20128 Diehl St, Walnut, CA 91789
SOLD
SEP 8, 2026
Listed by CHENGLIANG YAO, RE/MAX Premier Properties, (626) 615-0493 . Bought with RE/MAX 2000 REALTY

$1,687,500

Trulia Estimate
  • 4 Beds
  • 4 Baths
  • 2,910 sqft

20128 Diehl St, Walnut, CA 91789

Est. Refi. Payment $10,625/mo*
Refinance Your Home
Currently Off Market - Sold Sep 8, 2026 for $1,650,000 (4% below list price)

Home Value

Trulia Estimate
$1.69M
Since last month
Decreased$34K (-2%)
Since last year
Increased$224K (+15.3%)
Since last sale
Increased$35K (+2.1%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +212% in the last 10 years
MonthEstimated value
2026
September 2026$1.69M
August 2026$1.69M
July 2026$1.72M
June 2026$1.47M
May 2026$1.47M
April 2026$1.46M
March 2026$1.48M
February 2026$1.45M
January 2026$1.45M
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
20410 Julliard Dr, Walnut, CA
0.32
Single-Family Home
$1,272,000
10/10/25
4
3
1,992
20157 McKay Dr, Walnut, CA
0.22
Single-Family Home
$1,075,000
10/27/25
4
2
1,576
19873 Calle Granada, Walnut, CA
0.42
Single-Family Home
$1,180,000
12/22/25
4
2.5
2,015
309 Camino De Gloria, Walnut, CA
0.65
Single-Family Home
$1,155,000
09/02/26
4
3.5
2,435
20530 Divonne Dr, Walnut, CA
0.32
Single-Family Home
$1,130,000
10/15/25
4
2
1,470
19819 Camino Arroyo, Walnut, CA
0.44
Single-Family Home
$1,200,000
05/04/26
4
3
1,859
20156 McKay Dr, Walnut, CA
0.19
Single-Family Home
$978,000
10/07/25
3
2
1,576
20538 Barnard Ave, Walnut, CA
0.58
Single-Family Home
$1,240,000
08/20/26
4
3
2,188
19735 Camino Arroyo, Walnut, CA
0.53
Single-Family Home
$1,235,000
05/26/26
4
2.5
1,859

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
144 N Dommer Ave, Walnut, CA 91789
0.05
$951,800
3
2
1,144
Off Market
20203 Vejar Rd, Walnut, CA 91789
0.03
$1,100,500
4
2
1,778
Off Market
20209 Vejar Rd, Walnut, CA 91789
0.05
$1,003,600
3
2
1,232
Off Market
197 Scherer Ave, Walnut, CA 91789
0.07
$953,500
3
2
1,226
Off Market
131 N Dommer Ave, Walnut, CA 91789
0.09
$873,200
4
2
1,232
Off Market
20115 Vejar Rd, Walnut, CA 91789
0.09
$875,000
3
2
1,144
Off Market
20136 Ferndoc St, Walnut, CA 91789
0.09
$1,252,500
4
3
1,840
Off Market
20243 Vejar Rd, Walnut, CA 91789
0.11
$973,600
3
2
1,429
Off Market
212 Macalester Dr, Walnut, CA 91789
0.11
$849,900
3
2
1,144
Off Market
146 Avenida Grulla, Walnut, CA 91789
0.14
$1,225,400
4
3
2,100
Off Market
135 Ricci Ave, Walnut, CA 91789
0.13
$1,360,900
5
3
2,267
Off Market

Local Information

  • Map ViewExplore the area around 20128 Diehl St.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Single-Family Home
Built in 2020
2,910 sqft
$567/sqft
2 Car Garage

About this House

Welcome to this versatile property in the highly desirable City of Walnut! Extensively renovated by the current owner, truly move-in ready!

This unique single-family residence has been thoughtfully configured into two separate living areas, offering exceptional flexibility for owner-users, multi-generational living, or potential rental income. Designed for easy maintenance, the backyard features a combination of concrete patio space and a grassy area, providing both convenience and outdoor enjoyment.

A separate living area with its own private entrance is ideal for extended family, guests, a home office, or potential rental opportunities. Conveniently located directly across from Vejar Elementary School, approximately lesser than 1 mile to highly rated Suzanne Middle School and Walnut High school, this home offers an outstanding location for families.

Whether you’re looking for a primary residence with flexible living space or an investment opportunity, this property offers exceptional versatility and value. Don’t miss this incredible opportunity!
20128 Diehl St, Walnut, CA 91789 is a 4 bedroom, 4 bathroom, 2,910 sqft single-family home built in 2020. It last sold for $1,650,000 on Sep 8, 2026 (4% below the $1,718,000 asking price). This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $1,687,500, with a rent estimate of $5,236/month.

Home Details for 20128 Diehl St

Interior Features

Interior Details
Number of Rooms: 3Types of Rooms: Family Room, Laundry
Beds & Baths
Number of Bedrooms: 4Main Level Bedrooms: 1Number of Bathrooms: 4Number of Bathrooms (full): 4Number of Bathrooms (main level): 1
Dimensions and Layout
Living Area: 2910 Square Feet
Appliances & Utilities
Appliances: Electric Cooktop, Gas CooktopLaundry: Inside,Outside
Heating & Cooling
Heating: CentralHas CoolingAir Conditioning: Central Air,DualHas HeatingHeating Fuel: Central
Fireplace & Spa
Fireplace: NoneSpa: NoneNo FireplaceNo Spa
Windows, Doors, Floors & Walls
Common Walls: 2+ Common Walls
Levels, Entrance, & Accessibility
Stories: 2Number of Stories: 2Levels: TwoEntry Location: front door
View
No View

Exterior Features

Exterior Home Features
Patio / Porch: PatioNo Private Pool
Parking & Garage
Number of Garage Spaces: 2Number of Covered Spaces: 2Has a GarageHas an Attached GarageParking Spaces: 2Parking: Garage Attached
Pool
Pool: None
Frontage
Not on Waterfront
Water & Sewer
Sewer: Public Sewer
Surface & Elevation
Elevation Units: Feet

Days on Market

Cumulative Days on Market: 19

Property Information

Year Built
Year Built: 2020
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family ResidenceStructure Type: HouseArchitecture: House
Building
Not a New ConstructionAttached To Another StructureNo Additional Parcels
Property Information
Parcel Number: 8720002010

Price & Status

Price
List Price: $1,718,000Price Per Sqft: $567/sqft
Status Change & Dates
Off Market Date: Tue Sep 08 2026

Active Status

MLS Status: Closed

Location

Direction & Address
City: Walnut
School Information
Elementary School: VejarJr High / Middle School: SuzanneHigh School: WalnutHigh School District: Walnut Valley Unified

Community

Community Features: SidewalksNot Senior CommunityUnits in Building: 1

HOA

Association for this Listing: California Regional MLS

Lot Information

Lot Area: 7300 sqft

Listing Info

Special Conditions: Standard

Offer

Listing Terms: Cash, Cash to New Loan, Conventional, 1031 Exchange

Miscellaneous

Mls Number: WS26144271Living Area Range Units: Square FeetAttribution Contact: 626-615-0493Activation Date: Wed Jul 22 2026Common Interest: NoneStart Showing Date: Wed Jul 22 2026Universal Property Id: US-06037-N-8720002010-R-N

Additional Information

SidewalksSource Internet Entire Listing Display

Price and Tax history

DateEventPrice
Sep 8, 2026
Source: CRMLS #WS26144271
Sold
$1,650,000
Aug 12, 2026
Source: CRMLS #WS26144271
Contingent
$1,718,000
Jul 22, 2026
Source: CRMLS #WS26144271
Listed For Sale
$1,718,000
Dec 15, 2020
Source: CRMLS #WS20160721
Sold
$1,100,000
Oct 14, 2020
Source: Agent Provided
Pending
$1,157,000

Market trends in Walnut

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
84
5MoM

Around this home

What Locals Say about Walnut

At least 124 Trulia users voted on each feature.

  • 88 % Say there are sidewalks

  • 88 % Say parking is easy

  • 81 % Say car is needed

  • 81 % Say yards are well-kept

  • 80 % Say it's dog friendly

  • 75 % Say it's quiet

  • 72 % Say streets are well-lit

  • 68 % Say people would walk alone at night

  • 63 % Say it's walkable to grocery stores

  • 63 % Say there's holiday spirit

  • 62 % Say there's wildlife

  • 62 % Say they plan to stay for at least 5 years

  • 47 % Say neighbors are friendly

  • 44 % Say it's walkable to restaurants

  • 44 % Say kids play outside

  • 30 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Nicholas R.
    "Very quiet neighborhood, not too much traffic, friendly neighbors. very nice and clean parks, that are close by. "
    4
    Flag
  • Angie.duran323
    "There’re lots of trails and long sidewalks in neighborhoods you can walk your dogs along. Sometimes all the dogs start barking at random times of day which is the only annoyance but other than that it’s great!"
    3
    Flag
  • T
    "City Walnut is known to have one the the best hiking trail in Southern California for adults, kids and pets"
    5
    Flag
  • Ronald G.
    "Public transportation is not very good. Especially for seniors living in the city. Stores are not really in walking distance and if you carry items, you will need to stop several times before getting home."
    1
    Flag
  • Ronald G.
    "The neighborhood is nice and people a generally nice. Easy to get around to stores and small shopping in the areas. If you want real shopping you have to leave the city."
    3
    Flag
  • sme2101
    "There are many families in our neighborhood, we have great parks, everyone is friendly and it’s a safe town"
    1
    Flag
  • Leslie a.
    "I lived here for about 6 years and I really enjoy the nature feel, the birds singing and the trails to walk on."
    2
    Flag
  • Fermin L.
    "I have lived here for the past 7 years and is a safe quiet neighborhood, great parks and city wide activities for children and adults, lots of trails to walk."
    1
    Flag
  • Needeposit
    "Living in the area for the last 20 years and in the same home for 12 years. Very safe area and one of the best school systems."
    1
    Flag
  • Ray
    "Great walking trails, very good schools and parks."
    1
    Flag

LGBTQ Local Legal Protections

The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.
Based on information from California Regional Multiple Listing Service, Inc. as of 2026-09-14 16:38:03 PDT and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

Frequently asked questions about 20128 Diehl St

  • What is 20128 Diehl St estimated to be worth?
    Trulia's estimated value for 20128 Diehl St in Walnut, CA is $1,687,500.
  • What is the price history for 20128 Diehl St?
    20128 Diehl St in Walnut, CA last sold for $1,650,000 in September 2026.
  • Is Walnut a buyer's or seller's market?
    Walnut is currently a seller's market, based on recent for-sale activity.
  • What do residents say about Walnut?
    Residents describe Walnut, CA as pedestrian-friendly, easy to park in, and well-kept. See recently sold homes in Walnut, CA.
  • Does 20128 Diehl St have air conditioning?
    Yes, 20128 Diehl St in Walnut, CA has air conditioning.
  • Does 20128 Diehl St have laundry facilities?
    Yes, 20128 Diehl St in Walnut, CA has laundry facilities.

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Off Market Homes Near 20128 Diehl St

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