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Off market apr 2020 for $1.1M

$1,829,814

Est. refi paymentEst. refi $6,718/mo

•

3,267

sq ft

1 Hidden Valley Rd, Monrovia, CA 91016

About this home

An unspoiled example of outstanding Mid-Century Modern, this home was designed by Ward R. Helman for himself and is now offered for sale by the family. Clad in redwood and set against the mountainside, the structure integrates seamlessly with its surroundings. A testament to form and foresight, the home offers radiant heating under the floors, hidden storage in almost every wall, beautiful Arcadia glass doors and windows, quarry tile floors in the living and dining room, and skylights throughout. The dining and family rooms feature walnut built-ins, and the master bedroom has a dramatic built-in headboard and matching bedside tables. The central kitchen and charming breakfast bar overlook an atrium accessible via sliders from the hallway and dining room. Tucked within the family room is a swank bar, as well as a sewing nook. The dramatic ceiling-height fireplace hood was also designed by the architect. An unusual find in Monrovia, this home has been designated a Historic Landmark and is eligible for a Mills Act Contract (buyer to confirm with City of Monrovia). Sited on a corner parcel in this peaceful enclave, the one-acre lot provides space and opportunity for gardens and enhancement. A unique and special property!

Single-familyProperty Type

1951Year Built

1 acresLot Size

$560Est. Price/Sq.Ft.

2 car garageParking

Listed by Tracy Alderson •DRE #00940205 • COMPASS

Listed by Susanne Kallis-Hayek •DRE #01947917 • COMPASS

Bought with Tina Lucarelli •DRE #02102354 • Rodeo Realty

Redfin checked: 2 minutes ago

•Source:CRMLS #P0-819005167

Redfin Estimate

$1,829,814

$670K since sold in April 2020$5,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 7.7% higher than the average sale price ($1.70M) of 6 comparable homes.

SOLD OCT 6, 2026
$1,645,000
A
3 beds2.5 baths2,459 sq ft
609 Willowbrook, Monrovia, CA 91016
Keller Williams OC Coastal Realty
SOLD JUL 31, 2026
$1,600,000
B
3 beds2 baths2,095 sq ft
1091 Briarcliff Rd, Monrovia, CA 91016
SOLD AUG 27, 2026
$1,650,000
C
3 beds3 baths1,952 sq ft
333 N Mayflower, Monrovia, CA 91016
SOLD AUG 12, 2026
$1,660,000
D
3 beds2 baths1,685 sq ft
1845 Alta Oaks Dr, Arcadia, CA 91006
SOLD APR 21, 2026
$1,979,000
E
4 beds2.5 baths3,045 sq ft
1069 Briarcliff Rd, Monrovia, CA 91016
SOLD SEP 4, 2026
$1,659,978
F
3 beds2.5 baths2,002 sq ft
209 N Sunset, Monrovia, CA 91016
Keller Williams Realty

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Earn from this home

Sell

$920,618

Est. take-home

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Refinance

Est. cash available

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Rent

$4,759/mo

Redfin rental estimate

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Market trends in 91016, CA

Last updated September 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-List Price

99.3%

1.6% MoM

Median sale price

$1,000K

$20K MoM

Avg. days on market

45d

2 days MoM

Recently sold homes

1 MoM

New listings for sale

COMING SOON
$775,000
4 beds2.5 baths1,582 sq ft
214 Violet Ave Unit F, Monrovia, CA 91016
3D WALKTHROUGH
$565,000
2 beds2 baths945 sq ft
1230 S Mayflower Ave Unit D, Monrovia, CA 91016
$860,000
3 beds2 baths1,328 sq ft
278 E Cherry, Monrovia, CA 91016
3D WALKTHROUGH
$1,998,800
3 beds4 baths3,183 sq ft
1001 Briarcliff, Monrovia, CA 91016
Keller Williams Realty
3D & VIDEO TOUR
$1,290,000
3 beds2 baths1,963 sq ft
212 N Canyon Blvd, Monrovia, CA 91016
$1,599,000
5 beds6 baths2,574 sq ft
266 Brisbane St, Monrovia, CA 91016
OPEN WED, 11AM TO 2PM
$898,000
2 beds1 bath917 sq ft
427 Heather Heights Ct, Monrovia, CA 91016
$869,000
2 beds2 baths1,080 sq ft
148 N Shamrock, Monrovia, CA 91016
3D WALKTHROUGH
$648,000
2 beds3 baths1,193 sq ft
509 W Duarte Unit B, Monrovia, CA 91016
$905,000
3 beds2 baths1,316 sq ft
857 Encino Way, Monrovia, CA 91016
See all

Provided by Redfin

Sale history for 1 Hidden Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$6,717 (+0.5%)

$296,300 + $194,700

$491,000

2024

$6,684 (−17.2%)

$279,400 + $183,600

$463,000

2023

$8,069 (−0.8%)

$279,400 + $183,600

$463,000

2022

$8,133 (−47.6%)

$346,400 + $227,600

$574,000

2021

$15,515 (+518.5%)

$721,397 + $474,060

$1,195,457

2020

$2,508 (+1.5%)

$707,252 + $464,765

$1,172,017

2019

$2,471 (+8.0%)

$42,565 + $103,767

$146,332

2018

$2,289 (+1.7%)

$41,731 + $101,733

$143,464

2017

$2,250 (+3.8%)

$40,111 + $97,784

$137,895

2016

$2,168 (+2.0%)

$40,111 + $97,784

$137,895

2015

$2,125 (−0.2%)

$39,325 + $95,867

$135,192

2014

$2,129 (+2.0%)

$37,977 + $92,578

$130,555

2012

$2,087 (+2.0%)

$37,806 + $92,160

$129,966

2011

$2,047 (+1.8%)

$37,065 + $90,353

$127,418

2010

$2,010 (+2.2%)

$36,339 + $88,582

$124,921

2009

$1,967 (+2.0%)

$36,068 + $87,920

$123,988

2008

$1,929

$36,154 + $88,129

$124,283

Tax history for 1 Hidden Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$6,717 (+0.5%)

$296,300 + $194,700

$491,000

2024

$6,684 (−17.2%)

$279,400 + $183,600

$463,000

2023

$8,069 (−0.8%)

$279,400 + $183,600

$463,000

2022

$8,133 (−47.6%)

$346,400 + $227,600

$574,000

2021

$15,515 (+518.5%)

$721,397 + $474,060

$1,195,457

2020

$2,508 (+1.5%)

$707,252 + $464,765

$1,172,017

2019

$2,471 (+8.0%)

$42,565 + $103,767

$146,332

2018

$2,289 (+1.7%)

$41,731 + $101,733

$143,464

2017

$2,250 (+3.8%)

$40,111 + $97,784

$137,895

2016

$2,168 (+2.0%)

$40,111 + $97,784

$137,895

2015

$2,125 (−0.2%)

$39,325 + $95,867

$135,192

2014

$2,129 (+2.0%)

$37,977 + $92,578

$130,555

2012

$2,087 (+2.0%)

$37,806 + $92,160

$129,966

2011

$2,047 (+1.8%)

$37,065 + $90,353

$127,418

2010

$2,010 (+2.2%)

$36,339 + $88,582

$124,921

2009

$1,967 (+2.0%)

$36,068 + $87,920

$123,988

2008

$1,929

$36,154 + $88,129

$124,283

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

Public record

Beds

Baths

Stories

—

Lot width

—

Lot depth

—

Lot size

1 Acre

Year renovated

1960

Sq. Ft.

3,267

Year built

1951

Style

Single Family Residential

County

Los Angeles County

APN

8520001001

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 7, 2026.

Property details

Parking

Parking / Garage Information
# of Garage Spaces: 2
# of Parking Spaces: 2

Interior

Bathroom Information
# of Baths (Full): 2
# of Baths (1/2): 1

Fireplace Information
Family Room, Living Room
Has Fireplace

Interior Features
Levels: One

Exterior

Lot Information
Lot Size Source: Public Records

Property Information
Common Walls: No Common Walls
Living Area Source: Public Records
Parcel Number: 8520001001
Total # of Stories: 1
Year Built Source: Assessor

Location

Location Information
Latitude: 34.16335300
Longitude: -118.00787200
Directions: Cross Street: Alta Vista; North of 210 Freeway, exit Myrtle, head north on Myrtle, head west on Foothill Boulevard, north on Alta Vista, turn left on Cloverleaf Drive, veer right at fork to be on Hidden Valley. House is on the left side of road.
Subdivision Name: Other
Zoning: MORF*

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 3,267
Stories: —
Lot Size: 1 acres
Style: Single Family Residential
Year Built: 1951
Year Renovated: 1960
County: Los Angeles County
APN: 8520001001

Home facts updated by county records on Oct 7, 2026

Other

Listing Information
Days Active in MLS: 151
Continuous Days Active in MLS: 151

Listing Agent Information
List Agent First Name: Tracy
List Agent Last Name: Alderson
Co-List Agent First Name: Susanne
Co-List Agent Last Name: Kallis-Hayek

Listing Office Information
List Office Name: COMPASS
Co-List Office Name: COMPASS

Selling Agent Information
Buyer Agent First Name: Tina
Buyer Agent Last Name: Lucarelli

Selling Office Information
Buyer Office Name: Rodeo Realty

Around this home

Schools

Mayflower Elementary School

Public Tk-6 • Assigned • 0.7mi

10/10

Clifton Middle School

Public 7-8 • Assigned • 1.1mi

7/10

Monrovia High School

Public 9-12 • Assigned • 1.2mi

7/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

Monrovia offers a blend of historic charm and everyday convenience, with a walkable Old Town area lined with local shops, restaurants, and community events. Residents enjoy access to parks, the Monrovia Canyon Park area, the Metro A Line, and...
1 month ago • Monrovia
Josh Ritnimit
Redfin Premier agent
345 deals
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Climate risks

9/10 Flood Factor

Estimated 80%+ chance of a flood reaching the building in the next 30 years

7/10 Fire Factor

15% chance of being in a wildfire in next 30 years

6/10 Heat Factor

7 days above 98° expected this year, 19 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

9/10 Air Factor

21 unhealthy days expected this year, 23 days in 30 years

Provided by First Street

Historical weather

Monrovia, CA • 91016

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 9.7 hours in June and 6.8 hours in December, placing it above the U.S. average for solar exposure.

9.7 hrs

6.8 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.74M – $2.11M

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Nearby similar homes

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3D WALKTHROUGH

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5 beds6 baths5,906 sq ft

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New listings for sale in 91016

COMING SOON

$775,000

4 beds2.5 baths1,582 sq ft

214 Violet Ave Unit F, Monrovia, CA 91016

3D WALKTHROUGH

$565,000

2 beds2 baths945 sq ft

1230 S Mayflower Ave Unit D, Monrovia, CA 91016

$860,000

3 beds2 baths1,328 sq ft

278 E Cherry, Monrovia, CA 91016

3D WALKTHROUGH

$1,998,800

3 beds4 baths3,183 sq ft

1001 Briarcliff, Monrovia, CA 91016

Keller Williams Realty

3D & VIDEO TOUR

$1,290,000

3 beds2 baths1,963 sq ft

212 N Canyon Blvd, Monrovia, CA 91016

$1,599,000

5 beds6 baths2,574 sq ft

266 Brisbane St, Monrovia, CA 91016

OPEN WED, 11AM TO 2PM

$898,000

2 beds1 bath917 sq ft

427 Heather Heights Ct, Monrovia, CA 91016

$869,000

2 beds2 baths1,080 sq ft

148 N Shamrock, Monrovia, CA 91016

3D WALKTHROUGH

$648,000

2 beds3 baths1,193 sq ft

509 W Duarte Unit B, Monrovia, CA 91016

Home values near 1 Hidden Valley Rd

Data from public records.

Address	Redfin Estimate
3 Hidden Valley Road, Monrovia, CA 4 Beds \| 4 Baths \| 3036 Sq. Ft.	$1,777,183
10 Hidden Valley Road, Monrovia, CA 2 Beds \| 1.5 Baths \| 1789 Sq. Ft.	$1,511,139

Address	Redfin Estimate
5 Hidden Valley Road, Monrovia, CA 4 Beds \| 3 Baths \| 3033 Sq. Ft.	$1,696,506
8 Hidden Valley Road, Monrovia, CA 3 Beds \| 2 Baths \| 1863 Sq. Ft.	$1,527,525

Address	Redfin Estimate
11 Hidden Valley Road, Monrovia, CA 3 Beds \| 1 Baths \| 1254 Sq. Ft.	$1,203,499
2 Hidden Valley Road, Monrovia, CA 6 Beds \| 6.5 Baths \| 5400 Sq. Ft.	$2,950,503

Property information provided by CRMLS when last listed in 2019. This data may not match . Learn more.

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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 91016, CA

Sale history for 1 Hidden Valley Rd

Tax history for 1 Hidden Valley Rd

Public record

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 91016

Home values near 1 Hidden Valley Rd

More real estate resources