2944

Cul-de-sac location • Brookrace community • Custom millwork

$699,000

3 beds1.5 baths1,420 sq ft

79 W Main St W, Mendham, NJ 07945

Renovated colonial • Open floor plan • Chef's kitchen

$1,050,000

4 beds2.5 baths— sq ft

4 E Main St, Mendham, NJ 07945-1535

Historic character • Wide-plank floors • New roof

$1,690,000

6 beds6.5 baths— sq ft

235 Mountainside Rd, Mendham, NJ 07945-1100

Paneled library • Open plan kitchen • Cathedral ceiling

OPEN SUN, 1PM TO 3PM3D WALKTHROUGH

$3,248,000

7 beds7.5 baths7,100 sq ft

237 Mountainside Rd, Mendham Township, NJ 07945-1100

Private acres • Chef's kitchen • Primary suite

$7,500,000

6 beds8.5 baths— sq ft

171 Campbell Road Rd, Bernardsville, NJ 07924

Private acres • Mature woodland • 7 garage spots

New listings for sale in 07945-2944

NEW 21 HRS AGO

$1,795,000

4 beds4.5 baths— sq ft

1 Beach Ln, Mendham, NJ 07945-2944

Cul-de-sac location • Brookrace community • Custom millwork

$699,000

3 beds1.5 baths1,420 sq ft

79 W Main St W, Mendham, NJ 07945

Renovated colonial • Open floor plan • Chef's kitchen

$585,000

2 beds2.5 baths1,680 sq ft

29 Galway Dr, Mendham, NJ 07945-2011

Finished lower level • Inviting rear deck • Playground

$1,525,000

5 beds3.5 baths3,440 sq ft

9 Trimingham Ct, Mendham, NJ 07945-1855

Custom colonial • New windows • Central vacuum

$1,100,000

4 beds2.5 baths2,235 sq ft

29 Orchard St, Mendham, NJ 07945-1630

Custom built-ins • Granite countertops • Vaulted ceiling

$1,199,000

4 beds2.5 baths— sq ft

2 Mansfield Ct, Mendham, NJ 07945-1312

Cul-de-sac • White kitchen • Great room

Home values near 1 Cosma Pl

Data from public records.

Address	Redfin Estimate
3 Cosma Place, Mendham, NJ - Beds \| - Baths \| 1553 Sq. Ft.	$637,298
16 Lake Drive, Mendham, NJ - Beds \| - Baths \| 3272 Sq. Ft.	$828,006

Address	Redfin Estimate
5 Cosma Place, Mendham, NJ 4 Beds \| 2.5 Baths \| 2704 Sq. Ft.	$1,139,904
14 Lake Drive, Mendham, NJ - Beds \| - Baths \| 1697 Sq. Ft.	$731,675

Address	Redfin Estimate
7 Cosma Place, Mendham, NJ 4 Beds \| 2.5 Baths \| - Sq. Ft.	$1,005,394
15 Country Lane, Mendham, NJ 2 Beds \| 2.5 Baths \| - Sq. Ft.	$1,188,393

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 07945, NJ

Sale history for 1 Cosma Pl

Tax history for 1 Cosma Pl

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 07945-2944

Home values near 1 Cosma Pl

More real estate resources