18405 W Observatory Rd, New Berlin, WI 53146

Listed by Joseph Kelenic • RE/MAX Legacy. Bought with RE/MAX Service First.

Off Market Jun 2020 for $425K

$651,847

Est. refi paymentEst. refi $2,722/mo

•

2 ba

•

1,406

sq ft

18405 W Observatory Rd, New Berlin, WI 53146

About this home

Public Remarks: Beautiful 3 Bedroom Ranch on 5+ Acres! This Open Concept home boasts a Vaulted Great Room with a Natural Fireplace and Beautiful Windows that enters into a Spacious Kitchen with Island and stainless steel appliances. Exit the Dinette through a new patio door to your large deck overlooking the Picturesque back yard. First floor also has Laundry Room, updated main Bathroom and an Amazing Master Suite with large walk in closet and Updated Master Bathroom. Head downstairs to the enormous Finished Lower Level with full walk out. Around the corner is another room perfect for an Office or Craft Room. Still moving through to the addition storage under the garage. This property nestled on 5.73 Acres has Gorgeous trees, landscaping, spring fed stream with plenty of open space. Your Paradise Awaits!

Single-familyProperty Type

1992Year Built

5.73 acresLot Size

$464Est. Price/Sq.Ft.

2 car garageParking

Listed by Joseph Kelenic • RE/MAX Legacy

Bought with Alyona Caravella • RE/MAX Service First

Source:METROMLS #1675818

Redfin Estimate

$651,847

$227K since sold in June 2020$2,000 since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 28% higher than the average sale price ($509K) of 6 comparable homes.

SOLD JUN 5, 2026
$475,000
A
3 beds1.5 baths2,712 sq ft
18775 W Observatory Rd, New Berlin, WI 53146
SOLD AUG 18, 2026
$570,000
B
3 beds2 baths2,070 sq ft
4450 S Hearthside Dr, New Berlin, WI 53151
SOLD JUL 9, 2026
$446,000
C
3 beds2 baths2,178 sq ft
16285 W Mayflower Dr, New Berlin, WI 53151
SOLD JUN 18, 2026
$607,500
D
3 beds2 baths1,939 sq ft
17000 W Observatory Rd, New Berlin, WI 53151
SOLD JUL 17, 2026
$426,500
E
3 beds2 baths2,044 sq ft
4585 S Harland Dr, New Berlin, WI 53151
SOLD JUN 15, 2026
$530,000
F
3 beds1.5 baths2,205 sq ft
16478 W Melody Ct, New Berlin, WI 53151

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Earn from this home

Sell

$314,346

Est. take-home

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Refinance

Est. cash available

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Rent

$2,596/mo

Redfin rental estimate

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Market trends in 53146, WI

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

102.4%

+0.7% MoM

Median sale price

$426K

$26K MoM

Avg. days on market

39d

1 days MoM

Recently sold homes

6 MoM

New listings for sale

$269,500
2 beds2 baths1,514 sq ft
17835 W Radam Dr #17835, New Berlin, WI 53146
Hoffmann Team* • RE/MAX Lakeside-Central
$1,495,000
4 beds3.5 baths4,434 sq ft
2850 S Amor Dr, New Berlin, WI 53146
Lisa Reinecke • RE/MAX Lakeside-West
See all

Provided by Redfin

Sale history for 18405 W Observatory Rd

Date

Event

Price

Public Records

Jun 5, 2020

Sold

$425,000

$302/sq ft

METROMLS #1675818

Feb 28, 2020

Sold

$425,000

$302/sq ft

Feb 8, 2020

Pending

—

Feb 6, 2020

Listed

$379,900

$270/sq ft

Public Remarks

Beautiful 3 Bedroom Ranch on 5+ Acres! This Open Concept home boasts a Vaulted Great Room with a Natural Fireplace and Beautiful Windows that enters into a Spacious Kitchen with Island and stainless steel appliances. Exit the Dinette through a new patio door to your large deck overlooking the Picturesque back yard. First floor also has Laundry Room, updated main Bathroom and an Amazing Master Suite with large walk in closet and Updated Master Bathroom. Head downstairs to the enormous Finished Lower Level with full walk out. Around the corner is another room perfect for an Office or Craft Room. Still moving through to the addition storage under the garage. This property nestled on 5.73 Acres has Gorgeous trees, landscaping, spring fed stream with plenty of open space. Your Paradise Awaits!

METROMLS #1013160

Jan 14, 2013

Listed

$259,900

$185/sq ft

Jan 14, 2013

Listing Removed

—

Jun 27, 2008

Sold

$261,000

$186/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$6,287 (+9.5%)

$164,000 + $317,300

$481,300

2024

$5,742

$164,000 + $317,300

$481,300

2023

$5,737 (−0.4%)

$103,400 + $259,600

$363,000

2022

$5,759 (+5.3%)

$103,400 + $259,600

$363,000

2021

$5,468 (+19.7%)

$103,400 + $259,600

$363,000

2020

$4,568 (−3.4%)

$103,400 + $259,600

$363,000

2019

$4,728 (+0.3%)

$103,400 + $198,700

$302,100

2018

$4,713 (+2.4%)

$103,400 + $198,700

$302,100

2017

$4,603 (−1.0%)

$91,000 + $180,600

$271,600

2016

$4,648 (+1.0%)

$91,000 + $180,600

$271,600

2014

$4,600

$85,300 + $169,500

$254,800

Tax history for 18405 W Observatory Rd

Year

Property tax

Land + Additions

Assessment*

2025

$6,287 (+9.5%)

$164,000 + $317,300

$481,300

2024

$5,742

$164,000 + $317,300

$481,300

2023

$5,737 (−0.4%)

$103,400 + $259,600

$363,000

2022

$5,759 (+5.3%)

$103,400 + $259,600

$363,000

2021

$5,468 (+19.7%)

$103,400 + $259,600

$363,000

2020

$4,568 (−3.4%)

$103,400 + $259,600

$363,000

2019

$4,728 (+0.3%)

$103,400 + $198,700

$302,100

2018

$4,713 (+2.4%)

$103,400 + $198,700

$302,100

2017

$4,603 (−1.0%)

$91,000 + $180,600

$271,600

2016

$4,648 (+1.0%)

$91,000 + $180,600

$271,600

2014

$4,600

$85,300 + $169,500

$254,800

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

Zoning

C-1

Upland Resource Conservancy District

The C-1 Conservancy District is intended to prevent the destruction of valuable natural and man-made resources and, in particular, woodlands, wetlands, wildlife habitat areas, perennial and intermittent streams, major lakes, floodlands and shorelands, significant water recharge and discharge areas, prairies, recreational and scenic areas, natural scientific areas, areas with poor soils or high groundwater, and areas of steep slopes, including primary environmental corridor, secondary environmental corridor and isolated natural resource areas. Regulation of these areas, including environmental corridors, should serve to control erosion and sedimentation and to protect the natural resource base and promote and maintain the natural beauty of the area as well as the health, safety, and welfare of City residents.

Permitted uses

Include but are not limited to:

Agriculture
Housing-Single unit
Infrastructure
Agriculture-Cropland
Park & open space
Wilderness

Property details

Interior

Basement Information
Basement Sq. Ft: 1,820
Basement Type: Full

Bathroom Information
# of Full Baths: 2

Heating & Cooling
Heating Fuel Type: Gas
Heating Type: Forced Air

Fireplace Information
Has Fireplace

Room Information
# of Rooms: 6

Exterior

Exterior Information
Floor Construction Type: Plywood
Foundation Type: Continuous Footing
Building Style Type: Ranch
Exterior Wall: Aluminum/Vinyl
Roof Covering Type: Clay Tile
Roof Shape Type: Clay Tile
Building Improvement Type: Single Family

Property Information
Living Sq. Ft: 1,406
Ground Floor Sq. Ft: 1,406
Building Sq. Ft: 3,666
# of Stories: 1
Legal Description: PT SE.25 NW.25 SEC 21 T6N R20E COM AT NW COR,TH S 10' E 1332 FT, TH E 98.10 FT,TH N 10' W 1332 FT,TH W 98.11 FT/BGN ALSO PT NW.25 SEC 21 COM AT PT IN W .25 LI OF SD SEC 1228.12 FT N 89 DGR 20'10" E OF .25 COR;TH N 0 DGR 40'40" W 1312.74 FT TO C/L 90.16 FT;TH S 0 DGR 40'40" E 1318.16 FT;TH S 89 DGR 20' 10" W 90 FT/BGN DOC #4481059 06/05/2020

Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 440
Garage / Carport Type: Attached

Lot Information
# of Buildings: 1
Land Sq. Ft: 249,599
Municipality Name: NEW BERLIN CITY
Acres: 5.73
Zoning Code: R2
State Use Description: RESIDENTIAL

Utility Information
Sewer Type: Septic
Water Service Type: Well
Utility Type: Gas Public

Financial

Assessor Information
Assessment Year: 2025
Tax District County: NEW BERLIN CITY

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 1,406
Stories: 1.0
Lot Size: 5.73 acres
Style: Single Family Residential
Year Built: 1992
Year Renovated: —
County: Waukesha County
APN: NBC 1234992

Home facts updated by county records on Jun 15, 2026

Around this home

Schools

Ronald Reagan Elementary School

Public PreK-6 • Assigned • 0.6mi

6/10

New Berlin Middle/High School

Public 7-12 • Assigned • 1.5mi

9/10

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

3/10 Fire Factor

0.31% chance of being in a wildfire in next 30 years

2/10 Heat Factor

7 days above 100° expected this year, 13 days in 30 years

2/10 Wind Factor

Minor risk of severe winds over next 30 years

2/10 Air Factor

1 unhealthy days expected this year, 1 days in 30 years

Provided by First Street

Historical weather

New Berlin, WI • 53146

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 10 hours in June and 3.4 hours in December, placing it below the U.S. average for solar exposure.

10 hrs

3.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$620,000 – $750,000

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Lisa Reinecke • RE/MAX Lakeside-West

New listings for sale in 53146

$269,500

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17835 W Radam Dr #17835, New Berlin, WI 53146

Hoffmann Team* • RE/MAX Lakeside-Central

$1,495,000

4 beds3.5 baths4,434 sq ft

2850 S Amor Dr, New Berlin, WI 53146

Lisa Reinecke • RE/MAX Lakeside-West

Home values near 18405 W Observatory Rd

Data from public records.

Address	Redfin Estimate
18725 West Observatory Rd, New Berlin, WI 3 Beds \| 2 Baths \| 1680 Sq. Ft.	$521,192
18200 West Observatory Rd, New Berlin, WI 4 Beds \| 3.5 Baths \| 3315 Sq. Ft.	$1,015,785

Address	Redfin Estimate
18760 West Observatory Rd, New Berlin, WI 3 Beds \| 2 Baths \| 1920 Sq. Ft.	$497,974
18045 West Observatory Rd, New Berlin, WI 2 Beds \| - Baths \| - Sq. Ft.	—

Address	Redfin Estimate
18775 West Observatory Rd, New Berlin, WI 3 Beds \| 1.5 Baths \| 2712 Sq. Ft.	$532,270
18625 West Observatory Rd, New Berlin, WI 3 Beds \| 2 Baths \| 1772 Sq. Ft.	$543,079

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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 53146, WI

Sale history for 18405 W Observatory Rd

Tax history for 18405 W Observatory Rd

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 53146

Home values near 18405 W Observatory Rd

More real estate resources