Google street view image for 20859 Starshine Rd, Diamond Bar, CA 91789

Off Market Aug 1983 for $170K

$1,182,812

Est. refi paymentEst. refi $900/mo

•

3 ba

•

2,243

sq ft

20859 Starshine Rd, Diamond Bar, CA 91789

About this home

20859 Starshine Rd is a 2,243 square foot house on a 8,734 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on August 22, 1983 for $170,000. Based on Redfin's Diamond Bar data, we estimate the home's value is $1,182,812.

Single-familyProperty Type

1983Year Built

8,734 sq ftLot Size

$527Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,182,812

$1.0M since sold in August 1983$8,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 10.1% lower than the average sale price ($1.32M) of 6 comparable homes.

SOLD MAY 13, 2026
$1,250,000
A
4 beds3 baths2,150 sq ft
20899 Starshine, Diamond Bar, CA 91789
SOLD APR 1, 2026
$1,390,000
B
4 beds3 baths2,781 sq ft
20885 Starshine, Diamond Bar, CA 91789
SOLD JUL 28, 2026
$1,319,000
C
4 beds2.5 baths2,432 sq ft
1321 Glenthorpe, Diamond Bar, CA 91789
Real Broker
SOLD MAY 27, 2026
$1,350,000
D
5 beds3 baths2,186 sq ft
21009 Quail Run, Diamond Bar, CA 91789
SOLD JUN 26, 2026
$1,100,000
E
4 beds2.5 baths2,265 sq ft
20512 Starshine, Walnut, CA 91789
SOLD APR 17, 2026
$1,488,000
F
4 beds3 baths2,426 sq ft
20573 Missionary Ridge St, Walnut, CA 91789

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Earn from this home

Sell

$1,117,651

Est. take-home

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Refinance

Est. cash available

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Rent

$4,297/mo

Redfin rental estimate

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Market trends in 91789, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

99.3%

0.3% MoM

Median sale price

$1.2M

$18K MoM

Avg. days on market

32d

7 days MoM

Recently sold homes

2 MoM

New listings for sale

$1,298,000
4 beds2.5 baths2,140 sq ft
1371 Point Loma, Walnut, CA 91789
$3,380,000
8 beds8 baths5,477 sq ft
19519 Mulberry Dr, Walnut, CA 91789
$1,125,000
4 beds3 baths1,756 sq ft
19564 Vista Hermosa Dr, Walnut, CA 91789
$1,250,000
5 beds3 baths2,304 sq ft
1313 Fairlance, Diamond Bar, CA 91789
$796,660
4 beds3 baths1,846 sq ft
1034 E Romney Dr, Diamond Bar, CA 91789
OPEN SEP 26, 11AM TO 2PM
$775,000
4 beds3 baths2,932 sq ft
949 Fontes, Walnut, CA 91789
$899,000
3 beds2 baths1,463 sq ft
712 Marylie Ln, Walnut, CA 91789
See all

Provided by Redfin

Sale history for 20859 Starshine Rd

Year

Property tax

Land + Additions

Assessment*

2025

$5,352 (+6.8%)

$67,730 + $319,476

$387,206

2024

$5,011 (+2.3%)

$67,730 + $319,476

$387,206

2023

$4,896 (+2.2%)

$66,402 + $313,212

$379,614

2022

$4,793 (+2.1%)

$65,100 + $307,071

$372,171

2021

$4,695 (+1.3%)

$63,824 + $301,050

$364,874

2020

$4,637 (+1.9%)

$62,573 + $295,148

$357,721

2019

$4,550 (+5.2%)

$61,932 + $292,122

$354,054

2018

$4,327 (+4.6%)

$60,718 + $286,395

$347,113

2017

$4,135 (+3.4%)

$58,361 + $275,275

$333,636

2016

$4,000 (−0.5%)

$58,361 + $275,275

$333,636

2015

$4,021 (−0.2%)

$57,217 + $269,878

$327,095

2014

$4,028 (+1.3%)

$55,255 + $260,618

$315,873

2012

$3,977 (+3.0%)

$55,006 + $259,441

$314,447

2011

$3,862 (+0.8%)

$53,928 + $254,354

$308,282

2010

$3,830 (+0.5%)

$52,871 + $249,367

$302,238

2009

$3,810 (+2.9%)

$52,476 + $247,504

$299,980

2008

$3,703

$52,601 + $248,092

$300,693

Tax history for 20859 Starshine Rd

Year

Property tax

Land + Additions

Assessment*

2025

$5,352 (+6.8%)

$67,730 + $319,476

$387,206

2024

$5,011 (+2.3%)

$67,730 + $319,476

$387,206

2023

$4,896 (+2.2%)

$66,402 + $313,212

$379,614

2022

$4,793 (+2.1%)

$65,100 + $307,071

$372,171

2021

$4,695 (+1.3%)

$63,824 + $301,050

$364,874

2020

$4,637 (+1.9%)

$62,573 + $295,148

$357,721

2019

$4,550 (+5.2%)

$61,932 + $292,122

$354,054

2018

$4,327 (+4.6%)

$60,718 + $286,395

$347,113

2017

$4,135 (+3.4%)

$58,361 + $275,275

$333,636

2016

$4,000 (−0.5%)

$58,361 + $275,275

$333,636

2015

$4,021 (−0.2%)

$57,217 + $269,878

$327,095

2014

$4,028 (+1.3%)

$55,255 + $260,618

$315,873

2012

$3,977 (+3.0%)

$55,006 + $259,441

$314,447

2011

$3,862 (+0.8%)

$53,928 + $254,354

$308,282

2010

$3,830 (+0.5%)

$52,871 + $249,367

$302,238

2009

$3,810 (+2.9%)

$52,476 + $247,504

$299,980

2008

$3,703

$52,601 + $248,092

$300,693

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

Zoning

Low Density Residential District

The RL zoning district is intended primarily for parcels developed with existing detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be three dwellings per gross acre. The RL zoning district is consistent with the low density residential land use category of the general plan.

Permitted uses

Include but are not limited to:

Livestock production
Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure
Fire house
Police station
Park & open space

Property details

Interior

Heating & Cooling
Air Conditioning Type: Central
Heating Type: Central

Exterior

Pool Information
Has Pool

Property Information
Subdivision Name: 35742
Living Sq. Ft: 2,243
# of Units: 1
Legal Description: TR=35742 LOT 25

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,734
Legal Lot Number: 25
Municipality Name: DIAMOND BAR
Acres: 0.2005
Depth Footage: 119
Front Footage: 70
Zoning Code: LCRPD100006U*
County Use Description: SINGLE FAMILY RESID

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,243
Stories: —
Lot Size: 8,734 square feet
Style: Single Family Residential
Year Built: 1983
Year Renovated: 1983
County: Los Angeles County
APN: 8765004025

Home facts updated by county records on Aug 31, 2026

Around this home

Schools

Evergreen Elementary School

Public K-5 • Assigned • 1.0mi

9/10

Chaparral Middle School

Public 6-8 • Assigned • 1.9mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.7mi

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

4/10 Fire Factor

3% chance of being in a wildfire in next 30 years

5/10 Heat Factor

5 days above 99° expected this year, 14 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

7/10 Air Factor

13 unhealthy days expected this year, 14 days in 30 years

Provided by First Street

Historical weather

Diamond Bar, CA • 91789

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 9.5 hours in June and 6.9 hours in December, placing it above the U.S. average for solar exposure.

9.5 hrs

6.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.12M – $1.36M

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Nearby similar homes

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20977 E Canyon Ridge Ln, Diamond Bar, CA 91789

New listings for sale in 91789

$1,298,000

4 beds2.5 baths2,140 sq ft

1371 Point Loma, Walnut, CA 91789

$3,380,000

8 beds8 baths5,477 sq ft

19519 Mulberry Dr, Walnut, CA 91789

$1,125,000

4 beds3 baths1,756 sq ft

19564 Vista Hermosa Dr, Walnut, CA 91789

$1,250,000

5 beds3 baths2,304 sq ft

1313 Fairlance, Diamond Bar, CA 91789

$796,660

4 beds3 baths1,846 sq ft

1034 E Romney Dr, Diamond Bar, CA 91789

OPEN SEP 26, 11AM TO 2PM

$775,000

4 beds3 baths2,932 sq ft

949 Fontes, Walnut, CA 91789

$899,000

3 beds2 baths1,463 sq ft

712 Marylie Ln, Walnut, CA 91789

Home values near 20859 Starshine Rd

Data from public records.

Address	Redfin Estimate
20838 Starshine Road, Diamond Bar, CA 4 Beds \| 3 Baths \| 1970 Sq. Ft.	$1,127,164
20854 Starshine Road, Diamond Bar, CA 5 Beds \| - Baths \| 3000 Sq. Ft.	$1,434,743

Address	Redfin Estimate
20844 Starshine Road, Diamond Bar, CA 4 Beds \| - Baths \| 2243 Sq. Ft.	$1,330,562
20858 Starshine Road, Diamond Bar, CA 4 Beds \| 3 Baths \| 1970 Sq. Ft.	$1,246,067

Address	Redfin Estimate
20850 Starshine Road, Diamond Bar, CA 4 Beds \| 3 Baths \| 2100 Sq. Ft.	$1,294,357
20862 Starshine Road, Diamond Bar, CA 5 Beds \| 3 Baths \| 2982 Sq. Ft.	$1,609,577

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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 91789, CA

Sale history for 20859 Starshine Rd

Tax history for 20859 Starshine Rd

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 91789

Home values near 20859 Starshine Rd

More real estate resources